OVERVIEW:  The MR-710 aka Fregat-M2 aka TOP STEER radar is a shipborne 3-D air and surface search radar operating in the NATO E- band (IEEE S-Band).

DETAILS:  The Fregat is a family of 3D, 360-degree/full-coverage ship-based radar systems designed to provide surveillance and detection of surface and airborne targets and to deliver target designation data to weapon systems. 

The MR-710/TOP STEER is a 3-D frequency-scanning radar, backed by a 2D antenna that appears to be based on the MR-300/HEAD NET A radar.  These are two analog radar sets with common signal processing, whose transmitters operate in the upper (smaller antenna) and lower part of the used frequency band (larger antenna). The Fregat radar system can operate effectively in intense jamming and countermeasures environments. 


Specifications:

	Frequency:	2.0-2.5 GHz (E-band (NATO))
	PRF:		??
	Pulse width:	??
	Power: 		 30 kW (peak)
	Range:		81 nm (instrumented); 70 nm vs. fighter size targets 			(Fregat MAE); Radar Horizon for surface targets
			
NOTES:  IOC ???.  The radar received several modernizations, which were marked with the addition “…-M” and a sequential numbering.

SOURCES: Friedman, The Naval Institute Guide to World Naval Weapons Systems 1997-98, pg. 331-32 ; "Ancile." Ancile. Accessed May 23, 2022. https://www.deagel.com/Sensor%20Systems/Fregat/a001879. ;"MR-710 - Radartutorial." Grundlagen Der Radartechnik. Accessed May 23, 2022. https://www.radartutorial.eu/19.kartei/11.ancient4/karte021.en.html. ; Jane's Radar and Electronic Warfare Systems, "Top Steer surveillance radar," 02 July 2001; 


