OVERVIEW: The AN/SPQ-9B aka "spook nine" is a short-range, pulse-Doppler, 2-D, surface search and fire control radar operating in the NATO I band.

DETAILS: The AN/SPQ-9B is an I-Band, pulse Doppler, frequency agile radar designed specifically for the littoral environment. The radar scans out to the horizon and performs simultaneous and automatic air and surface target detection and tracking of low flying subsonic and supersonic ASCMs, surface threats and low/slow flying aircraft, UAVs and helicopters. It has a very high clutter improvement factor supporting a very low false track rate in the littorals and in high clutter environments.

The AN/SPQ-9B antenna provides for three beams. If an air target is detected in the main beam, two look-back beams provide confirmation and track promotion resulting in “single-scan track” disclosure to a ship’s weapon system.


Specifications:

Frequency (active): 		 8-12.5 GHz (I Band (NATO), X Band (IEEE))
Power output: 		18 kW (peak); 
PRF:			3000 pps (avg)
Pulsewidth: 		0.1-8 µs 	
Range: 	 		25 nm (est)
Detection:

Resolution:		??
On/off time:		 ??			

NOTES: IOC  2001

SOURCES:   Friedman, Norman. The Naval Institute Guide to World Naval Weapon Systems. Annapolis, MD: US Naval Institute Press, 2006., pg. 322-3 ; Jane's Radar and Electronic Warfare Systems 2002-03, "AN/SPQ-9B air surveillance radar, 04 March 2002; "AN/SPQ-9B - Radartutorial." Grundlagen Der Radartechnik. Accessed September 19, 2024. https://www.radartutorial.eu/19.kartei/07.naval/karte001.en.html. ; "AN/SPQ-9B Radar Set." United States Navy. Last modified November 15, 2021. https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/Article/2166776/anspq-9b-radar-set/.