IGRF- Version 4.0: calculates the earths magnetic field components. 10th generation IGRF model coefficients are used - Variety of uses in teaching and research.

	Calculates the magnetic field components with height, latitude, longitude or date (inbuilt years from 1940 to about 2010).
	Also calculates profiles of magnetic field values with changing height, latitude, longitude or date.
	Can be updated simply with new coefficients, when they become available, without re-compiling. Coefficients used can be configured to any suitable IGRF model.
	Extensive help file explaining the operation of the program.
	Works under windows (NT, 95,98, 2000)- self installing software, with extensive help. Written by Mark W Hounslow

The above screen shot shows, in the upper part the main IGRF dialog, indicating the data entry form for calculation of a snapshot of the IGRF values. The lower window shows a latitude profile of IGRF values at a specified longitude.

Downloads

Before downloading, please read the license agreement for using this freeware, which is applicable to both the compiled program and the source code. The compiled program is contained in a zip file, which should be first unzipped in a temporary directory, using a tool such as Winzip. The program is self installing, simply click on the setup.exe.

The source code (currently version 3.0), written is Microsoft Visual C++ (version 6.0) and Fortran, is also available free. Before you download the source code, you should read the requirements.

If you have a problem looking at the help file with the program when using Windows Vista. Load the this update from Microsoft, which will install the missing help-file viewer.