AN/SPS-49

AN/SPS-49

Country of origin United States
Introduced 1975
No. built 200+
Type 2D Air-search
Frequency L band 851–942 MHz
Range 3 nmi (5.6 km) to 256 nmi (474 km) (AN/SPS-49A(V)1)
Altitude up to 150,000 ft
(45,720 m)
Diameter 24 ft (7.3 m) × 14 ft 3 in
(7.3 m × 4.3 m)
Azimuth 0 to 360°
Precision 1/16 nmi range
0.5 deg azimuth (SPS-49A(V)1)
Power 360 kW peak, 13 kW average (AN/SPS-49A(V)1)

The AN/SPS-49 is a United States Navy two-dimensional, long range air search radar built by Raytheon that can provide contact bearing and range. It is a primary air-search radar for numerous ships in the U.S. fleet and in Spain, Poland, Taiwan aboard Oliver Hazard Perry-class frigates, Canada on its Halifax-class frigates, New Zealand on its Anzac-class frigates and Australia on its Adelaide-class frigates and Anzac-class frigates. It also serves in a complementary role aboard Aegis cruisers with the AN/SPY-1.

Operation

First tested in 1965 aboard USS Gyatt and introduced in 1975, the AN/SPS-49 operates in the 851–942 MHz, or L-, band and has a range of 256 nautical miles (474 km). The orange-peel parabolic shape of the antenna creates a narrow 3.3°-beam to reduce the probability of detection or jamming. It can rotate at 6 rpm in long range mode or 12 rpm in short-range mode.[1] Default is at 12 rpm for the AN/SPS-49A(V)1, to provide more frequent scans against incoming missiles. The SPS-49A(V)1 can detect out to its full range at either 6 or 12 rpm. The antenna is stabilised to compensate for ships pitch and roll, to a maximum of +/-15° for both pitch and roll in 12 rpm mode, and +/-23.5° for both pitch and roll in 6 rpm mode. The output stage of the transmitter in all variants uses a two-cavity klystron amplifier.

The AN/SPS-49 is part of the combat systems of the Oliver Hazard Perry-class frigate.

In 1998, the Inspector General of the Department of Defense reported that SPS-40 and SPS-49 radars in Bahrain were "unusable because the equipment operates on a frequency that interferes with the Bahrain telecommunications services". [2]

Antenna of an AN/SPS-49(V)8 ANZ radar system on a Royal Australian Navy ANZAC class frigate. The AS-177B/UPX antenna fitted to the rear of the reflector functions as a back-fill radiator for the AS-4328/U IFF interrogator antenna.

Variants

As of 2014, there are eleven configurations of the AN/SPS-49(V).

See also

References

  1. ↑ GlobalSecurity AN/SPS-49
  2. ↑ "Pentagon Equipment Disrupting Phone System". Boca Raton News. Associated Press. October 18, 1998.
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