diff --git a/StaggeredWaveToyX/README b/StaggeredWaveToyX/README
new file mode 100644
index 000000000..cd107b138
--- /dev/null
+++ b/StaggeredWaveToyX/README
@@ -0,0 +1,9 @@
+Cactus Code Thorn StaggeredWaveToyX
+Author(s)    : Erik Schnetter <schnetter@gmail.com>
+Maintainer(s): Erik Schnetter <schnetter@gmail.com>
+Licence      : LGPL
+--------------------------------------------------------------------------
+
+1. Purpose
+
+Solve the scalar wave equation using staggered grids.
diff --git a/StaggeredWaveToyX/configuration.ccl b/StaggeredWaveToyX/configuration.ccl
new file mode 100644
index 000000000..2dc042c4a
--- /dev/null
+++ b/StaggeredWaveToyX/configuration.ccl
@@ -0,0 +1,3 @@
+# Configuration definitions for thorn StaggeredWaveToyX
+
+REQUIRES Loop
diff --git a/StaggeredWaveToyX/interface.ccl b/StaggeredWaveToyX/interface.ccl
new file mode 100644
index 000000000..272348b9f
--- /dev/null
+++ b/StaggeredWaveToyX/interface.ccl
@@ -0,0 +1,99 @@
+# Interface definition for thorn StaggeredWaveToyX
+
+IMPLEMENTS: StaggeredWaveToyX
+
+USES INCLUDE HEADER: loop_device.hxx
+USES INCLUDE HEADER: vect.hxx
+
+
+
+CCTK_REAL ustate TYPE=gf CENTERING={vvv} TAGS='rhs="urhs" dependents="uerror energy"'
+{
+  u
+  ft
+} "Scalar wave state vector"
+
+CCTK_REAL fxstate TYPE=gf CENTERING={cvv} TAGS='parities={-1 +1 +1} rhs="fxrhs" dependents="fxerror energy"'
+{
+  fx
+} "Scalar wave state vector, staggered in x direction"
+
+CCTK_REAL fystate TYPE=gf CENTERING={vcv} TAGS='parities={+1 -1 +1} rhs="fyrhs" dependents="fyerror energy"'
+{
+  fy
+} "Scalar wave state vector, staggered in y direction"
+
+CCTK_REAL fzstate TYPE=gf CENTERING={vvc} TAGS='parities={+1 +1 -1} rhs="fzrhs" dependents="fzerror energy"'
+{
+  fz
+} "Scalar wave state vector, staggered in z direction"
+
+
+
+CCTK_REAL urhs TYPE=gf CENTERING={vvv} TAGS='checkpoint="no"'
+{
+  u_rhs
+  ft_rhs
+} "Scalar wave rhs"
+
+CCTK_REAL fxrhs TYPE=gf CENTERING={cvv} TAGS='parities={-1 +1 +1} checkpoint="no"'
+{
+  fx_rhs
+} "Scalar wave rhs, staggered in x direction"
+
+CCTK_REAL fyrhs TYPE=gf CENTERING={vcv} TAGS='parities={+1 -1 +1} checkpoint="no"'
+{
+  fy_rhs
+} "Scalar wave rhs, staggered in y direction"
+
+CCTK_REAL fzrhs TYPE=gf CENTERING={vvc} TAGS='parities={+1 +1 -1} checkpoint="no"'
+{
+  fz_rhs
+} "Scalar wave rhs, staggered in z direction"
+
+
+
+CCTK_REAL curlfx TYPE=gf CENTERING={vcc} TAGS='parities={+1 -1 -1} checkpoint="no"'
+{
+  curlfx
+} "Constraints, staggered in x direction"
+
+CCTK_REAL curlfy TYPE=gf CENTERING={cvc} TAGS='parities={-1 +1 -1} checkpoint="no"'
+{
+  curlfy
+} "Constraints, staggered in y direction"
+
+CCTK_REAL curlfz TYPE=gf CENTERING={ccv} TAGS='parities={-1 -1 +1} checkpoint="no"'
+{
+  curlfz
+} "Constraints, staggered in z direction"
+
+
+
+CCTK_REAL energy CENTERING={CCC} TYPE=gf TAGS='checkpoint="no"'
+{
+  eps
+} "Energy density"
+
+
+
+CCTK_REAL uerror TYPE=gf CENTERING={vvv} TAGS='checkpoint="no"'
+{
+  u_err
+  ft_err
+} "Scalar wave error"
+
+CCTK_REAL fxerror TYPE=gf CENTERING={cvv} TAGS='parities={-1 +1 +1} checkpoint="no"'
+{
+  fx_err
+} "Scalar wave error, staggered in x direction"
+
+CCTK_REAL fyerror TYPE=gf CENTERING={vcv} TAGS='parities={+1 -1 +1} checkpoint="no"'
+{
+  fy_err
+} "Scalar wave error, staggered in y direction"
+
+CCTK_REAL fzerror TYPE=gf CENTERING={vvc} TAGS='parities={+1 +1 -1} checkpoint="no"'
+{
+  fz_err
+} "Scalar wave error, staggered in z direction"
diff --git a/StaggeredWaveToyX/par/standing.par b/StaggeredWaveToyX/par/standing.par
new file mode 100644
index 000000000..6bcee9682
--- /dev/null
+++ b/StaggeredWaveToyX/par/standing.par
@@ -0,0 +1,61 @@
+ActiveThorns = "
+    CarpetX
+    IOUtil
+    ODESolvers
+    StaggeredWaveToyX
+    TimerReport
+"
+
+$out_every = 16
+
+Cactus::cctk_show_schedule = no
+Cactus::presync_mode = "mixed-error"
+
+CarpetX::poison_undefined_values = no
+
+CarpetX::periodic_x = yes
+CarpetX::periodic_y = yes
+CarpetX::periodic_z = yes
+
+Cactus::terminate = "time"
+Cactus::cctk_final_time = 1.0
+
+StaggeredWaveToyX::initial_condition = "standing wave"
+
+ODESolvers::method = "RK3"
+
+IO::out_dir = $parfile
+IO::out_every = $out_every
+
+CarpetX::out_norm_vars = "all"
+
+CarpetX::out_tsv_vars = "
+    StaggeredWaveToyX::ustate
+    StaggeredWaveToyX::fxstate
+    StaggeredWaveToyX::fystate
+    StaggeredWaveToyX::fzstate
+    StaggeredWaveToyX::urhs
+    StaggeredWaveToyX::fxrhs
+    StaggeredWaveToyX::fyrhs
+    StaggeredWaveToyX::fzrhs
+    StaggeredWaveToyX::curlfx
+    StaggeredWaveToyX::curlfy
+    StaggeredWaveToyX::curlfz
+    StaggeredWaveToyX::energy
+    StaggeredWaveToyX::uerror
+    StaggeredWaveToyX::fxerror
+    StaggeredWaveToyX::fyerror
+    StaggeredWaveToyX::fzerror
+"
+
+CarpetX::out_silo_vars = "
+    StaggeredWaveToyX::ustate
+    StaggeredWaveToyX::urhs
+    StaggeredWaveToyX::energy
+    StaggeredWaveToyX::uerror
+"
+
+TimerReport::out_every = $out_every
+TimerReport::out_filename = "TimerReport"
+TimerReport::output_schedule_timers = no
+TimerReport::n_top_timers = 100
diff --git a/StaggeredWaveToyX/param.ccl b/StaggeredWaveToyX/param.ccl
new file mode 100644
index 000000000..73b9e09e3
--- /dev/null
+++ b/StaggeredWaveToyX/param.ccl
@@ -0,0 +1,32 @@
+# Parameter definitions for thorn StaggeredWaveToyX
+
+KEYWORD initial_condition "Initial condition"
+{
+  "standing wave" :: "Standing wave"
+  "Gaussian" :: "Gaussian"
+} "standing wave"
+
+CCTK_REAL amplitude "Initial amplitude"
+{
+  *:* :: ""
+} 1.0
+
+CCTK_REAL standing_wave_kx "kx for standing wave"
+{
+  *:* :: ""
+} 0.5
+
+CCTK_REAL standing_wave_ky "kz for standing wave"
+{
+  *:* :: ""
+} 0.5
+
+CCTK_REAL standing_wave_kz "ky for standing wave"
+{
+  *:* :: ""
+} 0.5
+
+CCTK_REAL gaussian_width "width of Gaussian"
+{
+  (0:* :: ""
+} 1.0
diff --git a/StaggeredWaveToyX/schedule.ccl b/StaggeredWaveToyX/schedule.ccl
new file mode 100644
index 000000000..759b177fa
--- /dev/null
+++ b/StaggeredWaveToyX/schedule.ccl
@@ -0,0 +1,75 @@
+# Schedule definitions for thorn StaggeredWaveToyX
+
+STORAGE: ustate fxstate fystate fzstate
+
+SCHEDULE StaggeredWaveToyX_Initial AT initial
+{
+  LANG: C
+  WRITES: ustate(interior)
+  WRITES: fxstate(interior)
+  WRITES: fystate(interior)
+  WRITES: fzstate(interior)
+  SYNC: ustate
+  SYNC: fxstate
+  SYNC: fystate
+  SYNC: fzstate
+} "Initialize scalar wave state"
+
+SCHEDULE StaggeredWaveToyX_RHS IN ODESolvers_RHS
+{
+  LANG: C
+  READS: ustate(everywhere)
+  READS: fxstate(everywhere)
+  READS: fystate(everywhere)
+  READS: fzstate(everywhere)
+  WRITES: urhs(interior)
+  WRITES: fxrhs(interior)
+  WRITES: fyrhs(interior)
+  WRITES: fzrhs(interior)
+  SYNC: urhs
+  SYNC: fxrhs
+  SYNC: fyrhs
+  SYNC: fzrhs
+} "Calculate scalar wave RHS"
+
+SCHEDULE StaggeredWaveToyX_Constraints IN ODESolvers_PostStep
+{
+  LANG: C
+  READS: fxstate(interior)
+  READS: fystate(interior)
+  READS: fzstate(interior)
+  WRITES: curlfx(interior)
+  WRITES: curlfy(interior)
+  WRITES: curlfz(interior)
+  SYNC: curlfx
+  SYNC: curlfy
+  SYNC: curlfz
+} "Calculate scalar wave constraints"
+
+SCHEDULE StaggeredWaveToyX_Energy IN ODESolvers_PostStep
+{
+  LANG: C
+  READS: ustate(interior)
+  READS: fxstate(interior)
+  READS: fystate(interior)
+  READS: fzstate(interior)
+  WRITES: energy(interior)
+  SYNC: energy
+} "Calculate scalar wave energy density"
+
+SCHEDULE StaggeredWaveToyX_Error IN ODESolvers_PostStep
+{
+  LANG: C
+  READS: ustate(interior)
+  READS: fxstate(interior)
+  READS: fystate(interior)
+  READS: fzstate(interior)
+  WRITES: uerror(interior)
+  WRITES: fxerror(interior)
+  WRITES: fyerror(interior)
+  WRITES: fzerror(interior)
+  SYNC: uerror
+  SYNC: fxerror
+  SYNC: fyerror
+  SYNC: fzerror
+} "Calculate error in scalar wave state"
diff --git a/StaggeredWaveToyX/src/make.code.defn b/StaggeredWaveToyX/src/make.code.defn
new file mode 100644
index 000000000..5a80087dc
--- /dev/null
+++ b/StaggeredWaveToyX/src/make.code.defn
@@ -0,0 +1,7 @@
+# Main make.code.defn file for thorn StaggeredWaveToyX
+
+# Source files in this directory
+SRCS = staggeredwavetoyx.cxx
+
+# Subdirectories containing source files
+SUBDIRS =
diff --git a/StaggeredWaveToyX/src/staggeredwavetoyx.cxx b/StaggeredWaveToyX/src/staggeredwavetoyx.cxx
new file mode 100644
index 000000000..d25dd4b1a
--- /dev/null
+++ b/StaggeredWaveToyX/src/staggeredwavetoyx.cxx
@@ -0,0 +1,365 @@
+#include <loop_device.hxx>
+
