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| Titel |
Least-squares multi-spacecraft gradient calculation with automatic error estimation |
| VerfasserIn |
J. Keyser |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 26, no. 11 ; Nr. 26, no. 11 (2008-10-21), S.3295-3316 |
| Datensatznummer |
250016272
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| Publikation (Nr.) |
 copernicus.org/angeo-26-3295-2008.pdf |
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| Zusammenfassung |
| Multi-spacecraft missions allow the gradient of important physical quantities
in the terrestrial environment to be determined. The gradient can be computed
from four simultaneous measurements in a straightforward way, but this
computation does not produce proper error estimates, making it hard to assess
the meaningfulness of the result. Recently developed least-squares gradient
computation techniques offer the possibility to obtain more precise results
with all-inclusive error estimates, provided that information about the
non-linearity of the space and time variations of the observed quantity is
given. The present paper describes several heuristics for estimating these
variations, thereby enabling a fully automatic computation of the gradient
and the associated error estimates. The performance of these heuristics is
illustrated with synthetic data corresponding to 4- and 10-spacecraft
configurations. |
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