How much spacecraft time can a snapshot observation take?
Snaps in single orbits that propose to fill the entire visibility period may SOMETIMES schedule, but will frequently not. That’s because the “holes” for snaps are frequently partly impacted by the SAA, or shortened by SI reconfiguration warmup times, or by a GS acq for the next orbit, etc. The result is that snaps longer than 30 min are less likely to schedule, and are decreasingly likely the longer they are. Thus a program that relies on obtaining 60 minute snaps is very unlikely to be successful. This is the origin of the recommendation that snaps be short. See Section 2.2 of the Call for Proposals for a more detailed discussion for SNAPshots.
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