+#include <sum.hxx>
+#include <vect.hxx>
+
+#include <cctk.h>
+#include <cctk_Arguments.h>
+#include <cctk_Parameters.h>
+
+#include <array>
+#include <cassert>
+#include <cmath>
+#include <limits>
+
+namespace StaggeredWaveToyX {
+
+constexpr int dim = 3;
+
+// u(t,x,y,z) =
+//   A cos(2 π omega t) cos(2 π kx x) cos(2 π ky y) cos(2 π kz z)
+template <typename T>
+constexpr void standing_wave(const T A, const Arith::vect<T, dim> &k, const T t,
+                             const Arith::vect<T, dim> &x, T &u, T &ft) {
+  using std::acos, std::cos, std::pow, std::sin, std::sqrt;
+
+  const T pi = acos(-T(1));
+  const T omega = sqrt(dot(k, k));
+
+  u = A * cos(2 * pi * omega * t) * cos(2 * pi * k[0] * x[0]) *
+      cos(2 * pi * k[1] * x[1]) * cos(2 * pi * k[2] * x[2]);
+  ft = A * (-2 * pi * omega) * sin(2 * pi * omega * t) *
+       cos(2 * pi * k[0] * x[0]) * cos(2 * pi * k[1] * x[1]) *
+       cos(2 * pi * k[2] * x[2]);
+}
+
+// u(t,r) = (f(t-r) - f(t+r)) / r
+// f(v) = A exp(-1/2 (r/W)^2)
+template <typename T>
+constexpr void gaussian(const T A, const T W, const T t,
+                        const Arith::vect<T, dim> &x, T &u, T &ft) {
+  using std::exp, std::pow, std::sqrt;
+
+  const T r = sqrt(dot(x, x));
+
+  const auto f = [&](const T v) {
+    return A * exp(-pow(v, 2) / (2 * pow(W, 2)));
+  };
+
+  if (r < sqrt(std::numeric_limits<T>::epsilon())) {
+    // L'Hôpital
+    u = 2 / pow(W, 2) * f(t) * t;
+    ft = -2 / pow(W, 4) * f(t) * (pow(t, 2) - pow(W, 2));
+  } else {
+    u = (f(t - r) - f(t + r)) / r;
+    ft = -(f(t - r) * (t - r) - f(t + r) * (t + r)) / (pow(W, 2) * r);
+  }
+}
+
+extern "C" void StaggeredWaveToyX_Initial(CCTK_ARGUMENTS) {
+  DECLARE_CCTK_ARGUMENTSX_StaggeredWaveToyX_Initial;
+  DECLARE_CCTK_PARAMETERS;
+
+  if (CCTK_EQUALS(initial_condition, "standing wave")) {
+
+    grid.loop_int_device<0, 0, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          CCTK_REAL u0, ft0;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, p.X, u0, ft0);
+          u(p.I) = u0;
+          ft(p.I) = ft0;
+        });
+
+    grid.loop_int_device<1, 0, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[0] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[0] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xp, up, ftp);
+          fx(p.I) = (up - um) / p.DX[0];
+        });
+
+    grid.loop_int_device<0, 1, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[1] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[1] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xp, up, ftp);
+          fy(p.I) = (up - um) / p.DX[1];
+        });
+
+    grid.loop_int_device<0, 0, 1>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[2] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[2] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xp, up, ftp);
+          fz(p.I) = (up - um) / p.DX[2];
+        });
+
+  } else if (CCTK_EQUALS(initial_condition, "Gaussian")) {
+
+    grid.loop_int_device<0, 0, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          CCTK_REAL u0, ft0;
+          gaussian(amplitude, gaussian_width, cctk_time, p.X, u0, ft0);
+          u(p.I) = u0;
+          ft(p.I) = ft0;
+        });
+
+    grid.loop_int_device<1, 0, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[0] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          gaussian(amplitude, gaussian_width, cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[0] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          gaussian(amplitude, gaussian_width, cctk_time, Xp, up, ftp);
+          fx(p.I) = (up - um) / p.DX[0];
+        });
+
+    grid.loop_int_device<0, 1, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[1] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          gaussian(amplitude, gaussian_width, cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[1] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          gaussian(amplitude, gaussian_width, cctk_time, Xp, up, ftp);
+          fy(p.I) = (up - um) / p.DX[1];
+        });
+
+    grid.loop_int_device<0, 0, 1>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[2] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          gaussian(amplitude, gaussian_width, cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[2] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          gaussian(amplitude, gaussian_width, cctk_time, Xp, up, ftp);
+          fz(p.I) = (up - um) / p.DX[2];
+        });
+
+  } else {
+    CCTK_ERROR("Unknown initial condition");
+  }
+}
+
+extern "C" void StaggeredWaveToyX_RHS(CCTK_ARGUMENTS) {
+  DECLARE_CCTK_ARGUMENTSX_StaggeredWaveToyX_RHS;
+
+  grid.loop_int_device<0, 0, 0>(
+      grid.nghostzones,
+      [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+        u_rhs(p.I) = ft(p.I);
+        ft_rhs(p.I) = (fx(p.I) - fx(p.I - p.DI[0])) / p.DX[0] +
+                      (fy(p.I) - fy(p.I - p.DI[1])) / p.DX[1] +
+                      (fz(p.I) - fz(p.I - p.DI[2])) / p.DX[2];
+      });
+
+  grid.loop_int_device<1, 0, 0>(
+      grid.nghostzones,
+      [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+        fx_rhs(p.I) = (ft(p.I + p.DI[0]) - ft(p.I)) / p.DX[0];
+      });
+
+  grid.loop_int_device<0, 1, 0>(
+      grid.nghostzones,
+      [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+        fy_rhs(p.I) = (ft(p.I + p.DI[1]) - ft(p.I)) / p.DX[1];
+      });
+
+  grid.loop_int_device<0, 0, 1>(
+      grid.nghostzones,
+      [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+        fz_rhs(p.I) = (ft(p.I + p.DI[2]) - ft(p.I)) / p.DX[2];
+      });
+}
+
+extern "C" void StaggeredWaveToyX_Constraints(CCTK_ARGUMENTS) {
+  DECLARE_CCTK_ARGUMENTSX_StaggeredWaveToyX_Constraints;
+
+  grid.loop_int_device<0, 1, 1>(
+      grid.nghostzones,
+      [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+        curlfx(p.I) = (fz(p.I + p.DI[1]) - fz(p.I)) / p.DX[1] -
+                      (fy(p.I + p.DI[2]) - fy(p.I)) / p.DX[2];
+      });
+
+  grid.loop_int_device<1, 0, 1>(
+      grid.nghostzones,
+      [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+        curlfy(p.I) = (fx(p.I + p.DI[2]) - fx(p.I)) / p.DX[2] -
+                      (fz(p.I + p.DI[0]) - fz(p.I)) / p.DX[0];
+      });
+
+  grid.loop_int_device<1, 1, 0>(
+      grid.nghostzones,
+      [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+        curlfz(p.I) = (fy(p.I + p.DI[0]) - fy(p.I)) / p.DX[0] -
+                      (fx(p.I + p.DI[1]) - fx(p.I)) / p.DX[1];
+      });
+}
+
+extern "C" void StaggeredWaveToyX_Energy(CCTK_ARGUMENTS) {
+  DECLARE_CCTK_ARGUMENTSX_StaggeredWaveToyX_Energy;
+
+  using std::pow;
+
+  grid.loop_int_device<1, 1, 1>(
+      grid.nghostzones,
+      [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+        eps(p.I) =
+            (pow(ft(p.I), 2) + pow((fx(p.I) + fx(p.I + p.DI[0])) / 2, 2) +
+             pow((fy(p.I) + fy(p.I + p.DI[1])) / 2, 2) +
+             pow((fz(p.I) + fz(p.I + p.DI[2])) / 2, 2)) /
+            2;
+      });
+}
+
+extern "C" void StaggeredWaveToyX_Error(CCTK_ARGUMENTS) {
+  DECLARE_CCTK_ARGUMENTSX_StaggeredWaveToyX_Error;
+  DECLARE_CCTK_PARAMETERS;
+
+  if (CCTK_EQUALS(initial_condition, "standing wave")) {
+
+    grid.loop_int_device<0, 0, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          CCTK_REAL u0, ft0;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, p.X, u0, ft0);
+          u_err(p.I) = u(p.I) - u0;
+          ft_err(p.I) = ft(p.I) - ft0;
+        });
+
+    grid.loop_int_device<1, 0, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[0] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[0] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xp, up, ftp);
+          fx_err(p.I) = fx(p.I) - (up - um) / p.DX[0];
+        });
+
+    grid.loop_int_device<0, 1, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[1] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[1] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xp, up, ftp);
+          fy_err(p.I) = fy(p.I) - (up - um) / p.DX[1];
+        });
+
+    grid.loop_int_device<0, 0, 1>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[2] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[2] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          standing_wave(amplitude,
+                        {standing_wave_kx, standing_wave_ky, standing_wave_kz},
+                        cctk_time, Xp, up, ftp);
