Mathematical Model of Airborne InSAR Block Adjustment
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摘要: 研究了机载InSAR高精度三维定位数学模型及区域网平差误差模型,分析了机载InSAR区域网平差参数、观测值及定权方法。利用自主研发的机载InSAR区域网平差软件系统完成了四川绵阳测区分辨率为0.5m的4条航带共76景影像约500km2的机载InSAR区域网平差实验,在大面积、稀少控制条件下满足1∶1万DEM、DOM定位精度要求。Abstract: High-precision surface elevation information can be obtained efficiently by airborne InSAR systems. Airborne InSAR systems have been an important means for remote sensing data acquisition and mapping in the areas where surveying and mapping is currently difficult.A three dimensional positioning and error model for airborne InSAR block adjustment were researched.Observations，weights determination and adjustment parameters were analyzed.In an experiment，76 airborne In-SAR images at 0.5 m resolution were used generate a block of 4 strips by 19 rows.The results show that the positional accuracy of a DEM and DOM at scale of 1:10 000 were achieved for large areas with sparse control points.
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