The IZMIRAN main magnetic field candidate model for IGRF-10, produced by a spherical harmonic-natural orthogonal component method

被引：7

作者：

Golovkov, VP ^{[1
]}

Zvereva, TI ^{[1
]}

Chernova, TA ^{[1
]}

机构：

[1] IZMIRAN, Ionosphere & Radio Wave Propagat, Inst Terr Magenetism, Troitsk 142190, Russia

来源：

EARTH PLANETS AND SPACE | 2005年 / 57卷 / 12期

基金：

俄罗斯基础研究基金会;

关键词：

secular variation; satellite data; natural orthogonal components; spherical harmonic models;

D O I：

10.1186/BF03351900

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A simple method is proposed for constructing a space-time model of the main magnetic field based on the high-accuracy satellite survey data. At the first stage, we expand the CHAMP daily mean data into spherical harmonics with constant coefficients. It provides us with a series of the daily mean spherical-harmonic models (DMM) over a survey interval of several years, which are, then, expanded into the natural orthogonal components (NOC). It is shown that the NOC series converges rapidly, and that the accuracy of the space-time model over the time interval under consideration is no worse than the accuracy of the traditional models.

引用

页码：1165 / 1171

页数：7