+          fz_err(p.I) = fz(p.I) - (up - um) / p.DX[2];
+        });
+
+  } else if (CCTK_EQUALS(initial_condition, "Gaussian")) {
+
+    grid.loop_int_device<0, 0, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          CCTK_REAL u0, ft0;
+          gaussian(amplitude, gaussian_width, cctk_time, p.X, u0, ft0);
+          u_err(p.I) = u(p.I) - u0;
+          ft_err(p.I) = ft(p.I) - ft0;
+        });
+
+    grid.loop_int_device<1, 0, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[0] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          gaussian(amplitude, gaussian_width, cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[0] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          gaussian(amplitude, gaussian_width, cctk_time, Xp, up, ftp);
+          fx_err(p.I) = fx(p.I) - (up - um) / p.DX[0];
+        });
+
+    grid.loop_int_device<0, 1, 0>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[1] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          gaussian(amplitude, gaussian_width, cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[1] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          gaussian(amplitude, gaussian_width, cctk_time, Xp, up, ftp);
+          fy_err(p.I) = fy(p.I) - (up - um) / p.DX[1];
+        });
+
+    grid.loop_int_device<0, 0, 1>(
+        grid.nghostzones,
+        [=] CCTK_DEVICE(const Loop::PointDesc &p) CCTK_ATTRIBUTE_ALWAYS_INLINE {
+          const auto Xm = p.X - p.DI[2] * p.DX / 2;
+          CCTK_REAL um, ftm;
+          gaussian(amplitude, gaussian_width, cctk_time, Xm, um, ftm);
+          const auto Xp = p.X + p.DI[2] * p.DX / 2;
+          CCTK_REAL up, ftp;
+          gaussian(amplitude, gaussian_width, cctk_time, Xp, up, ftp);
+          fz_err(p.I) = fz(p.I) - (up - um) / p.DX[2];
+        });
+
+  } else {
+    CCTK_ERROR("Unknown initial condition");
+  }
+}
+
+} // namespace StaggeredWaveToyX
diff --git a/StaggeredWaveToyX/test/standing.par b/StaggeredWaveToyX/test/standing.par
new file mode 100644
index 000000000..c7b9a407d
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing.par
@@ -0,0 +1,53 @@
+ActiveThorns = "
+    CarpetX
+    IOUtil
+    ODESolvers
+    StaggeredWaveToyX
+"
+
+$out_every = 16
+
+Cactus::cctk_show_schedule = no
+Cactus::presync_mode = "mixed-error"
+
+CarpetX::poison_undefined_values = yes
+
+CarpetX::ncells_x = 8
+CarpetX::ncells_y = 8
+CarpetX::ncells_z = 8
+
+CarpetX::periodic_x = yes
+CarpetX::periodic_y = yes
+CarpetX::periodic_z = yes
+
+Cactus::cctk_itlast = 10
+
+StaggeredWaveToyX::initial_condition = "standing wave"
+
+ODESolvers::method = "RK3"
+
+IO::out_dir = $parfile
+IO::out_every = $out_every
+
+CarpetX::out_metadata = no
+CarpetX::out_norm_vars = "all"
+CarpetX::out_norm_omit_unstable = yes
+
+CarpetX::out_tsv_vars = "
+    StaggeredWaveToyX::ustate
+    StaggeredWaveToyX::fxstate
+    StaggeredWaveToyX::fystate
+    StaggeredWaveToyX::fzstate
+    StaggeredWaveToyX::urhs
+    StaggeredWaveToyX::fxrhs
+    StaggeredWaveToyX::fyrhs
+    StaggeredWaveToyX::fzrhs
+    StaggeredWaveToyX::curlfx
+    StaggeredWaveToyX::curlfy
+    StaggeredWaveToyX::curlfz
+    StaggeredWaveToyX::energy
+    StaggeredWaveToyX::uerror
+    StaggeredWaveToyX::fxerror
+    StaggeredWaveToyX::fyerror
+    StaggeredWaveToyX::fzerror
+"
diff --git a/StaggeredWaveToyX/test/standing/norms/carpetx-regrid_error.tsv b/StaggeredWaveToyX/test/standing/norms/carpetx-regrid_error.tsv
new file mode 100644
index 000000000..6b789f3c3
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/carpetx-regrid_error.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:carpetx::regrid_error.min	4:carpetx::regrid_error.max	5:carpetx::regrid_error.sum	6:carpetx::regrid_error.avg	7:carpetx::regrid_error.stddev	8:carpetx::regrid_error.volume	9:carpetx::regrid_error.L1norm	10:carpetx::regrid_error.L2norm	11:carpetx::regrid_error.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-curlfx.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-curlfx.tsv
new file mode 100644
index 000000000..518aaaddc
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-curlfx.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::curlfx.min	4:staggeredwavetoyx::curlfx.max	5:staggeredwavetoyx::curlfx.sum	6:staggeredwavetoyx::curlfx.avg	7:staggeredwavetoyx::curlfx.stddev	8:staggeredwavetoyx::curlfx.volume	9:staggeredwavetoyx::curlfx.L1norm	10:staggeredwavetoyx::curlfx.L2norm	11:staggeredwavetoyx::curlfx.maxabs
+0	0.0000000000000000e+00	-1.3322676295501878e-15	1.3322676295501878e-15	0.0000000000000000e+00	0.0000000000000000e+00	4.9650683064945462e-16	8.0000000000000000e+00	2.4980018054066022e-16	4.9650683064945462e-16	1.3322676295501878e-15
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-curlfy.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-curlfy.tsv
new file mode 100644
index 000000000..5e49dcd21
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-curlfy.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::curlfy.min	4:staggeredwavetoyx::curlfy.max	5:staggeredwavetoyx::curlfy.sum	6:staggeredwavetoyx::curlfy.avg	7:staggeredwavetoyx::curlfy.stddev	8:staggeredwavetoyx::curlfy.volume	9:staggeredwavetoyx::curlfy.L1norm	10:staggeredwavetoyx::curlfy.L2norm	11:staggeredwavetoyx::curlfy.maxabs
+0	0.0000000000000000e+00	-1.3322676295501878e-15	1.3322676295501878e-15	0.0000000000000000e+00	0.0000000000000000e+00	4.9650683064945462e-16	8.0000000000000000e+00	2.4980018054066022e-16	4.9650683064945462e-16	1.3322676295501878e-15
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-curlfz.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-curlfz.tsv
new file mode 100644
index 000000000..b3321f2a8
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-curlfz.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::curlfz.min	4:staggeredwavetoyx::curlfz.max	5:staggeredwavetoyx::curlfz.sum	6:staggeredwavetoyx::curlfz.avg	7:staggeredwavetoyx::curlfz.stddev	8:staggeredwavetoyx::curlfz.volume	9:staggeredwavetoyx::curlfz.L1norm	10:staggeredwavetoyx::curlfz.L2norm	11:staggeredwavetoyx::curlfz.maxabs
+0	0.0000000000000000e+00	-1.3322676295501878e-15	1.3322676295501878e-15	0.0000000000000000e+00	0.0000000000000000e+00	4.9650683064945462e-16	8.0000000000000000e+00	2.4980018054066022e-16	4.9650683064945462e-16	1.3322676295501878e-15
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-energy.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-energy.tsv
new file mode 100644
index 000000000..78845fb34
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-energy.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::eps.min	4:staggeredwavetoyx::eps.max	5:staggeredwavetoyx::eps.sum	6:staggeredwavetoyx::eps.avg	7:staggeredwavetoyx::eps.stddev	8:staggeredwavetoyx::eps.volume	9:staggeredwavetoyx::eps.L1norm	10:staggeredwavetoyx::eps.L2norm	11:staggeredwavetoyx::eps.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	6.0000000000000000e+00	1.2000000000000000e+01	1.5000000000000000e+00	1.5909902576697319e+00	8.0000000000000000e+00	1.5000000000000000e+00	2.1866069605669876e+00	6.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fxerror.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fxerror.tsv
new file mode 100644
index 000000000..d4b64fec1
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fxerror.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::fx_err.min	4:staggeredwavetoyx::fx_err.max	5:staggeredwavetoyx::fx_err.sum	6:staggeredwavetoyx::fx_err.avg	7:staggeredwavetoyx::fx_err.stddev	8:staggeredwavetoyx::fx_err.volume	9:staggeredwavetoyx::fx_err.L1norm	10:staggeredwavetoyx::fx_err.L2norm	11:staggeredwavetoyx::fx_err.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fxrhs.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fxrhs.tsv
new file mode 100644
index 000000000..0863832fb
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fxrhs.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::fx_rhs.min	4:staggeredwavetoyx::fx_rhs.max	5:staggeredwavetoyx::fx_rhs.sum	6:staggeredwavetoyx::fx_rhs.avg	7:staggeredwavetoyx::fx_rhs.stddev	8:staggeredwavetoyx::fx_rhs.volume	9:staggeredwavetoyx::fx_rhs.L1norm	10:staggeredwavetoyx::fx_rhs.L2norm	11:staggeredwavetoyx::fx_rhs.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fxstate.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fxstate.tsv
new file mode 100644
index 000000000..97e16a1b7
