IGRF Magnetic Field

Compute IGRF mean earth magnetic field

Description

MATLAB implementation of IGRF11 fortran code as function for calculating Earth mean magnetic field. Implementation has been modified to default to GPS reference coordinates with output B components North, East, and Vertical. Spherical harmonic coefficients are derived from downloaded Excel file.
http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html

Screenshot created by Demo_igrf11syn

• Acknowledgements: This submission has inspired the following:; International Geomagnetic Reference Field (IGRF) Model
• MATLAB release: MATLAB 7.11 (2010b)

[Mark Shore]

File is insufficiently documented (for example, the spherical coefficients have to be loaded before the main program can run) and post 2009 results differ significantly from those calculated by other software implementations of IGRF.

[Joaquim Luis]

You may want to look at this too.
It's very fast (MEX) and point-and-click driven

http://sites.google.com/site/mironehowtos/geophysics/display-the-earth-magnetic-field

[Mark Shore]

Documentation has been improved and the function now returns proper values for the current epoch. A useful IGRF tool for MATLAB users that can be used for individual points or for global grids. No limit checking on lat/lon values; users will need to check their own inputs.

[Brian]

This is straight forward and easy to use.