The innovative design of DARPA’s Space Surveillance Telescope (SST) allows for a short focal length, wide field of view, and a compact optical train. The SST’s mirrors are some of the steepest aspherical curvatures ever to be polished and allow the telescope to have the fastest optics of its aperture class. These features combine to provide orders of magnitude improvements in deep space surveillance.
DARPA’s Space Surveillance Telescope: How It Works
