Ørsted Initial Field Model

• DOI: 10.1029/2000gl011930
• Publication Date: 2004-02-05T00:12:15Z
• Authors: N. Olsen; R. Holme; G. Hulot; T. Sabaka; T. Neubert; L. Tøffner‐Clausen; F. Primdahl; J. Jørgensen; J.‐M. Léger; D. Barraclough; J. Bloxham; J. Cain; C. Constable; V. Golovkov; A. Jackson; P. Kotzé; B. Langlais; S. Macmillan; M. Mandea; J. Merayo; L. Newitt; M. Purucker; T. Risbo; M. Stampe; A. Thomson; C. Voorhies
• Keywords: Epoch (astronomy); Degree (music)

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 Earth's magnetic field for epoch 2000.0. The maximum degree and order is 19 internal, 2 external, source fields; however, coefficients above 14 may not be robust. Such detailed exists only one previous epoch, 1980. Achieved rms misfit <2 nT scalar intensity <3 vector components perpendicular field. For scientific purposes related mission, this supercedes IGRF 2000.