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These satellite states are regularly updated with observations from the Space Surveillance Network, a globally distributed network of interferometer, radar and optical tracking systems. By the year 2001, the number of cataloged objects was nearly 20,000. [8] [9] [10] Different astrodynamics theories are used to maintain these catalogs.
Optical imaging surveillance Earth imaging satellites. Satellite images can be a survey or close-look telephoto. Corona is the earliest known. Spectral imaging is commonplace. Radar imaging surveillance Most space-based radars use synthetic-aperture radar. [citation needed] Can be used at night or through cloud cover. Earliest known are the ...
KH-8 GAMBIT-3 Photographic Payload Section KH-8 Photographic Payload Section. The Camera Optics Module of KH-8 consists of four cameras. The main camera of KH-8B (introduced in 1971) with a focal length of 175.6 in (4.46 m) is a single strip camera, designed to gather high-resolution images of ground targets. I
The recovery of the Discoverer 14 return capsule (typical for the CORONA series) A KH-4B CORONA satellite Discoverer 14 launch 1960, Thor Agena "A" launch vehicle. The CORONA [1] program was a series of American strategic reconnaissance satellites produced and operated by the Central Intelligence Agency (CIA) Directorate of Science & Technology with substantial assistance from the U.S. Air Force.
The first Misty satellite, USA-53, was released by the Space Shuttle Atlantis on mission STS-36 in 1990. The USA-144 satellite, launched on 22 May 1999 by a Titan IVB from Vandenberg Air Force Base may have been a second Misty satellite, [53] or an Enhanced Imaging System spacecraft. The satellites are sometimes identified as KH-12s.
The final KH-9 operated for 275 days. The satellite mass with and without the Mapping Camera System was 13,300 and 11,400 kg (29,300 and 25,100 lb), respectively. NRO intended to replace HEXAGON with ZEUS, later DAMON—HEXAGON's camera flown on the Space Shuttle—but DAMON was canceled in December 1980.
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