embedded_hiker
Joined 6 years ago
Karma
79
Submissions
36
Member since
Sep 30
Joined 6 years ago
Strangely, I don't get much nostalgia from this. The situation kind of sucked.
https://airandspace.si.edu/collection-objects/gnomon-lunar-a...
Besides inertial navigation, they had a transponder that would echo back a continuous pseudorandom bit stream, and the delay gave a precise measurement of distance.