Encyclopedia of Geomagnetism and Paleomagnetism

2007 Edition
| Editors: David Gubbins, Emilio Herrero-Bervera

Induction From Satellite Data

  • Steven Constable
Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-4423-6_146
How to cite
In addition to sources of internal origin, magnetic satellites record the variations in Earth's external magnetic field caused by interaction of the ionosphere and magnetosphere with the solar wind and radiation, along with the secondary magnetic fields induced in Earth. The ratio of the internal to external field may be used to probe the electrical conductivity structure of the planet. Satellite induction studies date from Didwall's ( 1984) early work with the POGO satellite data. Olsen ( 1999a) and Constable and Constable ( 2004a) provide reviews of satellite induction methods. Table I3 presents a list of past, present, and future magnetic satellite missions that are relevant to induction studies (see  MAGSAT,  Ørsted,  POGO).
Table I3

Satellite missions relevant to magnetic induction studies, as of July, 2005

Satellite

Type

Launch date

Data to

Inclination

Altitude (km)

  

POGO 2

Scalar

October 14, 1965

October 2, 1967

87.3°

410–1510

  

POGO 4

Scalar

July 28, 1967

January 19, 1969

86.0°

410–910...
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© Springer-Verlag 2007

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  • Steven Constable

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