Deriving main field and secular variation models from synthetic Swarm satellite and observatory data

Lesur, V.; Macmillan, S.; Thomson, A.W.P.. 2006 Deriving main field and secular variation models from synthetic Swarm satellite and observatory data. Earth, Planets and Space, 58 (4). 409-416.

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Abstract/Summary

simulator can be recovered when relatively simple geomagnetic field models are fitted to synthetic Swarm satellite and observatory data. In particular we demonstrate the potential benefits of Swarm by deriving models without these data. From two years of observatory data, the underlying secular variation model is recovered up to about spherical harmonic degree 8. This maximum degree is higher than was expected but increases to 10 when satellite data are also used. The constant part of the geomagnetic field model is recovered to at least degree 17. These results improve when a better statistical treatment of the data errors is made, a slightly more complex field model is fitted, or when five years of data are used. Key words: Geomagnetism, geomagnetic field, swarm.

Item Type:	Publication - Article
Programmes:	BGS Programmes > Seismology and Geomagnetism
ISSN:	1880-5981
Additional Keywords:	Geolmagnetic field, Swarm, statistical, geomagnetism
NORA Subject Terms:	Earth Sciences Space Sciences
Related URLs:	http://www.terrapub.co.jp/journals
Date made live:	24 Jul 2007 08:53 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/207

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