Accession Number : ADA317649

Title :   Preliminary Field Test Results: Evaluation of Infrared Sensors For Surface Vessel Law Enforcements Operations.

Descriptive Note : Interim rept. Jun-Dec 95,

Corporate Author : COAST GUARD WASHINGTON DC OFFICE OF RESEARCH AND DEVELOPMENT

Personal Author(s) : Skowronek, P. ; Plourde, J. V.

PDF Url : ADA317649

Report Date : DEC 1995

Pagination or Media Count : 60

Abstract : During July 1995, the USCG conducted a field evaluation of several commercially available infrared sensors for their ability to detect low profile surface vessel targets of interest to the law enforcement community. The evaluation was conducted in the target rich area of Long Island Sound between New London, CT and Gardiners Island, NY. The sensors were operated from the roof of the Coast Guard Research and Development Center. Sensors evaluated included the Agema Thermovision 1000 and FLIR Systems SAFIRE operating in the long wave IR (LWIR) and the Aerojet General Thermal Imaging System and Amber Radiance 1 operating in the medium wave IR (MWIR). Each sensor provided a narrow field of view of 2 to S degrees, thus permitting comparison of relative performance. Surface truth data were maintained through the use of a GPS tracking system. Environmental conditions were recorded both at the shore side sensor array and onboard one of the target craft. Radiometric data were recorded for all targets during data collection periods. These data were used to determine the thermal contrast available to the sensors for any target imaging scenario. Analysis of the image data confirmed that all sensors were able to classify targets into general categories at distances up to approximately three nautical miles. While the LWIR sensors were able to detect the targets consistently at distances of 6 to 8 nautical miles, the MWIR sensors outperformed those detection distances by approximately a factor of 2. The relatively high atmospheric moisture content is considered to be the primary cause of these differences.

Descriptors :   *COMMERCIAL EQUIPMENT, *INFRARED DETECTORS, *TARGET DETECTION, *LAW ENFORCEMENT, *COAST GUARD RESEARCH, *COAST GUARD SHIPS, THERMAL PROPERTIES, SCENARIOS, CONTRAST, HIGH RATE, FORWARD LOOKING INFRARED SYSTEMS, COMPARISON, FIELD TESTS, ARRAYS, TARGETS, MOISTURE CONTENT, INFRARED IMAGES, DATA ACQUISITION, LONG WAVELENGTHS, RADIOMETRY, WAVES, ATMOSPHERES, HUMIDITY, SHORES, SURFACE TRUTH, ROOFS, LONG ISLAND SOUND.

Subject Categories : Marine Engineering
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE