首页> 中文期刊> 《测绘学报》 >基于有理多项式模型的GF4卫星区域影像平差处理方法及精度验证

基于有理多项式模型的GF4卫星区域影像平差处理方法及精度验证

         

摘要

It is analysed that the geometric characters of specific patch-imaging mode of GF4 which is the first geostationary orbit optical remote sensing satellite of China.And a block adjustment method using average elevation is proposed directing at the specific geometric character that the base to height ratio between images is very smal l.The method constructs the block adjustment model based on rational function model (RFM)and the proposed block adjustment method is employed on the GF4 patch-images without ground control,which solves the low splicing accuracy situation due to some factors,such as low orbit and attitude measurement accuracy,astronomical refraction and lens distortion etc.At last,in two experiments with GF4 real data,it is verified that the accuracy and effectiveness of the proposed method, and the influence of different imagery errors compensated model is analysed also.%分析了我国首颗静止轨道光学遥感卫星高分四号(GF4)特有的区域成像模式的几何特性,基于静止轨道成像基高比较小的几何特性提出一种利用平均高程面的区域网平差方法。该方法针对GF4卫星影像构建了基于有理多项式模型RFM的区域网平差模型,并在无控制条件下,对GF4卫星区域影像进行区域网平差处理,解决了GF4号区域影像由于定轨误差、定姿误差、大气折光以及镜头畸变等因素导致的拼接精度较低的问题。最后,通过两组真实数据试验对本文方法的精度及有效性进行了验证,同时分析了采用不同的误差补偿模型对于平差结果精度的影响。

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