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- 2018
资源三号02星激光测高误差分析与指向角粗标定
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Abstract:
2016年5月30日，中国成功发射了民用三线阵立体测图卫星资源三号02星，该卫星搭载了中国第一个用于对地观测的激光测高试验性载荷。资源三号02星在轨运行以来获取了多轨测高数据，为保证其测高数据的有效应用，需分析影响测高精度的各项误差来源，并通过一定的方法予以消除或减弱。首先根据卫星激光测高严密几何模型分析资源三号02星激光测高的各项误差来源，分析表明激光指向角对激光测高精度的影响相对较大；构建通过已有大范围地形数据进行激光指向角粗标定的数学模型，并利用已有公开地形数据（AW3D30 DSM）对激光指向角进行粗标定，从而提高激光足印定位精度。实验结果表明，利用已有地形数据对指向角进行粗标定后，能将激光测高精度从几十米提高到3 m以内，验证了卫星激光测高误差分析的合理性和利用已有地形数据修正激光指向角的数学模型的有效性，为消除卫星激光测高粗差提供了参考，能为星载激光测高外场在轨检校工作提供支撑
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