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fxstate.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::fx.min	4:staggeredwavetoyx::fx.max	5:staggeredwavetoyx::fx.sum	6:staggeredwavetoyx::fx.avg	7:staggeredwavetoyx::fx.stddev	8:staggeredwavetoyx::fx.volume	9:staggeredwavetoyx::fx.L1norm	10:staggeredwavetoyx::fx.L2norm	11:staggeredwavetoyx::fx.maxabs
+0	0.0000000000000000e+00	-2.8284271247461903e+00	2.8284271247461903e+00	4.1633363423443370e-17	5.2041704279304213e-18	1.0823922002923940e+00	8.0000000000000000e+00	7.2855339059327384e-01	1.0823922002923940e+00	2.8284271247461903e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fyerror.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fyerror.tsv
new file mode 100644
index 000000000..2656fb9e9
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fyerror.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::fy_err.min	4:staggeredwavetoyx::fy_err.max	5:staggeredwavetoyx::fy_err.sum	6:staggeredwavetoyx::fy_err.avg	7:staggeredwavetoyx::fy_err.stddev	8:staggeredwavetoyx::fy_err.volume	9:staggeredwavetoyx::fy_err.L1norm	10:staggeredwavetoyx::fy_err.L2norm	11:staggeredwavetoyx::fy_err.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fyrhs.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fyrhs.tsv
new file mode 100644
index 000000000..84eb30e15
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fyrhs.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::fy_rhs.min	4:staggeredwavetoyx::fy_rhs.max	5:staggeredwavetoyx::fy_rhs.sum	6:staggeredwavetoyx::fy_rhs.avg	7:staggeredwavetoyx::fy_rhs.stddev	8:staggeredwavetoyx::fy_rhs.volume	9:staggeredwavetoyx::fy_rhs.L1norm	10:staggeredwavetoyx::fy_rhs.L2norm	11:staggeredwavetoyx::fy_rhs.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fystate.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fystate.tsv
new file mode 100644
index 000000000..026741020
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fystate.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::fy.min	4:staggeredwavetoyx::fy.max	5:staggeredwavetoyx::fy.sum	6:staggeredwavetoyx::fy.avg	7:staggeredwavetoyx::fy.stddev	8:staggeredwavetoyx::fy.volume	9:staggeredwavetoyx::fy.L1norm	10:staggeredwavetoyx::fy.L2norm	11:staggeredwavetoyx::fy.maxabs
+0	0.0000000000000000e+00	-2.8284271247461903e+00	2.8284271247461903e+00	0.0000000000000000e+00	0.0000000000000000e+00	1.0823922002923940e+00	8.0000000000000000e+00	7.2855339059327384e-01	1.0823922002923940e+00	2.8284271247461903e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fzerror.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fzerror.tsv
new file mode 100644
index 000000000..6a46e50f0
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fzerror.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::fz_err.min	4:staggeredwavetoyx::fz_err.max	5:staggeredwavetoyx::fz_err.sum	6:staggeredwavetoyx::fz_err.avg	7:staggeredwavetoyx::fz_err.stddev	8:staggeredwavetoyx::fz_err.volume	9:staggeredwavetoyx::fz_err.L1norm	10:staggeredwavetoyx::fz_err.L2norm	11:staggeredwavetoyx::fz_err.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fzrhs.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fzrhs.tsv
new file mode 100644
index 000000000..b2da72ebc
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fzrhs.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::fz_rhs.min	4:staggeredwavetoyx::fz_rhs.max	5:staggeredwavetoyx::fz_rhs.sum	6:staggeredwavetoyx::fz_rhs.avg	7:staggeredwavetoyx::fz_rhs.stddev	8:staggeredwavetoyx::fz_rhs.volume	9:staggeredwavetoyx::fz_rhs.L1norm	10:staggeredwavetoyx::fz_rhs.L2norm	11:staggeredwavetoyx::fz_rhs.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fzstate.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fzstate.tsv
new file mode 100644
index 000000000..859f3b096
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-fzstate.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::fz.min	4:staggeredwavetoyx::fz.max	5:staggeredwavetoyx::fz.sum	6:staggeredwavetoyx::fz.avg	7:staggeredwavetoyx::fz.stddev	8:staggeredwavetoyx::fz.volume	9:staggeredwavetoyx::fz.L1norm	10:staggeredwavetoyx::fz.L2norm	11:staggeredwavetoyx::fz.maxabs
+0	0.0000000000000000e+00	-2.8284271247461903e+00	2.8284271247461903e+00	0.0000000000000000e+00	0.0000000000000000e+00	1.0823922002923940e+00	8.0000000000000000e+00	7.2855339059327373e-01	1.0823922002923940e+00	2.8284271247461903e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-uerror.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-uerror.tsv
new file mode 100644
index 000000000..724eeac3e
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-uerror.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::u_err.min	4:staggeredwavetoyx::u_err.max	5:staggeredwavetoyx::u_err.sum	6:staggeredwavetoyx::u_err.avg	7:staggeredwavetoyx::u_err.stddev	8:staggeredwavetoyx::u_err.volume	9:staggeredwavetoyx::u_err.L1norm	10:staggeredwavetoyx::u_err.L2norm	11:staggeredwavetoyx::u_err.maxabs	12:staggeredwavetoyx::ft_err.min	13:staggeredwavetoyx::ft_err.max	14:staggeredwavetoyx::ft_err.sum	15:staggeredwavetoyx::ft_err.avg	16:staggeredwavetoyx::ft_err.stddev	17:staggeredwavetoyx::ft_err.volume	18:staggeredwavetoyx::ft_err.L1norm	19:staggeredwavetoyx::ft_err.L2norm	20:staggeredwavetoyx::ft_err.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-urhs.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-urhs.tsv
new file mode 100644
index 000000000..c6fdc07aa
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-urhs.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::u_rhs.min	4:staggeredwavetoyx::u_rhs.max	5:staggeredwavetoyx::u_rhs.sum	6:staggeredwavetoyx::u_rhs.avg	7:staggeredwavetoyx::u_rhs.stddev	8:staggeredwavetoyx::u_rhs.volume	9:staggeredwavetoyx::u_rhs.L1norm	10:staggeredwavetoyx::u_rhs.L2norm	11:staggeredwavetoyx::u_rhs.maxabs	12:staggeredwavetoyx::ft_rhs.min	13:staggeredwavetoyx::ft_rhs.max	14:staggeredwavetoyx::ft_rhs.sum	15:staggeredwavetoyx::ft_rhs.avg	16:staggeredwavetoyx::ft_rhs.stddev	17:staggeredwavetoyx::ft_rhs.volume	18:staggeredwavetoyx::ft_rhs.L1norm	19:staggeredwavetoyx::ft_rhs.L2norm	20:staggeredwavetoyx::ft_rhs.maxabs
+0	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	-2.8117749006091440e+01	2.8117749006091444e+01	0.0000000000000000e+00	0.0000000000000000e+00	9.9411254969542817e+00	8.0000000000000000e+00	6.1819805153394647e+00	9.9411254969542817e+00	2.8117749006091444e+01
diff --git a/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-ustate.tsv b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-ustate.tsv
new file mode 100644
index 000000000..cb18d312b
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/norms/staggeredwavetoyx-ustate.tsv
@@ -0,0 +1,2 @@
+# 1:iteration	2:time	3:staggeredwavetoyx::u.min	4:staggeredwavetoyx::u.max	5:staggeredwavetoyx::u.sum	6:staggeredwavetoyx::u.avg	7:staggeredwavetoyx::u.stddev	8:staggeredwavetoyx::u.volume	9:staggeredwavetoyx::u.L1norm	10:staggeredwavetoyx::u.L2norm	11:staggeredwavetoyx::u.maxabs	12:staggeredwavetoyx::ft.min	13:staggeredwavetoyx::ft.max	14:staggeredwavetoyx::ft.sum	15:staggeredwavetoyx::ft.avg	16:staggeredwavetoyx::ft.stddev	17:staggeredwavetoyx::ft.volume	18:staggeredwavetoyx::ft.L1norm	19:staggeredwavetoyx::ft.L2norm	20:staggeredwavetoyx::ft.maxabs
+0	0.0000000000000000e+00	-1.0000000000000000e+00	1.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	3.5355339059327379e-01	8.0000000000000000e+00	2.1986043456039805e-01	3.5355339059327379e-01	1.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	8.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfx.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfx.it000000.x.tsv
new file mode 100644
index 000000000..653a0916d
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfx.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:curlfx
+0	0.0000000000000000e+00	0	0	-1	4	4	-1.2500000000000000e+00	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	0	4	4	-1.0000000000000000e+00	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	1	4	4	-7.5000000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	2	4	4	-5.0000000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	3	4	4	-2.5000000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	0.0000000000000000e+00	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	5	4	4	2.5000000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	6	4	4	5.0000000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	7	4	4	7.5000000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	8	4	4	1.0000000000000000e+00	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	9	4	4	1.2500000000000000e+00	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfx.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfx.it000000.y.tsv
