国防科技大学学报2016，Vol.38Issue(5)：121-126,6.DOI:10.11887/j.cn.201605019
基于高精度景象匹配的SAR平台定位方法
SAR positioning method based on high-precision scene matching
摘要
Abstract
A SAR platform location method which utilizes the high-precision scene matching of SAR images and optical reference images was proposed.According to that the projections of SAR platform and object point in SAR image centerline are collinear,some points on the centerline were equably engaged as control points in the proposal method,and then the spatial position was obtained by matching with optical reference image. The equation of the projection line on the local horizon of centerline was estimated with the points.The projection point position of the SAR platform on the horizontal plane was calculated by making use of the straight line and slant-range-altitude information,as well as the spatial position of the platform.Considering the difference between boresight and squint imaging mode,rough rectifying methods were respectively proposed according to the two modes to improve the matching precision.The impact of different errors on location precision was also analyzed and the precision estimation formulas were derived.Both simulation and real data test results show high accuracy and precision of the proposed method,thus bringing forth good practical value for engineering.关键词
合成孔径雷达/平台定位/景象匹配/直线拟合/误差传递Key words
synthetic aperture radar/platform geo-location/scene matching/line fitting/error propagation分类
信息技术与安全科学引用本文复制引用
陈圣义,刘晓春,滕锡超,李晓雪,雷志辉..基于高精度景象匹配的SAR平台定位方法[J].国防科技大学学报,2016,38(5):121-126,6.基金项目
国家重大科学仪器设备开发专项资助项目 （）
