The Physics Factbook ™ Edited by Glenn Elert -- Written by his students An educational, Fair Use website topic index | author index | special index Bibliographic Entry Result (w/surrounding text) Standardized Result Massive New Top Secret Spy-Satellite Program to Cost up to $25 Billion . Los Angeles Times . 7 June 2001. "Declassified documents say the NRO launched 145 Corona satellites, each of which flew a few days at a time taking photographs with six- to 10-foot resolutions, compared with resolution of approximately six inches on current satellites." 180–300 cm 15 cm Satellites System Overview Articles. America Online: Path: Spy Satellites. "Air force and CIA Discoverer 13 Series Spy Satellites 12 Inch Res" 30 cm "Type KH-11 Spy Satellites, 10 cm/4 inch resolution." 10 cm "KH-7 -1966 2" Resolution" 5 cm Bennett, Andrew A. Autonomous Mapping With an AUV ...