AN/SPS Series Radars

(Updated 13 February 2013)

Bibliography:

Norman Friedman, 1981. Naval Radar. Naval Institute Press. ISBN 0870219677
Bernard Prezelin, 1993. The Naval Institute Guide to Combat Fleets of the World 1993: Their Ships, Aircraft, and Armament. Naval Institute Press. ISBN 1557501041.
Radar Detection and Tracking Systems
The Surface Warfare Test Ship by Charles N. Calvano and Robert C. Harney

AN/SPS-2

Manufacturer: General Electric
Type of Radar: Long range Height Finding Search Radar
IEEE Band: L Band (100 MHz)
NATO Band: A Band
Power: 6.5 megawatts
Beamwidth: 1.6 x 2.7 degree beamwidth
Range Accuracy: 400 yards
Target Detection Example 1: Heavy Bomber at High Altitude at 300 nm
Target Detection Example 2: 1m2 Target at 165 nm
Notes: Only two were built. Installed on CC-1 USS Northampton and CLG-4 USS Little Rock.

AN/SPS-3 (XDK)

Manufacturer: MIT Radiation Laboratory/NRL
Type of Radar: 3D target designator/rapid volume search radar
Notes: Was to be the new modern hemispheric radar post WWII to defeat close-in small suicide attackers by providing high resolution (4-second) data rates to fire control radars. Was specified for new construction and conversions in the late 40s/early 50s. It only appeared once on the USS Northampton CLC-1 in 1954; as a pre-production prototype (XN-1).

AN/SPS-4

Manufacturer: Raytheon
Type of Radar: Surface/Zenith Search Radar
Exact Frequency 5450 – 5825 MHz
IEEE Band: C Band
NATO Band: G Band
Peak Power: 180 kilowatts
Scan Rate: 5 or 15 rpm
PRF/PRR: 625 to 650 pps
Pulse Length: 0.37 to 1.3 microseconds
Bandwidth: 1 MHz (Narrowband) or 5 MHz (Broadband)
Antenna Size (Surface Reflector) 1: 7 x 2 ft (gain of 1000) (2° x 26° beam)
Antenna Size (Zenith Reflector): 4.75 ft (gain of 200) (2.2° x 50° beam)
Beamwidth (Surface Reflector) 1.7 to 2.3 degrees horizontal and 14 to 16 degrees vertical
Beamwidth (Zenith Reflector): 3 deg horizontal and 21 deg above the horizon (maximum radiation at this point)
Range Accuracy: 100 yards
Minimum Range: 150 yards
Detection Example 1:
Destroyer at 20 nautical miles
Detection Example 2: Battleship at 23 nautical miles
Detection Example 3: Fighter at 20 nautical miles
Notes: First deliveries made August 1952. Field modifications in 1958 eliminated the zenith (limited air search) feature due to higher aircraft speeds making it's short range not practical.
(Photo of Components of SPS-4 System)

AN/SPS-10

Peak Power: 250 kW
Scan Rate: 15 rpm
Frequency: 5,450 – 5,825 MHz
Pulse Width: 0.5 / 1.3 μS
PRF (PPS): 640
Antenna Gain: 30 dBi

Notes: AN/UPX-27 is the attached IFF interrogator for SPS-10.

Reference:
Hawaii Range Complex Draft EIS/OEIS, Appendix E (July 2007) (PDF)

AN/SPS-40

Manufacturer: Westinghouse
Type of Radar:
Pulse Compression 2D Air Search
IEEE Band: P Band
NATO Band: B Band (400-450 MHz)
Peak Power: 200 kW
Beam Dimension: 11° x 19°
Minimum Range: 6 Nautical Miles
Range Resolution: 100 yds or less (0.05 nm)
Maximum Altitude: 50,000 feet (15,240m)
Notes: Modification of an existing system in which a solid state transmitter replaced the original tube transmitter.
(Photo of SPS-40 Antenna)

AN/SPS-40B

Type of Radar: Pulse Compression 2D Air Search
IEEE Band: P Band
NATO Band: B Band (400-450 MHz)
Peak Power: 200 kilowatts
Pulse Repetition Frequency: 278 or 300 pps
Pulse Length: 60 or 3 usec
Gain: 21 dB
Beamwidth:
10° x 19°
Minimum Range: 6 nautical miles
Range Resolution: 100 yards or less (0.05 nautical miles)
Maximum Altitude: 50,000 feet (15,240m)
Scan Rate: 7.5 or 15 rpm
Antenna Weight: 1,728 lbs
Belowdecks Weight: 3,474 lbs

AN/SPS-41

Type of Radar: Small Boat Radar
IEEE Band: X Band
Peak Power: 7-10 kW
Minimum Range: 25 Yards
Maximum Range: 32 Nautical Miles?
Bearing Accuracy:
Beam Dimension: 1.8° x 20°

AN/SPS-46

Manufacturer: Lavoie Laboratories
Type of Radar: Small Boat Radar/Navigational Radar
IEEE Band: X Band
Peak Power: 7 kW
Minimum Range: 25 Yards
Maximum Range: 32 Nautical Miles?
Range Resolution: 25 Yards
Beam Dimension: 2.2° x 15°
Bearing Accuracy:

