摘要
针对地面高程起伏对机载雷达成像定位的影响,分别从景像匹配定位和飞行器定位两个方面探讨了地形起伏的影响,提出了一种基于雷达成像几何关系和野值剔除来实现飞行器精确定位的方法。该方法能够避免地形起伏对景像匹配的影响而产生的飞行器定位偏差,较好地修正地形起伏对飞行器定位影响而产生的偏移,并适于飞行器上实时处理。经实验验证,当飞行高度在6 km时,在经度和纬度方向飞行器定位中误差分别为13.70 m和28.04 m,保证了1个像素(32 m)内的定位精度。
The influence of the terrain undulation on scene matching location and aeroplane location is discussed for the airborne radar imaging location. A method based on the geometrical relationship of the real aperture radar imaging and the idea of outlier eliminating is presented. The method is effective to avoid the scene matching location errors and correct the aeroplane location errors caused by terrain undulation. It is fit for the airborne real-time processing. The experiments prove that the errors are respectively 13. 70 m and 28. 04 m in longitude and latitude when the aeroplane is at the altitude of 6 km, which are less than i pixel（32 m）.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2006年第3期403-406,414,共5页
Systems Engineering and Electronics
基金
国家"863"高技术计划基金资助课题(2003AA133040)
关键词
真实孔径雷达
飞行器定位
地形起伏
景像匹配
real aperture radar
aeroplane location
terrain undulation
scene matching
