资源三号02星激光测高仪足印位置预报方法

发布时间：2018-07-05 03:22

本文选题：激光测高仪 + 激光足印　；参考：《测绘学报》2017年07期

【摘要】：激光测高仪在轨几何检校是提高激光点平面和高程精度的必要途径,而激光足印地准确捕获是成功开展激光测高仪在轨几何检校的前提。本文针对资源三号02星搭载的我国首台激光测高仪的在轨几何检校试验需要,在参考光学遥感卫星成像几何模型的基础上,提出并构建了一套严密的激光足印位置预报模型。该模型充分顾及卫星平台在轨运行规律及激光与卫星相对几何关系,建立了激光发射点到地面足印的严密几何定位预报模型,通过金字塔地形匹配、基于加速度轨道预测以及频率域姿态分析分别获取预估的激光指向、轨道位置和姿态信息,实现地面激光足印的位置预报。该模型已应用于资源三号02星激光测高仪在轨几何检校试验中,预报的激光足印位置与探测器捕获到的实际位置的最大误差小于150m,充分验证了预报模型的正确性,实现了我国遥感卫星从天上到地面点对点的精确预报,为国产激光测高仪在轨几何检校提供了有力的技术支撑。
[Abstract]:The calibration of laser altimeter in orbit is a necessary way to improve the accuracy of laser point plane and elevation, and the accurate acquisition of laser footprint is the prerequisite for the successful calibration of laser altimeter in orbit. In order to meet the need of the in-orbit geometric calibration test of the first laser altimeter carried on the Resource-3 02 satellite, a set of rigorous laser foot-print location prediction model is proposed and constructed on the basis of referring to the optical remote sensing satellite imaging geometry model. This model fully takes into account the orbiting rule of the satellite platform and the relative geometric relationship between laser and satellite, and establishes a rigorous geometric positioning prediction model from laser emission point to ground footprint, which matches the terrain through the pyramid. Based on the acceleration orbit prediction and the frequency domain attitude analysis, the predicted laser pointing, orbit position and attitude information are obtained, respectively, to realize the ground laser foot-print position prediction. The model has been applied to the calibration test of the laser altimeter on the orbit, and the maximum error between the predicted laser footprint position and the actual position captured by the detector is less than 150 m, which fully verifies the correctness of the prediction model. The precise prediction of the point to point from the sky to the ground of the remote sensing satellite in China is realized, which provides a powerful technical support for the calibration of the in-orbit geometry of the domestic laser altimeter.
【作者单位】：国家测绘地理信息局卫星测绘应用中心;辽宁工程技术大学测绘与地理科学学院;武汉大学卫星导航定位技术研究中心;
【基金】：国家高分专项高分遥感测绘应用示范系统项目(AH1601-9) 国家测绘地理信息局2016年基础测绘科技项目(2016KJ0204) 国家青年科学基金(41301525) 国家自然基金面上项目(41571440) 国家测绘地理信息局青年学术带头人基金(D1501)~~
【分类号】：P237

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