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VRRVY

Description of the radar set, tactical-technical characteristics

Figure 1: VRRVY

Figure 1: VRRVY

Specifications
frequency: S-Band
pulse repetition time (PRT):
pulse repetition frequency (PRF): 360 or 720 Hz
pulsewidth (τ): 1 or 2 µs
receive time:
dead time:
peak power: 400 kW
average power: 350 W
instrumented range: 300 km
range resolution:
accuracy:
beamwidth:
hits per scan:
antenna rotation: 2; 4 or 6 rpm
MTBCF:
MTTR:

VRRVY

VRRVY (Abbr. of Viestiväline, Radio, Radar, Valvonta ja Yleis, i.e: Communication, radio, radar, surveillance and miscellaneous) is a historical radar operating in the S-Band, which could be used both as a rotating surveillance radar and as a heightfinder radar.

The reflector antenna consists of two parts, the surface of which is made of thin rods. These rods are oriented so that the radar operates as a heightfinder radar when polarized vertically and as a rotating surveillance radar when polarized horizontally. For this purpose, the radiator is rotated 90° by an electromagnet. In the heightfinding mode the antenna swivels 4 or 8 times per second by 30° in the elevation.

The prototype was built in 1955. A total of 10 of these radars were built. One of them is still existing in the Air Force Museum of Finland (62°23'15.0" N   25°40'46.8" W).