RSP-6M

The RSP-6M2 is a precision approach radar system designed for air traffic control within an airfield's control area, facilitating aircraft approaches to the runway in low visibility conditions down to a minimum altitude of 150-200 meters. It enables further approach to a decision height of 120 meters, with course and glide path correction commands transmitted via radiotelephony. Operating in the UHF band with a pulse repetition frequency of 500 Hz, a pulsewidth of 1.2 µs, and a peak power of 180 kW, the system has an instrumented range of 135 km and a range resolution of 400 m, with an accuracy of 200 m and 1° and a beamwidth of 2.5°. Both primary radar channels include an integrated secondary radar channel, sharing the same frequency band and main antenna, with coding similar to IFF-Standard Mark X but incorporating additional national time intervals for purposes such as sidelobe suppression and interference protection.

radartutorial.eu: https://www.radartutorial.eu/19.kartei/03.atc/karte059.en.html