EVALUATION OF TWO AN/APS-94 SIDE-LOOKING AIRBORNE RADAR SYSTEMS IN THE DETECTION OF SEARCH AND RESCUE TARGETS

Since September 1978, side-looking airborne radar (SLAR) detection data have been gathered in conjunction with four visual detection experiments conducted by the U.S.C.G. R&D Center. These are part of a series of experiments designed to improve search planning guidance contained in the National Search and Rescue Manual. HC-130 aircraft, equipped with either the Airborne Oil Surveillance System (AOSS) or SLAR/radar image processor (SLAR/RIP) configuration of the AN/APS-94C or D SLAR, conducted controlled searches for life rafts, small boats, and 41- to 95-foot Coast Guard vessels in Block Island Sound or open ocean. Through the use of a microwave tracking system and SLAR data, the positions of searchers and targets were accurately reconstructed to facilitate the verification of detections on SLAR films or video tape. These data were used to evaluate the effects of environmental and controllable parameters on SLAR detection of the various target types. Of the 12 parameters investigated, target size/composition, search altitude, swell height, wind speed, and humidity/precipitation were found to have a significant influence on SLAR detection performance. Upper-bound lateral range curves and sweep widths for SLAR search are included. Real-time performance tests for AN/APS-94D SLAR and system performance tests for new SLARs (AN/APS-131) are recommended. More environmental conditions (severe), target types, and gain/altitude combinations should be tested. Improved image processing capability and operator training are needed. Real-time, operational lateral range curves for SLAR should be developed as inputs to the computer-assisted search planning (CASP) system. (Author)

  • Supplemental Notes:
    • Original contains color plates: All DTIC and NTIS reproductions will be in black and white.
  • Corporate Authors:

    Analysis and Technology, Incorporated

    P.O. Box 220
    North Stonington, CT  United States  06259

    United States Coast Guard

    2100 Second Street, SW
    Washington, DC  United States  20593

    Coast Guard

    Office of Research and Development
    Washington, DC  United States 
  • Authors:
    • Osmer, S R
    • Edwards, NCJ
    • HOVER, G L
    • Mazour, T J
  • Publication Date: 1981-8

Media Info

  • Pagination: 163 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00347811
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Contract Numbers: DTCG39-80-C-80052
  • Files: NTIS
  • Created Date: Mar 30 2002 12:00AM