International Geomagnetic Reference Field: the eleventh generation

The eleventh generation of the International Geomagnetic Reference Field (IGRF)was adopted in December 2009 by the International Association of Geomagnetism and Aeronomy Working Group V-MOD. It updates the previous IGRF generation with a definitive main field model for epoch 2005.0, a main field model for epoch 2010.0, and a linear predictive secular variation model for 2010.0–2015.0. In this note the equations defining the IGRF model are provided
\nalong with the spherical harmonic coefficients for the eleventh generation. Maps of the magnetic declination, inclination and total intensity for epoch 2010.0 and their predicted rates of change for 2010.0–2015.0 are presented. The recent evolution of the South…

• NS
  National Science Foundation
• NA
  National Aeronautics and Space Administration
• BF
  Bundesministerium für Wirtschaft und Technologie
• CN
  Centre National d’Etudes Spatiales
• HÍ
  Háskóli Íslands
• CN
  Comisión Nacional de Actividades Espaciales
• US
  Universität Stuttgart
• ID
  Institut de Physique du Globe de Paris
• II
  Indian Institute of Geomagnetism