海岛礁地磁测量时短边真北方位角的确定及精度分析  

The Confirmation Method and Its Accuracy Analysis of Short Side's True North Bearing in Island Reef Geomagnetic Survey

作　　者：许家琨[1] 王双喜[1] 汪平[1] 孙雪洁[1] 

机构地区：[1]92899部队

出　　处：《海洋测绘》2012年第2期15-17,21,共4页Hydrographic Surveying and Charting

摘　　要：在海岛礁地磁测量中,针对一些岛屿面积较小、地磁测点与方位点边长较短的情况,讨论了GPS短边真北方位测量的具体解算方法,分析了短边GPS方位测量的精度情况,并提出了海岛礁地磁测量短边真北方位角测量的一些具体方法和建议,试验证明方法能提高海岛礁地磁测量的效率。The calculation method of GPS short side＇s true north bearing was discussed,the azimuth angle survey accuracy of the short side was also analyzed in the paper.According to the island reef geomagnetic survey work experience,some methods and advice of short side＇s true north bearing survey were summarized.The experimental results show that the efficiency of geomagnetic survey is enhanced.

关 键 词：地磁测量 磁偏角 GPS 方位角 真北方向 

分 类 号：P318.63[天文地球—固体地球物理学]