AN/APS-116 Periscope-Detecting Radar

The AN/APS-116 Radar System was developed by the U.S. Navy for ocean surveillance and antisubmarine warfare patrol. The basic system requirement is to reliably detect small periscope-sized targets against strong interfering signals form sea clutter backscatter. The radar system design approach utilized very fine range resolution and a rapid scan antenna. A signal processing scheme was implemented using scan-to-scan decorrelation, with a M-out-of-N threshold for target detection. A brief description of each major unit of the radar is included, along with a summary of the evaluation tests that verified system performance.