摘要
Mini SAR遥感系统,用微小型SAR做传感器,通过小型飞机或无人机为遥感平台获取地物信息,但载机平台在空中易受气流影响而偏离预设航线产生运动误差。文中首先分析载机平台运动特点,介绍系统中IMU/GPS组合导航数据预处理过程,论述载机平台转动误差、速度误差对SAR成像距离模型的影响。MiniSAR遥感系统获取的影像清晰,可用于制作正射影像图、基础地理信息库更新、灾害监测应急等领域,但不足之处在于影像中某些金属目标出现方位散焦现象。
The remote sensing system of Mini SAR which consists of the miniature SAR and light and small aircraft or UAV platforms can quickly and accurately obtain geographic information .The aircraft platform deviation from preset air route tends to be effected by air stream ,so this paper analyzes the characteristics of the motion of aircraft platform ,and describes the key pre‐processing steps of IMU/GPS integrated navigation data ,then deduces the effect of the rotational error ,velocity error on SAR imaging distance model .The surface features of Mini SAR images are clear which may be used in the production of orthophotos ,basic geographic information database updates ,disaster monitoring and emergency response fields ,but the defect in the images is the azimuth defocus of metal target .
出处
《测绘工程》
CSCD
2017年第5期5-8,共4页
Engineering of Surveying and Mapping
基金
测绘地理信息公益性行业科研专项项目(201412020)
河南省高等学校基本科研业务专项资金(NSFRF140113)
关键词
MINI
SAR
运动误差
POS数据
散焦
Mini SAR
Mini SAR
motionerror
POS data
defocus
Mini SAR
Mini SAR
motionerror
POS data
defocus
