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鉴于国际地磁场模式中没有应用到中国的地磁观测数据,要把国际地磁参考场(IGRF)作为中国的地磁背景场,那么地磁场各要素在各地区的差别是怎样呢?为了弄清这个问题,以利大家实际的应用,本文采用了几个方面的地磁观测数据与IGRF1980基本磁场(MF)、长期变化(SV)模式的计算值进行比较。(1)利用地磁台的年均值和年变率与IGRF1980模式的计算值比较;(2)利用1980.0中国复测点的观测值与其比较,(3)1980.0中国地磁场模式与IGRF1980的MF和SV模式相互比较。
Given that there is no geomagnetic data applied to China in the international geomagnetic field model, IGRF should be taken as the geomagnetic background field in China. What is the difference between geomagnetic components in different regions? In order to clarify this issue , In order to facilitate the practical application, we use several aspects of geomagnetic observations and IGRF1980 basic magnetic field (MF), long-term changes (SV) mode of comparison calculated. (1) Comparing the annual mean and annual variation rates of geomagnetic stations with the calculated values of IGRF1980 model; (2) Comparing the observed values of the 1980s China re-entry point; (3) 1980.0 China’s geomagnetic field model and the IGRF1980 MF and SV The patterns are compared with each other.