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A comment on Photos of a KH-12 Kennan Keyhole Secret Military Spy Satellite (2013). Parent comment

Re:Photos of a KH-12 Kennan Keyhole Secret Military Spy Sate... by micah94 on Tuesday December 14, 2021 @05:04PM (#29558648)
Doubtful, I think Webb only sees in the infrared. Looking at the earth would blind it. This is why it'll be a million miles away protected by a fancy heat shield.
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Re:Photos of a KH-12 Kennan Keyhole Secret Military Spy Sate... by BrazzVuvuzela on Tuesday December 14, 2021 @05:38PM (#29559095)
> Looking at the earth would blind it

Wouldn't that depend on how much dynamic range it has? Webb is intended to look at very dim signals in space so Earth would blind it, but if a spy-Webb were intended to track rocket or jet engines, things quite hotter than the rest of earth, perhaps it might be capable of that?

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