摘要
本文介绍了中国附近海域地磁偏角模式的建立和“中国邻近海区地磁偏角图”的编绘以及质量分析。在建立中国附近海区地磁偏角模式时，使用了3000多个地磁测点和地磁台站及国际参考地磁场资料，采用的方法是泰勒多项式。对海区地磁偏角模式和海区地磁图作了对比分析，其效果是好的。海区地磁偏角模式和“中国邻近海区地磁偏角图” 清楚地反映出我国南沙群岛地区尺度为1000余公里的磁异常，解决了中国地磁图和世界地磁图在这一海区未能解决的问题。海区地磁偏角模式的建立和海区地磁偏角图的绘制出版，大大地提高了我国海区及其邻近海域地磁偏角导航的精度。
:This article presents the creation of a geomagnetic declination model and the compilation and charting (1990.0) as well as the quality analysis of the neigh bouring seas of China. The declination model is created by using Taylor polyno mial, with the data from more than 3000 survey sites and certain observatories including that of international geomagnetic reference field. The comparative anurysis of declination model and IGRF shows satisfactory results. Especially the geomagnetic anomaly to a scale of 1000kmin the Nansha Islands area, which appeared neither on the former Chinese geomagnetic chart nor on the world ones, are now clearly presented on the neV chart. This research has ensured a much higher accuracy of declination navigation in Chinese waters and the neighbouring seas.
出处
《测绘学报》
EI
CSCD
北大核心
1994年第1期23-28,共6页
Acta Geodaetica et Cartographica Sinica
关键词
海域
地磁图
偏角图
数学模型
:The geomagnetic deelination model, Geomagnetic declinationchart, maritime area of China
