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There are some mission profiles that simply don't work from orbit. You need too much resolution and frame rate.

https://en.wikipedia.org/wiki/ARGUS-IS

Imagine implementing the above from LEO.

So you have these LEO Internet satellite constellations with thousands of satellites that have a number of satellites above any place on Earth at any given moment...

The optical system required to achieve this is infeasible to deploy at the scale required to compensate for concerns like orbital motion at 15+ fps.

Yeah, that would be the main issue for optical imaging. Still rapid change detection could be doable and of course sigint.

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