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Ørsted Initial Field Model
Author(s) -
Olsen N.,
Holme R.,
Hulot G.,
Sabaka T.,
Neubert T.,
TøffnerClausen L.,
Primdahl F.,
Jørgensen J.,
Léger J.M.,
Barraclough D.,
Bloxham J.,
Cain J.,
Constable C.,
Golovkov V.,
Jackson A.,
Kotzé P.,
Langlais B.,
Macmillan S.,
Mandea M.,
Merayo J.,
Newitt L.,
Purucker M.,
Risbo T.,
Stampe M.,
Thomson A.,
Voorhies C.
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl011930
Subject(s) - epoch (astronomy) , earth's magnetic field , physics , magnetic field , geodesy , geophysics , scalar (mathematics) , degree (music) , spherical harmonics , computational physics , geology , astrophysics , mathematics , geometry , stars , quantum mechanics , acoustics
Magnetic measurements taken by the Ørsted satellite during geomagnetic quiet conditions around January 1, 2000 have been used to derive a spherical harmonic model of the Earth's magnetic field for epoch 2000.0. The maximum degree and order of the model is 19 for internal, and 2 for external, source fields; however, coefficients above degree 14 may not be robust. Such a detailed model exists for only one previous epoch, 1980. Achieved rms misfit is <2 nT for the scalar intensity and <3 nT for one of the vector components perpendicular to the magnetic field. For scientific purposes related to the Ørsted mission, this model supercedes IGRF 2000.