磁法正常场计算软件（来源于美国国家地球物理中心）

cug0204

直接双击“geomag70”就是按单点方式计算的，然后根据提示，输入模型数据文件名（igrf11.cof）,选择日期类型（例如：2），计算时间（例如：1天，选择1），依次输入：年、月、日；再选择参考坐标系（例如：1，GPS经纬度坐标和水准高），选择高程单位（例如：1，即公里），输入计算点的海拔高程（例如：0km）,输入度分秒格式（例如：2），再依次输入经纬度的度分秒，先纬度，后经度。最后结果出现在三行虚线中间。D是磁偏角，I是磁倾角，F是总场。输入“0” 退出


geomag70_windows.rar (103.77 KB, 下载次数: 383)

2011-5-28 02:52 上传

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Geomag61_windows.rar (123.25 KB, 下载次数: 464)

2011-5-28 02:50 上传

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llccqq

先顶一个，谢谢！

勉石勉石勉石

请教楼主，geomag70_windows和Geomag61_windows有什么区别 ？？

cug0204

勉石勉石勉石 发表于 2011-5-28 08:14
请教楼主，geomag70_windows和Geomag61_windows有什么区别 ？？

一个早一些，一个晚一些。呵呵

勉石勉石勉石

楼主辛苦，再介绍下 IGRF11.COF  和 WMM2010.COF 这两个模型文件的区别！！

cug0204

勉石勉石勉石 发表于 2011-5-28 09:02
楼主辛苦，再介绍下 IGRF11.COF  和 WMM2010.COF 这两个模型文件的区别！！

The International Association of Geomagnetism and Aeronomy (IAGA) has released the 11 th Generation International Geomagnetic Reference Field — the latest version of a standard mathematical description of the Earth's main magnetic field that is used widely in studies of the Earth's deep interior, its crust and its ionosphere and magnetosphere. The coefficients for this degree and order 13 main field model were finalized by a task force of IAGA in December 2009. The IGRF is the product of a collaborative effort between magnetic field modellers and the institutes involved in collecting and disseminating magnetic field data from satellites and from observatories and surveys around the world.
The IGRF is a series of mathematical models of the Earth's main field and its annual rate of change (secular variation). In source-free regions at the Earth's surface and above, the main field, with sources internal to the Earth, is the negative gradient of a scalar potential V which can be represented by a truncated series expansion:

The 11 th Generation IGRF coefficients were computed from candidate sets of coefficients produced by the participating members of IAGA Working Group V-MOD. Their institutes and the many organisations involved in operating magnetic survey satellites, observatories, magnetic survey programmes and World Data Centers are to be thanked for their continuing support of the IGRF project.

详细参看http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html

cug0204

cug0204 发表于 2011-5-28 09:14
The International Association of Geomagnetism and Aeronomy (IAGA) has released the 11 th Generatio ...

国际高精度地磁模型研究进展.rar (426.41 KB, 下载次数: 89)

2011-5-28 09:18 上传

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勉石勉石勉石

这个网站已经去看过了 ！
可以简单的理解 geomag70_windows 适合IGRF11，计算年限 2010--2015.
                        geomag61_windows适合IGRF10，计算年限 2005--2009.
但无论是geomag70 还是geomag61，工具文件下都有两个模型文件，分别与IGRF  和 WMM命名，在软件加载模型文件的时候，这两个模型问价都可以加载，但就算的结果却相差很大。
目前还没有明白原因 ！！望大家指教

zjjinhua2691

学习学习

yangqiji

学习 了解了解。