子午线收敛角的计算精度分析及应用  

Application and Analysis of Calculation Precision of Meridian Convergence

作　　者：侯智军 梁延庆 HOU Zhijun;LIANG Yanqing(The Unit 91053 of PLA, Beijing 102202, China;Beijing Digsur Science and Technology Company Limited, Beijing 100012, China)

机构地区：[1]中国人民解放军91053部队,北京102202 [2]北京帝测科技有限公司,北京100012

出　　处：《北京测绘》2020年第9期1254-1257,共4页Beijing Surveying and Mapping

摘　　要：本文介绍了子午线收敛角的概念、计算方法和测绘三北方向及关系,通过子午线收敛角的计算,主要分析五次项计算收敛角和简化公式计算收敛角的精度,通过数据验证得出在精度要求不高的情况下,近似计算公式完全可以代替五次项公式计算收敛角。The concept of meridian convergence,calculation method,three-north direction relationship is introduced.Through calculation of meridian convergence,the precision of meridian convergence calculated by quintic terms and simplified formula is mainly analyzed.Through data verification,it is concluded that under the condition of low precision requirement,approximate calculation formula can completely replace quintic terms formula to calculate convergence.

关 键 词：子午线收敛角 大地方位角 坐标方位角 经差 纬度 

分 类 号：P226.3[天文地球—大地测量学与测量工程]