NASA NTRS · 20000092087
Orsted Initial Field Model
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 detailed models exist for only one previous epoch, 1980. Achieved rms misfit is 2 nT for the scalar intensity and 4 nT for the vector components perpendicular to the magnetic field. This model is of higher detail than the IGRF 2000, which for scientific purposes related to the Orsted mission it supersedes.
Keep this discovery
Explore connections, maps & timelines
Olsen, N., Holme, R., Hulot, G., Sabaka, T., Neubert, T., Toffner-Clausen, L., Primdahl, F., Jorgensen, J., Leger, J.-M., Barraclough, D., Smith, David E.. 2000-01-01. Orsted Initial Field Model. https://ntrs.nasa.gov/citations/20000092087
Cite the original work for its findings. Save a collection to share your selection of sources.