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Description of the radar set, tactical-technical characteristics

Figure 1: Casta 2E1 is placed on two KAMAZ trucks

frequency: 830 … 882 MHz
pulse repetition time (PRT):
pulse repetition frequency (PRF):
pulsewidth (τ):
receiving time:
dead time:
peak power:
average power: 1 kW
instrumented range: 150 km
range resolution: 450 m
accuracy: 300 m ; 1.2°
hits per scan:
antenna rotation: 6 or 12 rpm

51U6 “Casta 2E1”

The “Casta 2E1” (Russian designators “51U6” - cyrillic: “51У6”, or “Kasta 2-1”) is a medium-range 2D air surveillance radar in the low-altitude range. It serves as a successor to the P-12 „Spoon Rest B” and P-15 “Flat Face A” radars. The radar has been developed for the detection of low-flying targets as well as aims with very low radar cross section (so-called: “Stealth targets”). The reflectors of the antenna are similar to those of the P-15 but the device is a complete new development. The antenna can be mounted on pylon with a height of 50 m (standard height of the antenna is 7 m) to increase the maximum range and the low-altitude radar coverage. The shelter with the operators workplace will be connected via cables and can be deposited in a distance up to 300 m. The system is characterized by high reliability, even under extreme climatic conditions.