How to calculate photometric angles in ISIS3 for ShadowCam images

[99YyLi]

I'm working with ShadowCam images and need to calculate photometric angles (ignoring secondary illumination effects) using ISIS3. However, I don't have access to the SPICE data or the camera model for ShadowCam.

Specifically, I need to calculate:

Incidence angle: the angle between the solar vector and the surface normal
Emission angle: the angle between the surface normal and the observation vector

I plan to use a specific DEM for this calculation. Could someone guide me on how to achieve this in ISIS3, given the lack of SPICE and camera data?

[dpmayerUSGS]

Unfortunately, there isn't a way to do this in ISIS because of the lack of SPICE data or a camera model for ShadowCam.

Outside of ISIS, you may be able to estimate the solar incidence angle at each pixel by using data from a ShadowCam observations PDS label to figure out when each pixel was acquired, then compare this to the latitude and longitude of each pixel in the map-projected ShadowCam products, and then use SPICE kernels of the Moon's position to compute a solar vector, but this would not be very accurate and wouldn't allow you to use your own DEM (the map-projected ShadowCam products are already orthorectified).

The KASI website says that SPICE kernels for the KPLO mission are "Coming Soon," so you could try contacting them to ask when they expect to release the SPICE data.

[Kelvinrr]

I sent an email to the Intuitive Machines folk citing this issue about the Shadow Cam contributions as well in December. From what I understand they have this capability that needs to be reintegrated in the public ISIS repo. Waiting to hear back.