jessemapel
commented
5 years ago So both Galileo SSI and Voyager Camera use the label UTC StartTime keyword to set the image time. I'm not sure why it's trying to pull the location of Europa at the adjusted StartTime. campt is giving me this image time
(isis3.7.0) [jmapel@astrovm5 Galileo_DefaultSpice]$ campt from=s0449967752_53_54.cal.cub
campt: Working
Group = GroundPoint
Filename = s0449967752_53_54.cal.cub
Sample = 400.0
Line = 400.0
PixelValue = 0.97459984
RightAscension = 347.74502539248 <DEGREE>
Declination = -10.456877516855 <DEGREE>
PlanetocentricLatitude = 31.16753120247 <DEGREE>
PlanetographicLatitude = 31.268396801077 <DEGREE>
PositiveEast360Longitude = 216.84431229418 <DEGREE>
PositiveEast180Longitude = -143.15568770582 <DEGREE>
PositiveWest360Longitude = 143.15568770582 <DEGREE>
PositiveWest180Longitude = 143.15568770582 <DEGREE>
BodyFixedCoordinate = (-1069.0142357043, -801.01504076463,
807.96739329556) <km>
LocalRadius = 1561162.3363054 <meters>
SampleResolution = 27.820345920464 <meters/pixel>
LineResolution = 27.820345920464 <meters/pixel>
ObliqueDetectorResolution = 31.237994230144 <meters>
ObliquePixelResolution = 31.237994230144 <meters/pix>
ObliqueLineResolution = 31.237994230144 <meters>
ObliqueSampleResolution = 31.237994230144 <meters>
# Spacecraft Information
SpacecraftPosition = (-3460.3358786123, -2112.5161898026,
1061.0994881123) <km>
SpacecraftAzimuth = 273.59667515394 <DEGREE>
SlantDistance = 2739.0747198998 <km>
TargetCenterDistance = 4190.7733377817 <km>
SubSpacecraftLatitude = 14.666891772592 <DEGREE>
SubSpacecraftLongitude = 211.40383773726 <DEGREE>
SpacecraftAltitude = 2628.957812174 <km>
OffNadirAngle = 9.8151973680118 <DEGREE>
SubSpacecraftGroundAzimuth = 198.03112174133 <DEGREE>
# Sun Information
SunPosition = (-660411905.61591, -344856571.58107,
21278143.44734) <km>
SubSolarAzimuth = 273.93045688571 <DEGREE>
SolarDistance = 4.9822407717077 <AU>
SubSolarLatitude = 1.6359290724778 <DEGREE>
SubSolarLongitude = 207.5728460242 <DEGREE>
SubSolarGroundAzimuth = 198.32862960924 <DEGREE>
# Illumination and Other
Phase = 3.8479397512784 <DEGREE>
Incidence = 30.897597498792 <DEGREE>
Emission = 27.052114250909 <DEGREE>
NorthAzimuth = 73.533866141263 <DEGREE>
# Time
EphemerisTime = -50078911.264092 <seconds>
UTC = 1998-05-31T21:10:25.551
LocalSolarTime = 12.618097751332 <hour>
SolarLongitude = 4.0223032143138 <DEGREE>
# Look Direction Unit Vectors in Body Fixed, J2000, and Camera Coordinate Systems.
LookDirectionBodyFixed = (0.87303994503495, 0.47881174599207,
-0.09241518421447)
LookDirectionJ2000 = (0.96098292238366, -0.208737216207,
-0.18149544748318)
LookDirectionCamera = (-2.35922392732846e-16, -5.55111512312578e-17,
1.0)
End_Group
100% Processed
lwellerastro
ISIS version(s) affected: isis3.7.0
Description
Spiceinit fails while using spkwriter output for both Galileo SSI and Voyager 1 and 2 images of Europa.
How to reproduce
Create and spacecraft kernel for either/or a Galileo SSI or Voyager image of Europa and try applying it via spiceinit. I had originally done this for jigsaw bundled images, but it also fails on spiceinit-ed images, which is the easier case to reproduce.
Galileo example: Data directory: /work/users/lweller/Isis3Tests/SpkWriter/Galileo_DefaultSpice/
If I pass spiceinit the camera kernel without the spacecraft kernel, it runs successfully. When spiceinit is passed only the spacecraft kernel it fails in the same way above.
We must explicitly ask for the pck00010 kernel because spiceinit will apply pck00009 by default which contains old/outdated body information for Europa. I ran the same steps above using the default pck00009 kernel and got the same failures, so I don't think that has anything to do with the error.
Voyager example: Data Directory: /work/users/lweller/Isis3Tests/SpkWriter/Voyager_DefaultSpice/
This one also only fails on the spacecraft kernel.
In both cases of spkwriter I chose type=9 because a note in an old redmine post suggested this was the appropriate type for framers, but the documentation doesn't say. I did try type=13 for the Galileo image and it failed as well.
Possible Solution
Additional context
The reported time in the error message for each case is not the StartTime on the image labels and differs by 48 seconds for the Voyager data and 63 seconds for the Galileo data, which is about the difference between UTC and ET for at the time of data acquisition. This may be the problem, or something in addition to what is going on.
I believe this is the first time we have attempted to create kernels for Voyager and Galileo data.