| 卫星激光测高严密几何模型构建及精度初步验证 |
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| 引用本文： | 唐新明,李国元,高小明,陈继溢.卫星激光测高严密几何模型构建及精度初步验证[J].测绘学报,2016,45(10):1182-1191. |
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| 作者姓名： | 唐新明 李国元 高小明 陈继溢 |
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| 作者单位： | 1. 武汉大学资源与环境科学学院, 湖北 武汉 430079;
2. 国家测绘地理信息局卫星测绘应用中心, 北京 100048 |
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| 基金项目： | 国家青年科学基金(41601505)，国家高分专项高分遥感测绘应用示范系统项目(AH1601-8)，国家测绘地理信息局2016年基础测绘科技项目(2016KJ0204) |
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| 摘 要： | 采用星载激光测高仪辅助提高卫星立体影像几何定位精度特别是高程精度,已经得到了航天摄影测量界的重视,计划于2018年发射的高分七号卫星上将同时搭载光学立体相机和激光测高仪。虽然,已有相关文献针对美国的ICESat(Ice,Cloud,and land Elevation Satellite)卫星上搭载的地球科学激光测高系统(Geo-science Laser Altimeter System,GLAS)的几何模型和产品精度作了相关介绍,但对其严密的几何定位模型和精度验证目前还没有系统性的阐述。本文较全面地对激光测高卫星的严密几何模型进行了构建与精度分析,并选择ICESat/GLAS的0级辅助文件,采用严密几何模型重现了2级产品的生产过程。将本文计算的结果与ICESat/GLAS的结果进行了对比分析,其中基于几何模型的高程误差约11 cm,平面误差在3 cm以内,表明所提出的严密几何模型的正确性,同时采用新发射的资源三号02星的激光测高数据进行了初步处理和验证。相关结论可为国产高分后续卫星的激光测高数据处理提供参考。
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| 关 键 词： | 星载激光测高 严密几何模型 数据处理 精度验证 |
| 收稿时间： | 2015-07-07 |
| 修稿时间： | 2016-09-01 |
The Rigorous Geometric Model of Satellite Laser Altimeter and Preliminarily Accuracy Val idation |
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| TANG Xinming,LI Guoyuan,GAO Xiaoming,CHEN Jiyi.The Rigorous Geometric Model of Satellite Laser Altimeter and Preliminarily Accuracy Val idation[J].Acta Geodaetica et Cartographica Sinica,2016,45(10):1182-1191. |
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| Authors: | TANG Xinming LI Guoyuan GAO Xiaoming CHEN Jiyi |
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| Institution: | 1. School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China;
2. Satellite Surveying and Mapping Application Center, National Administration of Surveying, Mapping and Geo-information, Beijing 100048, China |
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| Abstract: | It has been paid attention to improving the elevation accuracy of satellite stereo images aided by laser altimeter.The GF-7 satellite scheduled to launch in 2018 will be equipped with optical stereo cameras and a laser altimeter.ICESat (Ice,Cloud,and land Elevation Satellite)with GLAS(Geo-science Laser Altimeter System)is the first and still only laser altimeter satellite for earth observation until now.In this paper,the comprehensively analysis about the rigorous geometric model and accuracy analysis of laser altimeter is presented.The error induced by laser pointing aberration and mounting is proposed,and the data processing workflow of ICESat/GLAS from level 0 to level 2 is introduced.What’s more,the geo-location accuracy between this paper and GLAS product is compared and the model is val idated by the result that the accuracy based on the model is about 3 cm and 11 cm in the horizontal and vertical direction,respectively.The laser altimeter data loaded on the ZY3-02 satellite has been processed and validated preliminarily.The conclusion of this paper is valuable and can be viewed as reference for the subsequent domestic laser altimeter satellites. |
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| Keywords: | space-borne laser altimeter rigorous geometric model data processing accuracy validation |
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