Quote:
Originally Posted by kstar
Mike:
AFAIK, there at least three known "Hubble class" telescopes which are adapted to look down, not up - below says ground resolution is "probably 6 inches or better." |
Yes, they exist (but, the 6 inch resolution referenced seems vaguely familiar to something I posted...in this very thread...
)
I worked on a black (eh, maybe gray) project before I left Arizona. It was essentially a big telescope, built in a BIG vacuum chamber. Imaging satellites could be put in there, and the "telescope" would feed them images. It was to test the capabilities of the satellites. Our equipment had to be as good as or better than their satellites, or the testing would be useless.
The requirements were severe, but "they" came to us, because we could build it without much issue. The military isn't using magic, and their imagers still have to follow the same basic laws of Fourier optics.