I would like to have this feature once the sky will be full of artificial satellites.
Motivation: Megaconstellations like Starlink will  soon complicate our hobby. It is already complicating it now, but we still can get rid of the satellite traces during stacking. But once there will be 10k+ satellites, it will be really challenging for the rejection algorithms and HW.
Possible solution: A constantly running process, that will automatically shut mechanical shutter of the camera, before a satellite enters Field of view and opens it again when the satellite leaves the FoV. For this to work, a part of the imaging rig must be a scope/camera that has wider FoV. It can be guiding scope/camera or a separate scope/camera setup. This scope/camera will point to the same location as the main imaging scope/camera. Image acquisition speed needs to be quite fast, e.g. 1-10 fps. Every frame will be analyzed in real time and if there is a trace from incomming satellite, it will calculate in which time the satellite will cross (enters and leaves) the FoV of the main imaging scope/camera. During this time, the shutter will be closed and no satellite's trace will be recorded.
Another possible way, how to know, when a satellite will cross the FoV is to have some updated list of possitions of the satellites. I know that this exist, but can not remember the name right now. For this option you don't need wide field scope/camera, but you need online connection to the internet (or at least possibility to download the most recent "satellite list" and then use it offline) is needed.

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