GPA-30

GPA-30 Long Range Search Radar Video Mapper Set - A Long-Range Search Radar Video Mapper set built by ????. This mapper produces a video map outline of the radar set coverage area that is synchronized with the radar video sweep and rotation and displays this map outline on up to 12 plan position indicators (PPI) associated with the search radar. The GPA-30 generates the video map from an opaque film negative of the territory surrounding the radar site. The maps used are circular with the radar site at the center; the range of the map corresponds to the max range of the search radar displays. The map video is mixed with the video signals from acquired targets, permitting the operators to locate the position of a radar target with respect to a point on the earth's surface. GPA-30 Search Radar Video Mapper Element Value Notes Nomenclature GPA-30 Origins Variants Manufacturer Type Search Radar Video Mapper Number Made Range 10-350 naut mil Rotational Speed 0-20 rpm Set by host radar PRF 150-2000 pps Set by host radar Resolution 1600 lines Sweep Speeds 100, 500, 1000, 2000, 5000, 50,000 usec Video Bandwidth 4 mc Mapping Ranges 10 to 30 mi 25 to 100 mi 75 to 299mi 150 to 350 mi Range Accuracy plus or minus 1 pct Azimuth Accuracy plus or minus 15 min Power 120 vac, 60 cps, single phase, 960 w GPA-30 Mapper See Also: US Video Mapper Sets Sources: Winkler, David F., Searching the Skies: the Legacy of the United States Cold War Defense Radar Program, USAF Hq Air Combat Command, 1997, 192 pages, Pdf MIL-HDBK-162A, 15 Dec 1965. Links: