Specifically, I have EO and SAR sensors performing access to the same target(s). The EO sensor is constrained to the target being lit (e.g. Target object constrained to direct sun or penumbra), but the SAR sensor has no such constraint. Thus putting the constraint on the Target prevents the SAR sensor from having valid access. I see two ways around this: (1) duplicate every Target, one with the Lighting constraint and one without, or (2) move the constraint to the Sensor, where it really belongs, and indirectly figure out whether sunlight is falling on the Target, which to me seems to be the Sun Elevation Angle. Is that a valid approach? When I turn that constraint on, is it really giving me the sun elevation angle at the ground target (as illustrated in the Help), or at the sensor/parent object?

What I’ve done in a scenario which seems to get pretty close is to build a satellite with a sensor, and a target that it passes over in daylight and nighttime. I turned the Lighting constraint on and off to make sure that it constrained some of the accesses, then instead put a Min Sun Elevation Angle of 0 deg. to see that it did the same thing. It wasn’t exact, but it was very close, and I suspect the difference was due to the shape of the spheroid.