new file mode 100644
index 000000000..39cfdf0e5
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfx.it000000.y.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:curlfx
+0	0.0000000000000000e+00	0	0	4	-1	4	0.0000000000000000e+00	-1.1250000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	0	4	0.0000000000000000e+00	-8.7500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	1	4	0.0000000000000000e+00	-6.2500000000000000e-01	1.2500000000000000e-01	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	2	4	0.0000000000000000e+00	-3.7500000000000000e-01	1.2500000000000000e-01	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	3	4	0.0000000000000000e+00	-1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	0.0000000000000000e+00	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	5	4	0.0000000000000000e+00	3.7500000000000000e-01	1.2500000000000000e-01	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	6	4	0.0000000000000000e+00	6.2500000000000000e-01	1.2500000000000000e-01	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	7	4	0.0000000000000000e+00	8.7500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	8	4	0.0000000000000000e+00	1.1250000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfx.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfx.it000000.z.tsv
new file mode 100644
index 000000000..1131312e0
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfx.it000000.z.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:curlfx
+0	0.0000000000000000e+00	0	0	4	4	-1	0.0000000000000000e+00	1.2500000000000000e-01	-1.1250000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	0	0.0000000000000000e+00	1.2500000000000000e-01	-8.7500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	1	0.0000000000000000e+00	1.2500000000000000e-01	-6.2500000000000000e-01	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	4	2	0.0000000000000000e+00	1.2500000000000000e-01	-3.7500000000000000e-01	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	4	3	0.0000000000000000e+00	1.2500000000000000e-01	-1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	0.0000000000000000e+00	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	5	0.0000000000000000e+00	1.2500000000000000e-01	3.7500000000000000e-01	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	4	6	0.0000000000000000e+00	1.2500000000000000e-01	6.2500000000000000e-01	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	4	7	0.0000000000000000e+00	1.2500000000000000e-01	8.7500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	8	0.0000000000000000e+00	1.2500000000000000e-01	1.1250000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfy.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfy.it000000.x.tsv
new file mode 100644
index 000000000..93d65daa3
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfy.it000000.x.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:curlfy
+0	0.0000000000000000e+00	0	0	-1	4	4	-1.1250000000000000e+00	0.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	0	4	4	-8.7500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	1	4	4	-6.2500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	2	4	4	-3.7500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	3	4	4	-1.2500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	5	4	4	3.7500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	6	4	4	6.2500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	7	4	4	8.7500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	8	4	4	1.1250000000000000e+00	0.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfy.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfy.it000000.y.tsv
new file mode 100644
index 000000000..7de58f2b4
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfy.it000000.y.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:curlfy
+0	0.0000000000000000e+00	0	0	4	-1	4	1.2500000000000000e-01	-1.2500000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	0	4	1.2500000000000000e-01	-1.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	1	4	1.2500000000000000e-01	-7.5000000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	2	4	1.2500000000000000e-01	-5.0000000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	3	4	1.2500000000000000e-01	-2.5000000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	5	4	1.2500000000000000e-01	2.5000000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	6	4	1.2500000000000000e-01	5.0000000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	7	4	1.2500000000000000e-01	7.5000000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	8	4	1.2500000000000000e-01	1.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	9	4	1.2500000000000000e-01	1.2500000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfy.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfy.it000000.z.tsv
new file mode 100644
index 000000000..7b65f97a7
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfy.it000000.z.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:curlfy
+0	0.0000000000000000e+00	0	0	4	4	-1	1.2500000000000000e-01	0.0000000000000000e+00	-1.1250000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	0	1.2500000000000000e-01	0.0000000000000000e+00	-8.7500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	1	1.2500000000000000e-01	0.0000000000000000e+00	-6.2500000000000000e-01	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	4	2	1.2500000000000000e-01	0.0000000000000000e+00	-3.7500000000000000e-01	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	4	3	1.2500000000000000e-01	0.0000000000000000e+00	-1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	5	1.2500000000000000e-01	0.0000000000000000e+00	3.7500000000000000e-01	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	4	6	1.2500000000000000e-01	0.0000000000000000e+00	6.2500000000000000e-01	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	4	7	1.2500000000000000e-01	0.0000000000000000e+00	8.7500000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	8	1.2500000000000000e-01	0.0000000000000000e+00	1.1250000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfz.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfz.it000000.x.tsv
new file mode 100644
index 000000000..b5e93cfc1
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfz.it000000.x.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:curlfz
+0	0.0000000000000000e+00	0	0	-1	4	4	-1.1250000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	0	4	4	-8.7500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	1	4	4	-6.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	2	4	4	-3.7500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	3	4	4	-1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	5	4	4	3.7500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	6	4	4	6.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	7	4	4	8.7500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	8	4	4	1.1250000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfz.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfz.it000000.y.tsv
new file mode 100644
index 000000000..c37f30c4a
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfz.it000000.y.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:curlfz
+0	0.0000000000000000e+00	0	0	4	-1	4	1.2500000000000000e-01	-1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	0	4	1.2500000000000000e-01	-8.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	1	4	1.2500000000000000e-01	-6.2500000000000000e-01	0.0000000000000000e+00	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	2	4	1.2500000000000000e-01	-3.7500000000000000e-01	0.0000000000000000e+00	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	3	4	1.2500000000000000e-01	-1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	5	4	1.2500000000000000e-01	3.7500000000000000e-01	0.0000000000000000e+00	-1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	6	4	1.2500000000000000e-01	6.2500000000000000e-01	0.0000000000000000e+00	1.3322676295501878e-15
