机载POS系统用于航空遥感直接对地目标定位的精度分析  

Accuracy Analysis of Direct Georeferencing by Airborne Position and Orientation System in Aerial Photogrammetry

作　　者：袁修孝[1] 傅建红[1] 左正立[2] 孙红星[1] 

机构地区：[1]武汉大学遥感信息工程学院,武汉市珞喻路129号430079 [2]中国科学院遥感应用研究所,北京市朝阳区大屯路3号100101

出　　处：《武汉大学学报（信息科学版）》2006年第10期847-850,共4页Geomatics and Information Science of Wuhan University

基　　金：高等学校全国优秀博士学位论文作者专项基金资助项目(200142);国家教育部新世纪优秀人才支持计划资助项目(NCET-04-0662)

摘　　要：利用实际航摄资料评价了WGS 84和国家80坐标系下机载POS(position and orientation system)系统直接对地目标定位的精度,分析了不同大地水准面拟合方法对高程精度的影响,检校了POS系统的视准轴误差,讨论了检校场的检校结果。试验表明,基于POS系统的航空遥感直接对地目标定位至少需要利用带有1个平高地面控制点的检校场对POS系统进行检校才能消除系统误差;在WGS84坐标系中,可以获得较高的定位精度,而转换到国家80坐标系下,必须对高程进行大地水准面拟合改正。The accuracy of direct georeferencing by airborne position and orientation system （POS） in WGS 84 coordinate system and in 80 Xi＇an geodetic coordinate system is appraised, the height accuracy by using different geoid simulate methods is analyzed, the boresight angle errors of POS system are calibrated and the calibration results in different test fields are discussed. The empirical results have verified that direct georeferencing of aerial photogrammetry based on POS system requires a calibration field with at least 1 XYZ ground control point to eliminate system errors. The accuracy of direct georeferencing is very good in WGS 84 coordinate system. However, it is necessary for getting accurate 3D coordinates of the photogrammetric points to correct height by using geoid simulate in 80＇ geodetic coordinate system.

关 键 词：POS系统 目标定位 高程拟合 精度 

分 类 号：P231.2[天文地球—摄影测量与遥感] P237.9[天文地球—测绘科学与技术]