SteppingHelixPropagator SHP covariance for q=0 #92
Description
there are no specific protections to q=0.
Needs some review.
Minimally, at least get rid of NaNs
Better yet, make it correct.
state propagation looks OK
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there are no specific protections to q=0.
Needs some review.
Minimally, at least get rid of NaNs
Better yet, make it correct.
state propagation looks OK