+0	0.0000000000000000e+00	0	0	4	7	4	1.2500000000000000e-01	8.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	8	4	1.2500000000000000e-01	1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfz.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfz.it000000.z.tsv
new file mode 100644
index 000000000..c8ed8d5fd
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-curlfz.it000000.z.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:curlfz
+0	0.0000000000000000e+00	0	0	4	4	-1	1.2500000000000000e-01	1.2500000000000000e-01	-1.2500000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	0	1.2500000000000000e-01	1.2500000000000000e-01	-1.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	1	1.2500000000000000e-01	1.2500000000000000e-01	-7.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	2	1.2500000000000000e-01	1.2500000000000000e-01	-5.0000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	3	1.2500000000000000e-01	1.2500000000000000e-01	-2.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	5	1.2500000000000000e-01	1.2500000000000000e-01	2.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	6	1.2500000000000000e-01	1.2500000000000000e-01	5.0000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	7	1.2500000000000000e-01	1.2500000000000000e-01	7.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	8	1.2500000000000000e-01	1.2500000000000000e-01	1.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	9	1.2500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-energy.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-energy.it000000.x.tsv
new file mode 100644
index 000000000..c05d14efe
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-energy.it000000.x.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:eps
+0	0.0000000000000000e+00	0	0	-1	4	4	-1.1250000000000000e+00	1.2500000000000000e-01	1.2500000000000000e-01	1.9999999999999996e+00
+0	0.0000000000000000e+00	0	0	0	4	4	-8.7500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	5.9999999999999991e+00
+0	0.0000000000000000e+00	0	0	1	4	4	-6.2500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	5.9999999999999991e+00
+0	0.0000000000000000e+00	0	0	2	4	4	-3.7500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	1.9999999999999996e+00
+0	0.0000000000000000e+00	0	0	3	4	4	-1.2500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	2.0000000000000004e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	5.9999999999999982e+00
+0	0.0000000000000000e+00	0	0	5	4	4	3.7500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	5.9999999999999991e+00
+0	0.0000000000000000e+00	0	0	6	4	4	6.2500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	2.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	7	4	4	8.7500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	1.9999999999999996e+00
+0	0.0000000000000000e+00	0	0	8	4	4	1.1250000000000000e+00	1.2500000000000000e-01	1.2500000000000000e-01	5.9999999999999991e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-energy.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-energy.it000000.y.tsv
new file mode 100644
index 000000000..312fa0e9f
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-energy.it000000.y.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:eps
+0	0.0000000000000000e+00	0	0	4	-1	4	1.2500000000000000e-01	-1.1250000000000000e+00	1.2500000000000000e-01	1.9999999999999996e+00
+0	0.0000000000000000e+00	0	0	4	0	4	1.2500000000000000e-01	-8.7500000000000000e-01	1.2500000000000000e-01	5.9999999999999991e+00
+0	0.0000000000000000e+00	0	0	4	1	4	1.2500000000000000e-01	-6.2500000000000000e-01	1.2500000000000000e-01	5.9999999999999991e+00
+0	0.0000000000000000e+00	0	0	4	2	4	1.2500000000000000e-01	-3.7500000000000000e-01	1.2500000000000000e-01	1.9999999999999996e+00
+0	0.0000000000000000e+00	0	0	4	3	4	1.2500000000000000e-01	-1.2500000000000000e-01	1.2500000000000000e-01	2.0000000000000004e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	5.9999999999999982e+00
+0	0.0000000000000000e+00	0	0	4	5	4	1.2500000000000000e-01	3.7500000000000000e-01	1.2500000000000000e-01	5.9999999999999991e+00
+0	0.0000000000000000e+00	0	0	4	6	4	1.2500000000000000e-01	6.2500000000000000e-01	1.2500000000000000e-01	2.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	7	4	1.2500000000000000e-01	8.7500000000000000e-01	1.2500000000000000e-01	1.9999999999999996e+00
+0	0.0000000000000000e+00	0	0	4	8	4	1.2500000000000000e-01	1.1250000000000000e+00	1.2500000000000000e-01	5.9999999999999991e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-energy.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-energy.it000000.z.tsv
new file mode 100644
index 000000000..4cf31d70e
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-energy.it000000.z.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:eps
+0	0.0000000000000000e+00	0	0	4	4	-1	1.2500000000000000e-01	1.2500000000000000e-01	-1.1250000000000000e+00	1.9999999999999996e+00
+0	0.0000000000000000e+00	0	0	4	4	0	1.2500000000000000e-01	1.2500000000000000e-01	-8.7500000000000000e-01	5.9999999999999991e+00
+0	0.0000000000000000e+00	0	0	4	4	1	1.2500000000000000e-01	1.2500000000000000e-01	-6.2500000000000000e-01	5.9999999999999982e+00
+0	0.0000000000000000e+00	0	0	4	4	2	1.2500000000000000e-01	1.2500000000000000e-01	-3.7500000000000000e-01	1.9999999999999996e+00
+0	0.0000000000000000e+00	0	0	4	4	3	1.2500000000000000e-01	1.2500000000000000e-01	-1.2500000000000000e-01	2.0000000000000004e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	1.2500000000000000e-01	1.2500000000000000e-01	5.9999999999999982e+00
+0	0.0000000000000000e+00	0	0	4	4	5	1.2500000000000000e-01	1.2500000000000000e-01	3.7500000000000000e-01	6.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	6	1.2500000000000000e-01	1.2500000000000000e-01	6.2500000000000000e-01	2.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	7	1.2500000000000000e-01	1.2500000000000000e-01	8.7500000000000000e-01	1.9999999999999996e+00
+0	0.0000000000000000e+00	0	0	4	4	8	1.2500000000000000e-01	1.2500000000000000e-01	1.1250000000000000e+00	5.9999999999999991e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxerror.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxerror.it000000.x.tsv
new file mode 100644
index 000000000..97f81566f
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxerror.it000000.x.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fx_err
+0	0.0000000000000000e+00	0	0	-1	4	4	-1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	0	4	4	-8.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	1	4	4	-6.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	2	4	4	-3.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	3	4	4	-1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	5	4	4	3.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	6	4	4	6.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	7	4	4	8.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	8	4	4	1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxerror.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxerror.it000000.y.tsv
new file mode 100644
index 000000000..ea41939aa
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxerror.it000000.y.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fx_err
+0	0.0000000000000000e+00	0	0	4	-1	4	1.2500000000000000e-01	-1.2500000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	0	4	1.2500000000000000e-01	-1.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	1	4	1.2500000000000000e-01	-7.5000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	2	4	1.2500000000000000e-01	-5.0000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	3	4	1.2500000000000000e-01	-2.5000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	5	4	1.2500000000000000e-01	2.5000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	6	4	1.2500000000000000e-01	5.0000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	7	4	1.2500000000000000e-01	7.5000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	8	4	1.2500000000000000e-01	1.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	9	4	1.2500000000000000e-01	1.2500000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxerror.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxerror.it000000.z.tsv
new file mode 100644
index 000000000..fcd62ab9b
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxerror.it000000.z.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fx_err
