You did say radar… Anyway, good look snapping a picture of a ~20m jet travelling almost at mach1 from at least 500km away with a camera that is on a fixed orbit so you dont control where it is at a particular time. (and even if you did unless you took a picture of it during take off, that also wouldnt tell you where it was flying from.)
This comment only makes sense if you disregard entirely detection by satellite image.
You did say radar… Anyway, good look snapping a picture of a ~20m jet travelling almost at mach1 from at least 500km away with a camera that is on a fixed orbit so you dont control where it is at a particular time. (and even if you did unless you took a picture of it during take off, that also wouldnt tell you where it was flying from.)
???
https://www.planet.com/pulse/aircraft-detection-at-planetary-scale
Notice how those are on the ground, at a known location (an airbase), so a photo can be planned for in advance.
They are decidedly not fast jets travelling on an attack mission at close to the speed of sound.