| Space-based Radar |
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| reconnaissance satellites of the united states | |
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Space-Based Radar ('''SBR''') is a proposed constellation of Active Radar Satellite s for the United States Department Of Defense . The SBR system would allow detection and tracking of Aircraft , ocean-going vessels (similar to the Soviet RORSAT program), and potentially land vehicles from space. This information would then be relayed to regional and national command centers, as well as E-10 MC2A airborne command posts. EARTH-OBSERVING RADARS Earth-observation radars typically are used for study of land-use, climate , and terrain height measurements. They often orbit in sun- Synchronous Orbit s so that diurnal variations of vegetation are ignored, allowing long-term variations to be more accurately measured. Some of the former and current earth-observing radars are
PLANETARY RADARS Cassini-Huygens radar Magellan Probe radar DEFENSE RADARS Lacrosse (satellite) Discoverer II was a proposed military space-based radar program initiated in February 1998 as a joint Air Force, DARPA , and NRO program. The concept was to provide high-range-resolution ground moving target indication (GMTI), as well as SAR imaging and high-resolution digital mapping. This program was cancelled by Congress in 2000. SBR is a less-ambitious version of Discoverer II. EXTERNAL LINKS
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