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METHOD AND SYSTEM FOR TERRAIN AVOIDANCE UTILIZING RADAR ALTIMETER, DIGITAL ELEVATION MAPS AND FORWARD LOOKING TERRAIN AVOIDANCE RADAR
METHOD AND SYSTEM FOR TERRAIN AVOIDANCE UTILIZING RADAR ALTIMETER, DIGITAL ELEVATION MAPS AND FORWARD LOOKING TERRAIN AVOIDANCE RADAR
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机译：利用雷达高度计，数字高程图和前视地形避免雷达的地形避免方法和系统
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摘要
Methods and apparatus for detecting obstacles (8) in the flight path of an air vehicle are described. The air vehicle utilizes a radar altimeter (10) incorporating a forward looking antenna (144) and an electronic digital elevation map (154) to provide precision terrain aided navigation. The method comprises determining a position of the air vehicle on the digital elevation map, selecting an area of the digital elevation map in the flight path of the air vehicle, based at least in part on the determined air vehicle position, and scanning the terrain representing the selected map area with the forward looking antenna. The method also comprises combining the digital elevation map data for the selected map area with radar return data for the scanned, selected area and displaying the combined data to provide a representation of the terrain and obstacles in the forward flight path of the air vehicle.
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