测地坐标系中子午线收敛角的直接解式  

Explicit Formula of Meridianal Convergence in Geodesic Coordinate System

作　　者：朱紫阳[1] 施一民[2] 

机构地区：[1]广东省国土资源厅测绘院信息工程站,广东广州510500 [2]同济大学测量与国土信息工程系,上海200092

出　　处：《同济大学学报（自然科学版）》2003年第8期968-971,共4页Journal of Tongji University:Natural Science

基　　金：地球空间环境与大地测量教育部重点实验室开放基金资助项目 (0 3 -0 4-0 2 )

摘　　要：提出并推导了测地坐标系中一点上子午线收敛角的直接解式 .该解式直接采用该点的测地坐标来求解子午线收敛角 ,从而能方便地将测地坐标系中任一大地线的方向角转换为大地方位角 .数据验证表明 ,舍去高次项后的简易公式也足以满足一定范围内地理信息系统 (GIS)The explicit formula of the meridianal convergence of a point in the geodesic coordinate system is introduced and deduced in this paper.In order to transform conveniently the directional angle of a geodesic line into the geodetic azimuth,the solution of the meridianal convergence is expressed by geodesic coordinates of this point.The simplified formula can also be satisfied for the application of the middle size,which has been demonstrated by examples.

关 键 词：大地方位角 方向角 测地坐标系中子午线收敛角 测地平行线 

分 类 号：P128.1[天文地球—天体测量]