Abstract
Magnetic measurements taken by the Orsted 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 Orsted mission, this model supercedes IGRF 2000.
Original language | English |
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Journal | Geophysical Research Letters |
Volume | 27 |
Issue number | 22 |
Pages (from-to) | 3607-3610 |
ISSN | 0094-8276 |
DOIs | |
Publication status | Published - 15 Nov 2000 |