基于北斗和GPS的高分二号全色影像正射精度验证与分析

发布时间：2018-03-03 00:08

本文选题：高分二号卫星　切入点：北斗卫星导航系统　出处：《国土资源遥感》2017年03期 　论文类型：期刊论文

【摘要】：高分二号(GF-2)卫星几何精纠正是其广泛应用的前提。以福州市作为实验区,选择北斗卫星导航系统(北斗)和GPS野外测量获取控制点和检查点,采用像方平移、像方漂移和像方仿射变换3种方法对有理函数模型进行误差补偿,验证分析控制点测量精度、分布、数目以及纠正方法对GF-2全色影像纠正的影响,并分析了北斗应用于GF-2全色影像正射纠正的潜力。实验结果表明:少量分布均匀的控制点就可以消除GF-2全色影像纠正后的系统几何误差;3种纠正方法中像方仿射变换方法精度最高,其中GPS控制测量下检查点平面均方根误差为1.49 m,北斗RTK控制测量下检查点平面均方根误差为1.51 m,GPS与北斗RTK控制测量下的影像纠正精度接近;北斗2种测量模式中,只有RTK模式能够满足GF-2全色影像纠正需求。上述研究表明,GF-2全色影像能够利用GPS和北斗RTK模式控制测量下的少量分布均匀高精度控制点达到较高纠正精度,满足实际应用需求。
[Abstract]:The geometric correction of GF-2) satellite is the precondition of its wide application. Taking Fuzhou City as the experimental area, the Beidou Satellite Navigation system (Beidou) and GPS field measurements are selected to obtain control points and check points, and the image square translation is adopted. Three methods of image drift and affine transform are used to compensate the error of rational function model, and the effect of measuring accuracy, distribution, number and correction method of control points on GF-2 panchromatic image correction is verified. The potential of Beidou application in orthographic correction of GF-2 panchromatic image is analyzed. The experimental results show that a small number of uniformly distributed control points can eliminate the system geometric error of GF-2 panchromatic image correction. The transformation method has the highest accuracy. The root mean square error (RMS) of checkpointing plane under GPS control is 1.49m, and that under Beidou RTK control is 1.51mGPS and Beidou RTK control is similar to that of Beidou RTK. Only the RTK mode can meet the needs of GF-2 panchromatic image correction. The above research shows that the GF-2 panchromatic image can achieve high correction accuracy by using a small number of uniform and high precision control points under the control of GPS and Beidou RTK mode, and meet the practical application requirements.
【作者单位】：中国科学院遥感与数字地球研究所;中国科学院大学;中国地质大学(武汉)李四光学院;
【基金】：国家重点研发计划全球变化及应对专项项目“大尺度全球变化数据产品快速生成方法”(编号:2016YFA0600302) 海南省重大科技计划项目“海南省遥感大数据服务平台建设与应用示范”(编号:ZDKJ2016021);海南省重大科技计划项目“新型海洋信息感知关键技术及设备研发”(编号:ZDKJ2016015-1)共同资助
【分类号】：P228.4;P237;TP751

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