OVERVIEW: Long-Range Air-Defense Search Radar in the States of the former Warsaw pact. Germany used modified version from 1990 onwards.

DETAILS: 

NOTES:  Beacon, the antenna of the secondary radar unit “Siemens 1990”, a modification, which was introduced in the new german federal states after 1991. It replaced the old russian interrogation system. Cince 1998 the last P 37 were replaced by the RRP-117 in Mecklenburg/Western Pomerania.

SOURCES:  Radartutorial http://www.radartutorial.eu/19.kartei/karte911.en.html