In deep space surveillance missions using high-sensitivity infrared sensor systems, satellite targets must be detected among a background scene of thousands of stars. Data stream processing must provide early rejectio...
详细信息
In deep space surveillance missions using high-sensitivity infrared sensor systems, satellite targets must be detected among a background scene of thousands of stars. Data stream processing must provide early rejection in the processing stages of the star scene to permit targetdetection and to meet the downlink data transmission capacity constraint. Two star-elimination techniques are formulated - a multicolor elimination concept, and a moving target indicator (MTI) technique - and their performance analyzed. Multicolor elimination methods reduce the star scene to a star leakage rate of about 39 stars/deg2; the MTI technique reduces the star scene to a dramatically low star leakage rate - to <0.05 stars/deg2.
This paper specifies the operational requirements for a ship-based sensor system for reliable all weather detection and avoidance of ice obstacles for two applications: for station keeping at northerly drillsites and ...
详细信息
This paper specifies the operational requirements for a ship-based sensor system for reliable all weather detection and avoidance of ice obstacles for two applications: for station keeping at northerly drillsites and production sites;for large, high-speed liquefied natural gas carriers as planned in the Arctic Pilot Project. Radar, sonar, infrared, and low-level light detectors are analyzed for their detection capability. Each sensor is discussed in terms o the transmitting channel or medium and ice target characteristics peculiar to that sensor, including dependence of target strength on berg size and shape. The capabilities and deficiencies of currently available sensor hardware are discussed, both separately and for use in multisensor systems. A field program to obtain sensor parameters is briefly reviewed.
暂无评论