Determination of the IGRF 2000 model

Details Determination of the IGRF 2000 model Determination of the IGRF 2000 model

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ep%26s...52.1175o&link_type=abstract

Earth, Planets and Space, Volume 52, p. 1175-1182.

Physics

25

Scientific paper

The IGRF 2000 has been estimated from magnetic measurements taken by the Ørsted sattelite in summer 1999. For this purpose, three models have been derived: The first two models were estimated using a few geomagnetic quiet days in May and September 1999, respectively. The third model, called Oersted(10c/99), was derived from scalar data spanning six months and vector data spanning four months. In order to get a model for epoch 2000.0, the IGRF 95 secular variaion model has been applied to the data. The IGRF 2000 model was taken to be the internal degree/order 10 portion of Oersted(10c/99). We describe the data selection, model parameterization, parameter estimation and an evaluation of the three models.

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