GEOMAGNETIC SECULAR ACCELERATION

被引:17
作者
BARRACLOUGH, DR
MALIN, SRC
机构
[1] Institute of Geological Sciences, Edinburgh, EH9 3LA, Murchison House, West Mains Road
来源
GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY | 1979年 / 58卷 / 03期
关键词
D O I
10.1111/j.1365-246X.1979.tb04807.x
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Summary. A spherical harmonic model of the second time‐derivative of the geomagnetic field is determined, for the first time, directly from measures of the secular acceleration based on observatory annual mean data. The data span the interval 1964.5–1975.5, and 165 observatories are included. The model comprises the 32 coefficients of degree and order up to 6 that are significant at the 5 per cent level. Its primary purpose is to aid in the reduction of data to epoch for the 1980 series of navigational charts. The model is compared with earlier estimates of secular acceleration, derived by less direct methods. Copyright © 1979, Wiley Blackwell. All rights reserved
引用
收藏
页码:785 / 793
页数:9
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