资源三号02星对地激光测高系统几何检校及验证

发布时间：2019-05-11 21:11

【摘要】：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20m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0.5m。
[Abstract]:The installation error, laser pointing and laser ranging error of the space-borne laser altimeter lead to the low accuracy of the final laser height measurement. The in-orbit geometric calibration of the laser can effectively improve the accuracy of laser height measurement. Aiming at the working mode of Resource 02 (ZY3-02) laser altimeter, the same orbit laser rangefinding values are constrained by the data of space shuttle radar topographic mapping task (shuttle radar topography mission,SRTM (digital elevation model (digital elevation model,DEM). The initial calibration of the exit direction of satellite laser is realized by approaching the trend line of topographic fluctuation. The experimental results show that the relative calibration accuracy of laser pointing in different orbit is less than 20m. The geometric precision of the space-borne laser altimetry system is calibrated by using the method of laying laser targets on the ground, and the precision of ZY3-02 laser height measurement in the flat region is better than 0.5 m by field measurement.
【作者单位】：武汉大学测绘遥感信息工程国家重点实验室;
【基金】：国家重点研发计划(2016YFB0500801) 国家自然科学基金(91538106,41501503,41501383,41601490) 湖北省自然科学基金(2015CFB330) 测绘遥感信息工程国家重点实验室开放基金(15E02) 地理信息工程国家重点实验室开放基金(SKLGIE2015-Z-3-1) 中央高校基本科研业务费专项资金(2042016kf0163)~~
【分类号】：P237

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