Evaluation of models proposed for the 1991 revision of the International Geomagnetic Reference Field
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Abstract
The 1991 revision of the International Geomagnetic Reference Field (IGRF) comprises a definitive main-field model for 1985.0, amain-field model for 1990.0, and a forecast secular-variation model for the period 1990-1995. The five 1985.0 main-field models and five 1990.0 main-field models that were proposed have been evaluated by comparing them with one another, with magnetic observatory data, and with Project MAGNET aerial survey data. The three secular-variation models that were proposed have also been compared with one another, and with estimates of recent rates of change at the observatories. The comparisons indicate that the main-field models proposed by IZMIRAN, and the secular-variation model proposed jointly by the British Geological Survey and the U. S. Naval Oceanographic Office, should be assigned relatively lower weight in the derivation of the new IGRF models.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Evaluation of models proposed for the 1991 revision of the International Geomagnetic Reference Field |
| Series title | Journal of Geomagnetism & Geoelectricity |
| DOI | 10.5636/jgg.44.793 |
| Volume | 44 |
| Issue | 9 |
| Year Published | 1992 |
| Language | English |
| Publisher | J-STAGE |
| Description | 11 p. |
| First page | 793 |
| Last page | 803 |
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