+0	0.0000000000000000e+00	0	0	4	4	-1	1.2500000000000000e-01	0.0000000000000000e+00	-1.2500000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	0	1.2500000000000000e-01	0.0000000000000000e+00	-1.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	1	1.2500000000000000e-01	0.0000000000000000e+00	-7.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	2	1.2500000000000000e-01	0.0000000000000000e+00	-5.0000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	3	1.2500000000000000e-01	0.0000000000000000e+00	-2.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	5	1.2500000000000000e-01	0.0000000000000000e+00	2.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	6	1.2500000000000000e-01	0.0000000000000000e+00	5.0000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	7	1.2500000000000000e-01	0.0000000000000000e+00	7.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	8	1.2500000000000000e-01	0.0000000000000000e+00	1.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	9	1.2500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxrhs.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxrhs.it000000.x.tsv
new file mode 100644
index 000000000..635c4940c
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxrhs.it000000.x.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fx_rhs
+0	0.0000000000000000e+00	0	0	-1	4	4	-1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	0	4	4	-8.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	1	4	4	-6.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	-0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	2	4	4	-3.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	3	4	4	-1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	5	4	4	3.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	6	4	4	6.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	7	4	4	8.7500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	8	4	4	1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxrhs.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxrhs.it000000.y.tsv
new file mode 100644
index 000000000..c95eafade
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxrhs.it000000.y.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fx_rhs
+0	0.0000000000000000e+00	0	0	4	-1	4	1.2500000000000000e-01	-1.2500000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	0	4	1.2500000000000000e-01	-1.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	1	4	1.2500000000000000e-01	-7.5000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	2	4	1.2500000000000000e-01	-5.0000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	3	4	1.2500000000000000e-01	-2.5000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	5	4	1.2500000000000000e-01	2.5000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	6	4	1.2500000000000000e-01	5.0000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	7	4	1.2500000000000000e-01	7.5000000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	8	4	1.2500000000000000e-01	1.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	9	4	1.2500000000000000e-01	1.2500000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxrhs.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxrhs.it000000.z.tsv
new file mode 100644
index 000000000..2dd11519c
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxrhs.it000000.z.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fx_rhs
+0	0.0000000000000000e+00	0	0	4	4	-1	1.2500000000000000e-01	0.0000000000000000e+00	-1.2500000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	0	1.2500000000000000e-01	0.0000000000000000e+00	-1.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	1	1.2500000000000000e-01	0.0000000000000000e+00	-7.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	2	1.2500000000000000e-01	0.0000000000000000e+00	-5.0000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	3	1.2500000000000000e-01	0.0000000000000000e+00	-2.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	4	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	5	1.2500000000000000e-01	0.0000000000000000e+00	2.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	6	1.2500000000000000e-01	0.0000000000000000e+00	5.0000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	7	1.2500000000000000e-01	0.0000000000000000e+00	7.5000000000000000e-01	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	8	1.2500000000000000e-01	0.0000000000000000e+00	1.0000000000000000e+00	0.0000000000000000e+00
+0	0.0000000000000000e+00	0	0	4	4	9	1.2500000000000000e-01	0.0000000000000000e+00	1.2500000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxstate.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxstate.it000000.x.tsv
new file mode 100644
index 000000000..5ff558a44
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxstate.it000000.x.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fx
+0	0.0000000000000000e+00	0	0	-1	4	4	-1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00	-1.1715728752538102e+00
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxstate.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxstate.it000000.y.tsv
new file mode 100644
index 000000000..16a26462e
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxstate.it000000.y.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fx
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxstate.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxstate.it000000.z.tsv
new file mode 100644
index 000000000..39b87f0cd
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fxstate.it000000.z.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fx
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyerror.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyerror.it000000.x.tsv
new file mode 100644
index 000000000..419ac007b
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyerror.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fy_err
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyerror.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyerror.it000000.y.tsv
new file mode 100644
index 000000000..ca590d8f0
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyerror.it000000.y.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fy_err
+0	0.0000000000000000e+00	0	0	4	-1	4	0.0000000000000000e+00	-1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
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+0	0.0000000000000000e+00	0	0	4	8	4	0.0000000000000000e+00	1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyerror.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyerror.it000000.z.tsv
new file mode 100644
index 000000000..681ddb84e
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyerror.it000000.z.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fy_err
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+0	0.0000000000000000e+00	0	0	4	4	9	0.0000000000000000e+00	1.2500000000000000e-01	1.2500000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyrhs.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyrhs.it000000.x.tsv
new file mode 100644
index 000000000..271df98bf
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyrhs.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fy_rhs
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+0	0.0000000000000000e+00	0	0	9	4	4	1.2500000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyrhs.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyrhs.it000000.y.tsv
new file mode 100644
index 000000000..c43ba4673
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyrhs.it000000.y.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fy_rhs
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+0	0.0000000000000000e+00	0	0	4	8	4	0.0000000000000000e+00	1.1250000000000000e+00	0.0000000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyrhs.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyrhs.it000000.z.tsv
new file mode 100644
index 000000000..f7d4e1eb2
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fyrhs.it000000.z.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fy_rhs
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+0	0.0000000000000000e+00	0	0	4	4	9	0.0000000000000000e+00	1.2500000000000000e-01	1.2500000000000000e+00	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fystate.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fystate.it000000.x.tsv
new file mode 100644
index 000000000..e7259edfb
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fystate.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fy
