N-21, N-22

The N-22 is a self-propelled, tactical 2D air surveillance radar operating in the S-band (IEEE designation) or E/F-band (NATO designation). It serves as a short to medium-range air defense radar, capable of gap-filler operations up to an altitude of 7,000 meters, with an instrumented range of 100 km and an accuracy of 100 meters and 0.2 degrees. The radar provides target information to low-level air defense systems, such as the Russian 9K33 Osa (NATO SA-8 “Gecko”) surface-to-air missile system, and features an antenna with a 4.2 × 3.1 meter parabolic reflector that produces a cosecant-squared pattern, rotating at 12 or 24 rpm. Manufactured by RADWAR (now PITRADWAR) of Poland since the mid-1990s, the N-22 is mounted on a modified Tatra 815 8×8 chassis with an armored cab and an elevatable mast. Its predecessor, the N-21, produced since the late 1980s, utilized the same antenna and employed an amplitron power amplifier driven by an LO-301M traveling wave tube, with both systems operating at a pulse repetition frequency of 1,000 Hz, a pulsewidth of 10 µs, and a peak power of 90 kW.

radartutorial.eu: https://www.radartutorial.eu/19.kartei/02.surv/karte049.en.html