The SD radar was an early form of radar developed by the United States Naval Research Laboratory between 1940 and 1941. It was installed on submarines to provide warning of enemy aircraft. Its omnidirectional antenna, however, prevented it from being able to provide bearing information, and it was used as a proximity radar.[2] Its range was directly affected by the aircraft's size and altitude. Large aircraft with an altitude above 1000 feet AGL could be detected between twelve and twenty miles, and small aircraft at the same altitude between eight and fifteen miles, while aircraft flying lower could avoid detection altogether.[3] Another disadvantage was the enemy's ability to use the SD radar signal to locate and target submarines, leading submarine commanders to only use the SD radar intermittently so as not to disclose their location.[5]
SD radar
Various masts and equipment of the USS Sculpin in 1943. The SD radar mast in designated as item 10.
^List of Naval Radio, Radar, and Sonar Equipment Arranged by Navy Model Letters(PDF). Washington D.C.: US Navy. January 1945. p. 106.
^ abcdefGebhard, Louis A. (1979). Evolution of Naval Radio-Electronics and Contributions of the Naval Research Laboratory. Washington, D.C.: Naval Research Laboratory. p. 186. Retrieved 13 July 2021.
^ abcRadar Operator's Manual. United States Navy. 1944. p. 266. Retrieved 13 July 2021.
radar, early, form, radar, developed, united, states, naval, research, laboratory, between, 1940, 1941, installed, submarines, provide, warning, enemy, aircraft, omnidirectional, antenna, however, prevented, from, being, able, provide, bearing, information, us. The SD radar was an early form of radar developed by the United States Naval Research Laboratory between 1940 and 1941 It was installed on submarines to provide warning of enemy aircraft Its omnidirectional antenna however prevented it from being able to provide bearing information and it was used as a proximity radar 2 Its range was directly affected by the aircraft s size and altitude Large aircraft with an altitude above 1000 feet AGL could be detected between twelve and twenty miles and small aircraft at the same altitude between eight and fifteen miles while aircraft flying lower could avoid detection altogether 3 Another disadvantage was the enemy s ability to use the SD radar signal to locate and target submarines leading submarine commanders to only use the SD radar intermittently so as not to disclose their location 5 SD radarVarious masts and equipment of the USS Sculpin in 1943 The SD radar mast in designated as item 10 Country of originUnited StatesManufacturerRCA Victor Division of RCA 1 DesignerUS Naval Research Laboratory 2 Introduced1941 2 No built400 2 Frequency114 MHz 2 PRF60 HzBeamwidth40 horizontal Pulsewidth8 5 µsRPM4Range20 mi 32 km 3 Altitude1 000 ft 300 m 3 Azimuth360ºPrecision450 m 1 480 ft 4 Power100 kw SD 5 130 kw 2 See also editSJ radarReferences edit List of Naval Radio Radar and Sonar Equipment Arranged by Navy Model Letters PDF Washington D C US Navy January 1945 p 106 a b c d e f Gebhard Louis A 1979 Evolution of Naval Radio Electronics and Contributions of the Naval Research Laboratory Washington D C Naval Research Laboratory p 186 Retrieved 13 July 2021 a b c Radar Operator s Manual United States Navy 1944 p 266 Retrieved 13 July 2021 SD Radar Tutorial Retrieved 14 July 2021 Lockwood Charles A 1951 Sink Em All 2nd ed New York E P Dutton amp Co p 204 ISBN 1258432366 Retrieved 13 July 2021 nbsp This United States Navy article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title SD radar amp oldid 1121273420, wikipedia, wiki, book, books, library,
