KH-9 Hexagon Mapping System
The lower-resolution KH-9 mapping system was devoted exclusively to gathering information for mapmaking and collected imagery from March 1973 to October 1980. Geodetic data, including precise geopositioning, elevation, and other information provided the Department of Defense with accurate point locations for air, sea, and ground operations. This system was also used for tactical and strategic weapons system planning and provided key cartographic information for DTED1 and 1:250,000 scale mapping.
The KH-9 mapping system was mounted on Hexagon satellites along with the KH-9 imaging system. The KH-9 imaging system provided up to 6-inch resolution images. However the KH-9 imaging system products have not been released for public use.
The KH-9 operated for up to 275 days, returning four canisters of photographic film per mission.
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