SG radar

The SG radar was an American naval surface-search radar developed during the Second World War. The prototype was tested at sea aboard the destroyer USS Semmes in May 1941.[1] It was the first microwave surface-search radar to be equipped with a plan position indicator. The first operational set was installed aboard the heavy cruiser USS Augusta in April 1942.[2]

SG radar
SG (at the top of the mast) and SK-1 (below and to the left of the SG) radar antennas of USS Astoria
Country of originUnited States
Introduced1942
No. built955
TypeSurface-search radar
Frequency3 GHz
PRF775, 800, or 825
Beamwidth
  • 5.6° (horizontal)
  • 15° (vertical)
Pulsewidth1.3–2 μs
RPM4, 8, or 12
Range15 nmi (28 km; 17 mi)
Precision200 yd (180 m)
Power50 kW

Notes

  1. Watson, p. 212
  2. Friedman, p. 148

Bibliography

  • Brown, Louis (1999). A Radar History of World War II: Technical and Military Imperatives. Bristol and Philadelphia: Institute of Physics Publishing. ISBN 0-7503-0659-9.
  • Friedman, Norman (1981). Naval Radar. London: Conway Maritime Press. ISBN 0-85177-238-2.
  • Watson, Raymond C. Jr. (2009). Radar Origins Worldwide: History of Its Evolution in 13 Nations Through World War II. Trafford. ISBN 978-1-4269-2111-7.

Further reading

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