AN/SPS-48

Manufacturer: ITT-Gilfillan
Type of Radar: FRESCAN
IEEE Band: S Band
NATO Band: E and F Bands (2900-3100.5 MHz)
Power
: 2.2 Megawatts
Range Accuracy: 500 Yards (0.25nm)
Bearing Accuracy:
Maximum Range: 220 Nautical Miles
Minimum Ceiling: 100,000 feet (30,480m)

AN/SPS-48C

Manufacturer: ITT-Gilfillan
Type of Radar:
FRESCAN
IEEE Band: S Band
NATO Band: E and F Bands
Peak Power: 2.4 megawatts
PRF: 1,250 to 2,000 pps
Beamwidth: 1.5 x 1.6 deg
Gain: 38.5 dB
Minimum Ceiling: 100,000 feet (30,480m)
Maximum Instrumented Range: 220 nautical miles
Bearing Accuracy: 2 degrees
Range Accuracy: 500 yards (0.25m)
Scan Rate: 7.5 or 15 RPM

AN/SPS-48E

IEEE Band: S Band
NATO Band: E and F Bands
Exact Frequency: 2908 – 3110 MHz
Peak Power: 2,400 kW
Scan Rate: 15 rpm
Pulse Width: 27 μS
Antenna Gain: 39.1 dBi
Above Deck Weights: 5,684 lbs
Below Deck Weights: 24,018 lbs
Power: 112 kVA @ 440 Hz.

Notes: Long range 3D air search radar. Track While Scan. Can track out to about 220 nm.

(SPS-48E Antenna Photo)

Reference:
Hawaii Range Complex Draft EIS/OEIS, Appendix E (July 2007) (PDF)

AN/SPS-49

IEEE Band: L Band
NATO Band: C Band
Exact Frequency: 851-942 MHz
Peak Power: 360 kW
Average Power: 12-13 kW
Beamwidth: 3.3°-3.3° azimuth, 11° elevation
Gain: 28.5 dB
Scan Rate: 6 or 12 rpm
PRF: 280 pps (long range) or 800/1,000 pps (Short range)
Pulse Length: 125 usec
Range Accuracy: 0.03 nm
Azimuth Accuracy: 0.5 degrees
Minimum Range: 0.5 nautical miles
Maximum Instrumented Range:
250 nautical miles
Notes: Known variants are:
AN/SPS-49(V)1
AN/SPS-49(V)2
AN/SPS-49(V)3
AN/SPS-49(V)4
AN/SPS-49(V)5
AN/SPS-49(V)6
AN/SPS-49(V)7
AN/SPS-49(V)8
AN/SPS-49A(V)1

AN/SPS-49A

Exact Frequency: 300-1000 MHz
Above Deck Weights: 3,165 lbs
Below Deck Weights: 14,000~ lbs
Power: 86 kVA @ 440 Hz and 10.1 kVA @ 115 volts.
Notes: Long range 2D air search radar. Can track out to about 250 nm.

AN/SPS-51

Manufacturer: Lavoie Laboratories
Type of Radar: Surface Search
IEEE Band: X Band
Power: 75 kW
Beam Dimension: 1.5° x 20°
Maximum Range: 40 Nautical Miles?
Notes: U.S. Coast Guard Radar.

AN/SPS-53

Manufacturer: Sperry
Type:
Navigational Set
Frequency: 9345-9405 MHz
Peak Power: 35 kilowatts
PRF: 750 and 1500 pps
Pulse Length: 0.1 and 0.5 microseconds
Receiver Noise: 11 dB
Beamwidth (5 ft antenna): 1.6 x 20 degrees
Beamwidth (8 ft antenna): 1 x 20 degrees
Scan Rate: 15 RPM
Input Power: 115 Volts at 57 to 63 Hz.
Range Scales: 0.5, 1 , 2 ,4 , 8, 16, and 32 nautical miles.
Notes: USCG Radar. Found aboard some U.S. Navy vessels including BB-62 USS New Jersey, but mostly on auxiliaries. Replaced AN/SPS-5 on some ships.

AN/SPS-55

Manufacturer: Raytheon/Cardion Electronics
IEEE Band: X Band
NATO Band: I Band
Exact Frequency: 9.05 to 10 GHz
Peak Power: 130 kW
PRF: 2,250 or 750 pps
Pulse Length: 0.12 or 1 usec
Minimum Range: 50 Yards
Beam Dimensions: 1.5° x 20°
Gain: 31 dB
Scan Rate: 16 RPM
Notes: Replacement for AN/SPS-10.

AN/SPS-57

Manufacturer: Ridge Electronics
Type of Radar: Small Craft Surface Search Radar
IEEE Band: X Band
Peak Power: 3 kW
Minimum Range: 25 Yards
Maximum Range: 16 nm?
Beam Dimensions: 1.9° X 25°
Notes: U.S. Coast Guard Radar.

AN/SPS-60

Manufacturer: Sperry
Notes:: Solid-state version of AN/SPS-53E.

AN/SPS-63

Manufacturer: Dynell Electronics
Type of Radar: Surface Search
IEEE Band: X Band
Peak Power: 20 kW
Minimum Range: 20 yards
Maximum Range: 40 nautical miles
Range Accuracy: 2 percent
Bearing Accuracy:
Notes: US Version of Italian 3RM-20H Radar. Used on PHM-1 Pegasus hydrofoils.

AN/SPS-66

Manufacturer: Raytheon
Type of Radar: Small-craft search and navigational radar
IEEE Band: X Band
Power: 7 kW
Maximum Range: 32 nautical miles?
Notes: Military version of Raytheon CRP-3100.