diff --git a/parm/jcb-rdas/observations/atmosphere/abi_g16.yaml.j2 b/parm/jcb-rdas/observations/atmosphere/abi_g16.yaml.j2
index 63308d40..bd23bc5e 100644
--- a/parm/jcb-rdas/observations/atmosphere/abi_g16.yaml.j2
+++ b/parm/jcb-rdas/observations/atmosphere/abi_g16.yaml.j2
@@ -12,7 +12,7 @@
            write multiple files: {{write_multiple_files | default(false) }}
            engine:
              type: H5File
-             obsfile: jdiag_abi_g16.nc4
+             obsfile: jdiag_abi_g16.nc
          io pool:
            max pool size: {{ max_pool_size | default(1) }}
          simulated variables: [brightnessTemperature]
diff --git a/parm/jcb-rdas/observations/atmosphere/abi_g18.yaml.j2 b/parm/jcb-rdas/observations/atmosphere/abi_g18.yaml.j2
index 0483487a..ae2697f8 100644
--- a/parm/jcb-rdas/observations/atmosphere/abi_g18.yaml.j2
+++ b/parm/jcb-rdas/observations/atmosphere/abi_g18.yaml.j2
@@ -12,7 +12,7 @@
            write multiple files: {{write_multiple_files | default(false) }}
            engine:
              type: H5File
-             obsfile: jdiag_abi_g18.nc4
+             obsfile: jdiag_abi_g18.nc
          io pool:
            max pool size: {{ max_pool_size | default(1) }}
          simulated variables: [brightnessTemperature]
diff --git a/parm/jcb-rdas/observations/atmosphere/atms_n20.yaml.j2 b/parm/jcb-rdas/observations/atmosphere/atms_n20.yaml.j2
index 7e6cb25d..7afab231 100644
--- a/parm/jcb-rdas/observations/atmosphere/atms_n20.yaml.j2
+++ b/parm/jcb-rdas/observations/atmosphere/atms_n20.yaml.j2
@@ -10,7 +10,7 @@
            write multiple files: {{write_multiple_files | default(false) }}
            engine:
              type: H5File
-             obsfile: jdiag_atms_n20.nc4
+             obsfile: jdiag_atms_n20.nc
          io pool:
            max pool size: {{ max_pool_size | default(1) }}
          simulated variables: [brightnessTemperature]
diff --git a/parm/jcb-rdas/observations/atmosphere/atms_n21.yaml.j2 b/parm/jcb-rdas/observations/atmosphere/atms_n21.yaml.j2
index 1f7a471d..da42fef5 100644
--- a/parm/jcb-rdas/observations/atmosphere/atms_n21.yaml.j2
+++ b/parm/jcb-rdas/observations/atmosphere/atms_n21.yaml.j2
@@ -10,7 +10,7 @@
            write multiple files: {{write_multiple_files | default(false) }}
            engine:
              type: H5File
-             obsfile: jdiag_atms_n21.nc4
+             obsfile: jdiag_atms_n21.nc
          io pool:
            max pool size: {{ max_pool_size | default(1) }}
          simulated variables: [brightnessTemperature]
diff --git a/parm/jcb-rdas/observations/atmosphere/atms_npp.yaml.j2 b/parm/jcb-rdas/observations/atmosphere/atms_npp.yaml.j2
index 618be851..13b643b0 100644
--- a/parm/jcb-rdas/observations/atmosphere/atms_npp.yaml.j2
+++ b/parm/jcb-rdas/observations/atmosphere/atms_npp.yaml.j2
@@ -10,7 +10,7 @@
            write multiple files: {{write_multiple_files | default(false) }}
            engine:
              type: H5File
-             obsfile: jdiag_atms_npp.nc4
+             obsfile: jdiag_atms_npp.nc
          io pool:
            max pool size: {{ max_pool_size | default(1) }}
          simulated variables: [brightnessTemperature]
diff --git a/parm/jcb-rdas/observations/atmosphere/cris-fsr_n21.yaml.j2 b/parm/jcb-rdas/observations/atmosphere/cris-fsr_n21.yaml.j2
index c63bfe06..8ae4df0a 100644
--- a/parm/jcb-rdas/observations/atmosphere/cris-fsr_n21.yaml.j2
+++ b/parm/jcb-rdas/observations/atmosphere/cris-fsr_n21.yaml.j2
@@ -3,7 +3,7 @@
          obsdatain:
            engine:
              type: H5File
-             obsfile: data/obs/ioda_crisf4_n20.nc
+             obsfile: data/obs/ioda_crisf4_n21.nc
              missing file action: "warn"
          obsdataout:
            empty obs space action: "{{empty_obs_space_action}}"