 |
| Titel |
Determination of the Earth's lithospheric magnetic field using vector gradient data from the Swarm satellite constellation |
| VerfasserIn |
Stavros Kotsiaros, Chris Finlay, Nils Olsen |
| Konferenz |
EGU General Assembly 2015
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250111726
|
| Publikation (Nr.) |
 EGU/EGU2015-11865.pdf |
|
|
|
|
|
| Zusammenfassung |
| One of the main goals of the Swarm three-satellite constellation mission is to determine the
lithospheric field globally with the best possible resolution. To achieve that, explicit
advantage of the constellation aspect of Swarm has to be taken by using gradient estimates.
We derive lithospheric field models using more than one year of East-West and North-South
magnetic gradient data, approximated by first differences of field vector data between the
two lower Swarm satellites and along each satellite orbit, respectively. Despite the
current relatively high altitude of 450 km of the Swarm satellites, the results are
promising. We find that Swarm gradient data are less sensitive to large-scale external
field fluctuations and enhance the resolution of the determined lithospheric field
compared to only vector data. The derived models agree very well with previous models
derived from CHAMP data, serving as an initial validation of the Swarm mission. |
|
|
|
|
|
|