AN/SPS-49

Template:Short description Template:Template other 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 s, Canada on its (prior to FELEX mid-life upgrade) and New Zealand on its s. It formerly served in a complementary role aboard Aegis cruisers with the AN/SPY-1 but the systems are currently being removed during routine upgrade with no replacement.

In accordance with the Joint Electronics Type Designation System (JETDS), the "AN/SPS-49" designation represents the 49th design of an Army-Navy electronic device for surface ship search radar system. The JETDS system also now is used to name all Department of Defense electronic systems.

Operation

First tested in 1965 aboard and introduced in 1975, the AN/SPS-49 operates in the 851–942 MHz, or L-, band and has a range of . 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. 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.

File:Combat systems of the FFG-7 class.png

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".

On board ships

Template:Flagicon Republic of China

• Cheng Kung-class frigate

Template:Flagicon New Zealand

• Te Kaha-class frigate (Replaced with SMART-S as part of the FSU programme in the early 2020s)

File:SPS-49(V)8 ANZ.jpg

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.

Template:Flagicon South Korea

• Gwanggaeto the Great-class destroyer

Variants

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

• AN/SPS-49(V)1: Baseline radar (Various CVN, LHA, LSD and other ships)
• AN/SPS-49(V)2: (V)1 radar without the coherent side lobe cancellation feature (s)
• AN/SPS-49(V)3: (V)1 radar with the radar video processor (RVP) interface (FC-1) ()
• AN/SPS-49(V)4: (V)2 with the RVP interface (s)
• AN/SPS-49(V)5: (V)1 with automatic target detection (ATD) (New Threat Upgrade (NTU) ships)
• AN/SPS-49(V)6: (V)3 system with double shielded cables and a modified cooling system ()
• AN/SPS-49(V)7: (V)5 system with a (V)6 cooling system (Aegis combat system)
• AN/SPS-49(V)8: (V)5 system enhanced to include the AEGIS Tracker modification kit (Aegis combat system)
• AN/SPS-49(V)8 ANZ: (V)8 system modified to interface with the CelsiusTech 9LV-453 combat system (s)
• AN/SPS-49(V)9: (V)5 with medium PRF upgrade (MPU)
• AN/SPS-49A(V)1: Developed in the mid-1990s. Added radial speed determination on each target, each scan. Improved clutter rejection

See also

• List of radars
• List of military electronics of the United States

External links

• Electronics Technician Volume 4-Radar Systems - via Tpub