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| Country of origin | Soviet Union |
|---|---|
| Introduced | 1968 |
| No. built | 11 |
| Type | Early Warning |
| Frequency | VHF |
| Range | 2300 km |
| Altitude | 160 km |
| Azimuth | 360 degrees |
| Elevation | 20 degrees |
| Power | 17 MW 20 kW average |
TheP-70 or "Lena-M" was a static 2DVHFradar developed and operated by the formerSoviet Union.
The P-70 early warning radar started development in 1960[1] and was completed in 1968 when the radar completed state testing and was accepted into service.[2] The purpose of the radar was to provide long-range early warning of aircraft over the vast territory of the Soviet Union in support of long-range missile batteries. The P-70 was developed by the SKB Design Bureau, a division of State Plant No. 197 named afterV.I.Lenin, the predecessor of the currentNizhniy Novgorod Research Institute of Radio Engineering (NNIIRT).[2] The P-70 had a production run of 11[3] radar units which were deployed to many different regions within the Soviet Union includingEstonia, Kotlas,Lithuania and Rybachy Peninsula in the north-west, Kerch, the North-East Bank andAzerbaijan in the south,Mongolia and Russian Island in the east and Anadyr in the north-east.[1]
The P-70 radar was designed as a static structure mounted on a two-story building which housed the radar and power supply equipment as well as facilities for the radar operators.
Additional support facilities could be operated up to 2 km from the radar building.[1]
The radar used a single large antenna accomplishing bothtransmission and reception with a surface area of 850 m2 and with dimensions of 48 by 25 meters.[1] The antenna was of the open-frame truncatedparabolic variety and was scanned mechanically in azimuth usinghydraulics.
P-70 radars were dual-channel, with the antenna working in both horizontal and verticalpolarization. The radar was one of the first mass-produced radars to usepulse compression.[3] The use of these techniques gave the P-70 excellent resolution (by a factor of 10 compared with theP-14[1]) at long range, as well providing protection against active and passive interference. The radar operated at tworepetition frequencies, 140 Hz to observe low-altitude targets (aircraft and missiles) and 70 Hz to observe high-altitude targets (satellites). The P-70 also used a fully coherent transmitter and anMTI system capable of compensating for wind and other forms of passive interference such as chaff. Overall, the P-70 managed to achieve a low false alarm rate.[1]
The P-70 radar was operated by the Soviet Union from 1968. The radars were not exported and are believed to be no longer in operation.[3]
Soviet Union - Passed to successor states.