GPS／IMU用于航空遥感直接对地定位的原理与方法  

Principle and Method of Airborne Remote Sensing Direct Geo-referencing Using GPS/IMU

作　　者：王冬红[1,2] 范永弘[1] 王慧[1] 刘军[1] 

机构地区：[1]解放军信息工程大学测绘学院,河南郑州450052 [2]65015部队,辽宁大连116023

出　　处：《海洋测绘》2010年第2期11-14,共4页Hydrographic Surveying and Charting

基　　金：国家863计划项目（2006AA122154）;中国博士后科学基金（20080430587）;国家自然科学基金（40901230）.

摘　　要：阐述了GPS／IMU系统进行位置与姿态测量的基本原理，推导了利用GPS／IMU的导航解计算遥感器瞬时外方位元素的数学模型，并利用机载三线阵影像验证了GPS／IMU辅助直接对地定位的精度潜力。三组ADS40数据直接定位的试验结果表明，GPS／IMU提供的外方位元素具有较高的定位精度，平面精度优于2．5个像元，高程优于5．1个像元，但存在系统性的测量误差，在大比例尺遥感测绘作业中引入少量控制点参与平差仍是必须的。The principle of GPS/IMU system to measure position and attitude parameters is discussed, and then the mathematic model to calculate exterior orientation parameters of airbome sensor from GPS/IMU navigation results is derived. At last airborne three-line images are used to validate the accuracy potential of GPS/IMU aided direct geo-referencing. Experimental results from three ADS40 datasets show that the exterior orientation elements provided by GPS/IMU is of perfect accuracy, which positioning error on horizontal direction is better than 2.5 pixels and on the vertical direction is better than 5.1 pixels. Test results also show that systematic measurement error is existed for GPS/IMU system, so a few control points are still necessary in aerial triangulation for large scale mapping.

关 键 词：GPS/IMU 三线阵 直接定位 外方位元素 前方交会 

分 类 号：P231.2[天文地球—摄影测量与遥感]