VRRVY
Description of the radar set, tactical-technical characteristics
Figure 1: VRRVY
Finland
| Specifications | |
|---|---|
| frequency: | S-Band |
| pulse repetition time (PRT): | |
| pulse repetition frequency (PRF): | 360 or 720 Hz |
| pulsewidth (τ): | 1 or 2 µs |
| receiving 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).