自然地表测距残差对激光测高系统的在轨检校  

On-orbit calibration of spaceborne laser altimeter using natural surface range residuals

作　　者：易洪[1] 李松[1] 翁寅侃[1] 马跃[2] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079 [2]山东科技大学测绘学院,山东青岛266590

出　　处：《华中科技大学学报（自然科学版）》2016年第8期58-61,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11574240);测绘地理信息公益性行业科研专项资金资助项目(201412007;201512016);中央高校基本科研业务费专项资金资助项目(2015212020201)

摘　　要：针对星载激光测高系统,提出一种基于自然地物表面测距残差分析的星载激光测高仪系统误差的在轨检校方法,该方法在已知地表先验模型的前提下推导出测距模型,根据推导的测距模型利用测距残差分析,对激光指向角误差及测距误差进行检校.相较于海洋扫描的测距残差分析方法,该方法利用了残差分析进行检校,但检校场不再局限于平静的海面,且避免了姿态机动;相较于自然地物表面的检校方法,利用了自然地物表面作为检校场,建立的误差模型更直观地反映出激光指向角对测距值的影响.仿真结果表明:该方法能较好地对激光指向角误差及测距误差进行检校,使假定系统误差值与系统误差检校值的偏差值优于12%.For spaceborne laser altimeter system,an on-orbit calibration method using natural surface range residual analysis has been proposed.A natural surface range measurement model was derived,based on the range model.And use range residual analysis,the laser pointing bias and range bias were calibrated.Compared to the ocean scans,the proposed method makes the same use of range residual analysis,but the calibration sites are not limited to flat terrains,and avoids the attitude maneuver.And compared to the natural surface calibration,the proposed method also uses the natural surface as the calibration site,but the derived error model gives a more intuitive explanation of the effect of pointing error to altimeter range value.The simulation results show that systematic errors in pointing and range can be calibrated effectively by the proposed method,and the RSS of the calibration deviation is better than 12%.

关 键 词：星载激光测高系统 系统误差 在轨检校 激光测高 测距残差 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]