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H2S was the first airborne, ground scanning radar system. It was developed for the Royal Air Force 's Bomber Command during World War II to identify targets on the ground for night and all-weather bombing.
Boeing SB-29 "Super Dumbo" with AN/APQ-13 radome between the nose landing gear and the airborne lifeboat The AN/APQ-13 radar was an American ground scanning radar developed by Bell Laboratories, Western Electric, and MIT as an improved model of the airborne H2X radar, itself developed from the first ground scanning radar, the British H2S radar.
FuG 350 Naxos & FuG 351 Korfu: This was a family or radar detectors that operated in the 8 to 12 cm band. They were primarily designed to locate Allied H2S radar transmissions. A range of antenna were used some stationary and some rotating. There were intended to be air, land and maritime versions.
FuG 224 Berlin A, and the contemporary FuG 240 Berlin N1 or Nachtjagd air interception radar, [1] [2] both made use of captured examples of the British cavity magnetron in the H2S radar. A H2S-equipped Short Stirling bomber had crashed near Rotterdam on the night of 2 February 1943. [3] This led to H2S being given the German codename Rotterdam ...
The long horizontal bar running between the aircraft's landing gear is the antenna for the Eagle radar. The AN/APQ-7 , or Eagle , was a radar bombsight system developed by the US Army Air Force . Early studies started in late 1941 under the direction of Luis Alvarez at the MIT Radiation Laboratory , but full-scale development did not begin ...
A National Weather Service technician monitors Hurricane Carla on a WSR-57 radar on Sept. 10, 1961. (NOAA) For more than 60 years, Hurricane Carla has been the benchmark for landfalling hurricanes ...
The use of TIs allowed the RAF to concentrate its advanced navigational systems in the Pathfinder units. Most widely used were the H2S ground scanning radar and Oboe navigation system, the former requiring considerable training to be useful, the latter able to guide only a single aircraft at a time. The limited number of navigational units ...
An object at height h above the ground and slant range R forms an angle α that can be calculated through sin α = h / R.By re-arrangement, R = h / sin α, or R = h csc α. The radar equation states that the signal received from an object, P e, varies inversely with the 4th power of range and directly as the square of the antenna gain, G, such that P e ~ G 2 / R 4.