+0	0.0000000000000000e+00	0	0	-1	4	4	-1.2500000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00	8.2842712474618985e-01
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+0	0.0000000000000000e+00	0	0	9	4	4	1.2500000000000000e+00	1.2500000000000000e-01	0.0000000000000000e+00	8.2842712474618985e-01
diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fystate.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fystate.it000000.y.tsv
new file mode 100644
index 000000000..e8a949d9a
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fystate.it000000.y.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fy
+0	0.0000000000000000e+00	0	0	4	-1	4	0.0000000000000000e+00	-1.1250000000000000e+00	0.0000000000000000e+00	-1.1715728752538102e+00
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fystate.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fystate.it000000.z.tsv
new file mode 100644
index 000000000..9de019af1
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fystate.it000000.z.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fy
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzerror.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzerror.it000000.x.tsv
new file mode 100644
index 000000000..8745c2e9e
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzerror.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fz_err
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzerror.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzerror.it000000.y.tsv
new file mode 100644
index 000000000..8ceea9cc3
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzerror.it000000.y.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fz_err
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzerror.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzerror.it000000.z.tsv
new file mode 100644
index 000000000..e5ea18c9b
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzerror.it000000.z.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fz_err
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzrhs.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzrhs.it000000.x.tsv
new file mode 100644
index 000000000..972d0adc3
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzrhs.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fz_rhs
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzrhs.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzrhs.it000000.y.tsv
new file mode 100644
index 000000000..adfbfda64
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzrhs.it000000.y.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fz_rhs
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzrhs.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzrhs.it000000.z.tsv
new file mode 100644
index 000000000..64a9e37bb
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzrhs.it000000.z.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fz_rhs
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzstate.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzstate.it000000.x.tsv
new file mode 100644
index 000000000..9b1e1ef6b
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzstate.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fz
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzstate.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzstate.it000000.y.tsv
new file mode 100644
index 000000000..6e79ed10d
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzstate.it000000.y.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fz
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzstate.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzstate.it000000.z.tsv
new file mode 100644
index 000000000..b75b4513d
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-fzstate.it000000.z.tsv
@@ -0,0 +1,11 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:fz
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-uerror.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-uerror.it000000.x.tsv
new file mode 100644
index 000000000..40dabd9c0
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-uerror.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:u_err	12:ft_err
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-uerror.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-uerror.it000000.y.tsv
new file mode 100644
index 000000000..5a9fa50d7
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-uerror.it000000.y.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:u_err	12:ft_err
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-uerror.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-uerror.it000000.z.tsv
new file mode 100644
index 000000000..d1917d56f
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-uerror.it000000.z.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:u_err	12:ft_err
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-urhs.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-urhs.it000000.x.tsv
new file mode 100644
index 000000000..13b4840b0
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-urhs.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:u_rhs	12:ft_rhs
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-urhs.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-urhs.it000000.y.tsv
new file mode 100644
index 000000000..9545cc420
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-urhs.it000000.y.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:u_rhs	12:ft_rhs
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-urhs.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-urhs.it000000.z.tsv
new file mode 100644
index 000000000..fc250ea81
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-urhs.it000000.z.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:u_rhs	12:ft_rhs
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-ustate.it000000.x.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-ustate.it000000.x.tsv
new file mode 100644
index 000000000..2011dea98
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-ustate.it000000.x.tsv
@@ -0,0 +1,12 @@
+# 1:iteration	2:time	3:patch	4:level	5:i	6:j	7:k	8:x	9:y	10:z	11:u	12:ft
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-ustate.it000000.y.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-ustate.it000000.y.tsv
new file mode 100644
index 000000000..a200e2b50
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-ustate.it000000.y.tsv
@@ -0,0 +1,12 @@
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diff --git a/StaggeredWaveToyX/test/standing/staggeredwavetoyx-ustate.it000000.z.tsv b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-ustate.it000000.z.tsv
new file mode 100644
index 000000000..4d13a921c
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/staggeredwavetoyx-ustate.it000000.z.tsv
@@ -0,0 +1,12 @@
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+0	0.0000000000000000e+00	0	0	4	4	9	0.0000000000000000e+00	0.0000000000000000e+00	1.2500000000000000e+00	-7.0710678118654746e-01	0.0000000000000000e+00
diff --git a/StaggeredWaveToyX/test/standing/standing.par b/StaggeredWaveToyX/test/standing/standing.par
new file mode 100644
index 000000000..c7b9a407d
--- /dev/null
+++ b/StaggeredWaveToyX/test/standing/standing.par
@@ -0,0 +1,53 @@
+ActiveThorns = "
+    CarpetX
+    IOUtil
+    ODESolvers
+    StaggeredWaveToyX
+"
+
+$out_every = 16
+
+Cactus::cctk_show_schedule = no
+Cactus::presync_mode = "mixed-error"
+
+CarpetX::poison_undefined_values = yes
+
+CarpetX::ncells_x = 8
+CarpetX::ncells_y = 8
+CarpetX::ncells_z = 8
+
+CarpetX::periodic_x = yes
+CarpetX::periodic_y = yes
+CarpetX::periodic_z = yes
+
+Cactus::cctk_itlast = 10
+
+StaggeredWaveToyX::initial_condition = "standing wave"
+
+ODESolvers::method = "RK3"
+
+IO::out_dir = $parfile
+IO::out_every = $out_every
+
+CarpetX::out_metadata = no
+CarpetX::out_norm_vars = "all"
+CarpetX::out_norm_omit_unstable = yes
+
+CarpetX::out_tsv_vars = "
+    StaggeredWaveToyX::ustate
+    StaggeredWaveToyX::fxstate
+    StaggeredWaveToyX::fystate
+    StaggeredWaveToyX::fzstate
+    StaggeredWaveToyX::urhs
+    StaggeredWaveToyX::fxrhs
+    StaggeredWaveToyX::fyrhs
+    StaggeredWaveToyX::fzrhs
+    StaggeredWaveToyX::curlfx
+    StaggeredWaveToyX::curlfy
+    StaggeredWaveToyX::curlfz
+    StaggeredWaveToyX::energy
+    StaggeredWaveToyX::uerror
+    StaggeredWaveToyX::fxerror
+    StaggeredWaveToyX::fyerror
+    StaggeredWaveToyX::fzerror
+"