alt Hacker NewsBreak out the pocket book and pay Planet Labs to do it. You could do it with much less frequent visits than this probably the search area for it every 2 hours isn't very large and image recognition systems are pretty good. The big threat is cloud cover.
https://www.planet.com/pulse/12x-rapid-revisit-announcement/
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matkoniecz • yesterday at 6:10 PM
What if US government bans US-based companies from selling pictures within area where carrier operates?
(of all "national security" reasons these is one of more reasonable ones)
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Note that that article is from 2020. Nowadays the frequency is actually down to 90 minutes/1.5hr. The resolution is up as well and they can do massive image capture (~500km^2) and video (120sec stream) from their passes.
Also nowadays they provide multi-spectal capture as well which can mostly see through cloud cover even if it takes a bit more bandwidth and postprocessing.