Unexpected "nan" in caminfo output

dpmayerUSGS commented 3 years ago

ISIS version(s) affected: >=3.10.2

Description
caminfo produces values of "nan" for the SubSpacecraftGroundAzimuth, ParallaxX, and ParallaxY keywords on certain images, even though caminfo is still able to compute other angles and even project a footprint onto the target body. I have only found this to affect specific MOC EDRs, THEMIS IR EDRs, and THEMIS VIS EDRs.

How to reproduce

moc2isis/thm2isis from=infile to=outfile.cub    #program depends on which image being input, obvs 
spiceinit from=outfile.cub
caminfo from=outfile.cub to=outfile_caminfo.pvl geometry=yes isislabel=yes statistics=yes camstats=yes polygon=yes inctype=vertices numvertices=40

grep "nan" outfile_caminfo.pvl
#    SubSpacecraftGroundAzimuth = nan
#    ParallaxX                  = nan
#    ParallaxY                  = nan

jessemapel commented 3 years ago

@dpmayerUSGS We have a little bit of support time slotted right now. We're primarily focusing on various clean-up issues. Is this a high priority issue for PDS-Pipelines or can it wait until the full support sprint in June?

dpmayerUSGS commented 3 years ago

@jessemapel It is impacting PDS project work, so sooner is better than later. I have no idea how simple/difficult it will be to fix this (because I have no idea what's causing it), so I can't speak to whether it makes more sense to tackle during a cleanup sprint or the full support sprint in June.

jessemapel commented 3 years ago

It sounds like we should slot it now and at least get an idea of how much there is here @acpaquette

acpaquette commented 3 years ago

@jessemapel Sounds good. The only issue is that this is going into ISIS 5.0.1 and I know that @dpmayerUSGS is on an older version of ISIS. Should we be planning to back port a potential fix?

jessemapel commented 3 years ago

Let's see how big the fix is before we do that. The ISIS 3 development and testing environment is quite old and may not be fully functionally anymore.

DOI-USGS / ISIS3

Unexpected "nan" in caminfo output #4393