无地面控制GPS辅助光束法区域网平差  

GPS-supported Bundle Block Adjustment Without Ground Control Points

作　　者：袁修孝[1] 朱武[2] 武军郦[2] 王瑞幺[2] 

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]国家基础地理信息中心

出　　处：《武汉大学学报（信息科学版）》2004年第10期852-857,共6页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40171072);高等学校全国优秀博士学位论文作者专项资金资助项目(200142);湖北省新世纪高层次人才工程专项基金资助项目。

摘　　要：介绍了在WGS84坐标系中进行GPS辅助光束法区域网平差的基本原理以及利用大地水准面拟合方法实施大地高与正常高的变换方法。利用新疆库尔勒地区1∶25000和1∶50000实际航摄资料验证了理论与程序实现的正确性。试验结果表明,无地面控制GPS辅助光束法区域网平差可用于中小比例尺测图的加密,在WGS84坐标系中可以获得较高的点定位精度,而在国家80坐标系下,利用大地水准面拟合前后的GPS摄站坐标进行GPS辅助光束法区域网平差,加密精度没有明显差异。This paper describes briefly the basic principle of GPS-supported bundle block adjustment in WGS-84 coordinate system and the transfomation method between geodetic height in WGS-84 coordinate system and nomal height in 80' Xian geodetic coordinate system by using the geoid model CQG2000. The algorithms are programmed and tested on two sets of actual aerial photographs, at the image scale of 1∶25 000 and 1∶50 000, with airborne GPS data taken from Xinjiang site in China. The GPS-supported bundle block adjustment is conducted by the software WuCAPS GPS .The 1∶25 000 photos are processed with 4 XYZ ground control points around the corners of block area, and the 1∶50 000 photos are adjusted without any ground control point. The experimental results have verified that the accuracies of GPS-supported bundle block adjustment under different coordinate systems are very close.

关 键 词：GPS辅助光束法平差 无地面控制 高程异常 精度 

分 类 号：P231.4[天文地球—摄影测量与遥感]