OVERVIEW:  The AN/APG-66(V)1  radar is an airborne LD/SD air-to-air, coherent, pulse-Doppler, medium-range fire-control radar operating in the H-to-low J band (NATO).

DETAILS: 
 The AN/APG-66(V)1 multimode airborne radar  has 13 operating modes. Four modes are for air-to-air operation (Downlook, Uplook, Air Combat and Automatic).  Nine modes are for air-to-surface operation (Mapping, Expanded, Doppler Beam Sharpening, Scan-Freeze, Freeze, Sea I, Sea II, Air-Ground Ranging, Beacon). 

The radar  has both "uplook" and "downlook" scanning capabilities. In uplook mode, the radar uses a low Pulse-Repetition Frequency (PRF) for medium- and high-altitude target detection in low clutter, while downlook mode uses medium PRF for target detection in heavy clutter environments. The primary air-combat mode is look-down. In that mode, the AN/APG-66(V)1  can detect a fighter-size plane at a range of up to 34.5 Nautical miles (55.6 kilometers). Four modes are available in air-to-air combat. In dogfight mode, the radar scans a 20 degrees x 20 degrees field. In high-g maneuvers, it scans a 40 degrees x10 degrees pattern.

ECM features include jamming resistant frequency agility as well as EMI pulse editor and fast phase shifting.


Specifications:

	Frequency:	6.2-10.9 GHz  H-to-low J band (NATO) C and X band (IEEE).
	PRF:		7.7-14.9 khz (est).
	Pulse width:	unknown
	Power: 		?? kW (scan); 21.5 kW (peak, approx) 
	Scan Limits:	±60° azimuth, ±60° degrees elevation.
	Range:		80 nm (max)
	Detection Ranges:	Tu-95  LU: 75nm; LD: 56nm (HtH geometry)
			MiG-25 LU:49nm; LD: 35nm (HtH geometry)
			MiG-23 LU: 40nm; LD: 29 nm (HtH geometry)
			F-4 LU: 40 nm; LD29 nm (HtH geometry)
			F-16 LD: 24 nm (HtH geometry)
			T-38 LU: 27 nm; LD: 19nm (HtH geometry)
			F-111 LD: 40nm (HtH geometry)
		
NOTES:  IOC June 1978.  Used in  F-16 A/B.    The AN/APG-66 is  capable of supporting AIM-7F/M Sparrow, AIM-9L/M Sidewinder, AIM-120A, Penguin, MICA and Skyflash E missiles.  The radar is a modular design, resulting in a mean time to repair of five minutes.



SOURCES: Jane's Radar and Electronic Warfare Systems 2002-2003, "AN/APG-66 multimode airborne radar" 11 February 2002 ; Proceedings of the IEEE, "Medium PRF for the AN/APG-66 Radar', Vol 73, No. 2, February 1985, pg. 300-311; Aerofax, "F-16" at page 113 (reproduction of General Dynamic table); 
"AN/APG-66 - Radartutorial." Grundlagen Der Radartechnik. Accessed September 8, 2024. https://www.radartutorial.eu/19.kartei/08.airborne/karte015.en.html. ; Pike, John. "AN/APG-66 Radar System." GlobalSecurity.org. Last modified July 7, 2011. https://www.globalsecurity.org/military/systems/aircraft/systems/an-apg-66.htm. ; Forecast International, "APG-66(V)" October 2003  