天绘一号卫星影像自检校光束法区域网平差

Self-calibration bundle block adjustment of Mapping Satellite-1 three-line imagery

针对卫星发射过程中产生的像点坐标偏差导致对地定位精度低下的问题,该文以国产高分辨率卫星天绘一号三线阵影像为例,构建了内方位自检校参数模型和不同的外方位内插模型,建立了多传感器自检校光束法区域网平差模型。利用一景三线阵数据进行实验,结果表明,相同控制方案下,定向片模型自检校方案优于其他外方位模型自检校方案;控制点数量为5、定向片数量为4时,整体平差精度最高,检查点定位精度可以达到平面7.28m和高程4.02m。

In view of the low accuracy of positiong caused by coordinate deviation in the process of sat- ellite lunching, an interior orientation self-calibration model and different exterior orientation interpolation models for homemade high resolution satellite Mapping Satellite-1 three-line imagery were construc- ted. The multi-sensor self-calibration bundle block adjustment model was constructed. Based on three-line imagery data, experiments were done on the models, the results proved that orientation image model of self-calibration was better than other exterior parameters self-calibration; and the whole accuracy could a- chieve the highest when using 5 ground control points and 4 orientation images, the planar and vertical ac- curacy of check points were improved to 7.28m and 4.02m respectively.