北京地磁台天文方位角测量及误差分析  

Azimuth measurement and error analysis at Beijing geomagnetic observatory

作　　者：周锦屏[1,2,3] 黄蔚北[1,2,3] 程安龙 高祥真[1,2,3] 邱鹏程 尤立新 聂华山 赵学敏[1,2,3] 

机构地区：[1]国家地震局地球物理研究所 [2]乌鲁木齐地震台 [3]青海省格尔木地震台

出　　处：《地震地磁观测与研究》1997年第6期73-79,共7页Seismological and Geomagnetic Observation and Research

摘　　要：论述了北京地磁台天文方位标志的选点定位、造标埋设、方位角的测量方法。对８个观测墩位一个测点进行了方位角测量。通过计算方位角绝对精度ΔＡ＝２．４９″，平均观测均方差Ｍ＝±１．１４″，相当于三等天文观测精度，能满足地磁偏角６″的精度要求。Two azimuth marks at Beijing Geomagnetic Observatory have been reset. We have measured the direction from 8 observing pillars to the azimuth mark. A new method of measuring the azimuth has been described. The accuracy of 2.49″±1.14″ is achieved by using this method. This accuracy which is in a certain degree of the third class astronomical observation can satisfy the requirement of 6″ accuracy for measuring the declination of the geomagnetic field.

关 键 词：地磁台 天文方位角测量 误差分析 地磁偏角 

分 类 号：P315.6[天文地球—地震学]