方差分量估计在机载InSAR区域网平差中的应用  

Application of Variance Components Estimation in Airborne InSAR Block Adjustment

作　　者：熊新[1] 靳国旺[1,2] 张红敏[1] 徐青[1] 

机构地区：[1]信息工程大学地理空间信息学院,河南郑州450001 [2]中国测绘科学研究院,北京100039

出　　处：《测绘学报》2016年第5期592-600,共9页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金(41071296;41474010;61401509);国家863计划(2011AA120402)~~

摘　　要：基于验后方差分量估计的思想,针对观测值中各类观测分量的方差难以直接估计的问题,研究了机载InSAR区域网平差干涉参数定标权值确定理论,设计了利用Helmert方差分量估计扩展模型的机载InSAR区域网平差干涉参数定标权值确定方法。采用我国机载双天线InSAR数据进行相关试验,表明验后估计定权能合理地顾及DEM的生成精度和拼接精度。Based on the idea of posterior variance component estimation,aiming at the problem that variance component for each observation component can＇t be estimated directly,the theory of weights determination for airborne InSAR interferometric parameters calibration with block adjustment is studied and the corresponding calibration method is designed on the basis of the extended model of variance components estimation of Helmert type.Calibration experiments performed on Chinese dual antenna airborne InSAR data confirm that the calibration schemes with posterior variance component estimated can take generation accuracy and mosaic accuracy of DEM into account reasonably.

关 键 词：合成孔径雷达干涉测量 HELMERT 干涉参数 区域网平差 定权 

分 类 号：P231[天文地球—摄影测量与遥感]