The Ørsted Satellite Project

A Danish Microsatellite With a High Scientific Profile

Papers and reports


THE 2000 REVISION OF THE JOINT UK/US GEOMAGNETIC FIELD MODELS AND AN IGRF2000 CANDIDATE MODEL

 

Macmillan, S. (1), and J.M. Quinn (2)

 

  1. British Geological Survey, Murchison House, West Mains Road, Edinburgh, EH9 3LA, UK. E-mail: smac@bgs.ac.uk
  2. United States Geological Survey, MS 966, Federal Center, Denver, CO 80225-0046, USA. E-mail: quinn@ghtmail.cr.usgs.gov

 

Abstract. The method of derivation of the joint UK/US spherical harmonic geomagnetic main-field and secular-variation models is presented. Early versions of these models, with the main field truncated at degree 10, are the UK/US candidates for the IGRF2000 model. The main-field model describes the Earth's magnetic field at the 2000.0 epoch, while the secular-variation model predicts the evolution of this field between 2000.0 and 2005.0. A revised 1995.0 main-field model was also generated. Regional models for the continental US, Alaska and Hawaii were also produced as a by-product of the UK/US global modelling effort.