Description of the radar set, tactical-technical characteristics
Figure 1: 1L117
|frequency:||2 695 … 3 115 MHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):||375 or 750 Hz|
|pulsewidth (τ):||1.2 µs|
|peak power:||5 × 700 kW|
|instrumented range:||450 km|
|range resolution:||125 m|
|hits per scan:|
|antenna rotation:||6 or 12 min⁻¹|
1L117 (NATO designator: „Big Bar”) is operating in S-Band long range 3-D air surveillance radar. It is a further development or a modification of the P-37 „Bar Lock” in the transistorized version of 1990.
While retaining the essential advantages of the P-37 radar systems, such as low price, reliability, simplicity and ease of operation, the system has been given new properties and improved technical data. A visual distinguishing feature is the upper antenna, which is turned clockwise by approximately 45°. This V-Beam method enables the height to be determined in the plotextractor which can automatically detect up to 200 targets.
The modification 1L117M uses a klystron as a transmitter output stage in contrast to its predecessor model (five magnetron transmitters). Thus this version became a fully coherent radar. Improvements include a more stable output signal and a higher subclutter visibility of 45 dB (instead of 25 dB).
- Manufacturers Leaflet