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AN/SPS-40
2-D long range air search radar of the United States Navy / From Wikipedia, the free encyclopedia
The AN/SPS-40 is a United States Navy two-dimensional, long range air search radar that is capable of providing contact bearing and range. It was replaced by the AN/SPS-49 on newer ships and on ships that received the New Threat Upgrade.
Quick Facts Country of origin, Manufacturer ...
![]() AN/SPS-40 on USS Trenton | |
Country of origin | United States |
---|---|
Manufacturer | Lockheed Electronics Company[1] |
Introduced | 1961[2] |
Type | 2D Air-search |
Frequency | 400 - 450 MHz, UHF band |
RPM |
|
Range | 250 nmi |
Diameter | 140" x 214" |
Azimuth | 0-360° |
Elevation | Vertical beam width 19° |
Precision | Horiz. beam width 10.5° |
Power | 200 kW - 300 kW[3] |
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The SPS-40, being a vacuum tube design, was notoriously sensitive to the vibration from shipboard gunfire. A later redesign into a largely solid-state system not only improved its performance (cutting the number of cabinets by more than half) also featured one of the best MTI (Moving Target Indicator) units in the fleet - a rarity in the early 1970s.