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-  2017 

资源三号02星对地激光测高系统几何检校及验证
Geometric Calibration and Validation of ZY3-02 Satellite Laser Altimeter System

DOI: 10.13203/j.whugis20160514

Keywords: 激光测高,资源三号02星,无波形,几何检校,地形匹配,
satellite laser altimeter
,ZY3-02,without waveform,geometric calibration,terrain matching

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Abstract:

星载激光测高仪安装误差、激光指向和激光测距误差等导致最终激光测高精度不高,对激光器进行在轨几何检校可以有效提升激光测高精度。针对资源三号02星(ZY3-02)激光测高仪的工作模式,以裸露地表的航天飞机雷达地形测绘任务(shuttle radar topography mission,SRTM)数字高程模型(digital elevation model,DEM)数据约束同轨激光测距值,通过逼近地形起伏趋势线实现了卫星激光器出射方向的初始检校,实验证明不同轨激光指向的相对检校精度在20 m以内。利用地面铺设激光靶标的方法对星载激光测高系统进行几何精检校,并通过外业测量验证了ZY3-02激光器在平坦区域的测高精度优于0.5 m

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