Description of the radar set, tactical-technical characteristics
Figure 1: AN/GMD-1
|frequency:||1 660 … 1 700 MHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):|
|instrumented range:||200 km|
|hits per scan:|
AN/GMD-1 (Radar wind set or Rawin set) is an operating in L-Band transportable radio direction finder which automatically tracks the radiosonde, tunes itself to the transmitted frequency, and records angles to the radiosonde at a maximum rate of 10 times each minute. Recordings of time versus progressive elevation and azimuth positions are later converted to wind speed and direction. Received radiosonde signals are detected, amplified, and transmitted to a separate piece of equipment, the radiosonde recorder, for conversion to atmospheric values of temperature, humidity and pressure.
The AN/GMD-1 uses a 7-ft paraboloid antenna with a passive conical scan (COSRO) tracking system. It was used in the 1950s.
(Functionally, it is not a radar, because it did not perform a runtime measurement. Nevertheless the system contains the term radar in the designation Rawin set).