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Titel |
A dynamic approach for evaluating coarse scale satellite soil moisture products |
VerfasserIn |
Alexander Loew, Florian Schlenz |
Konferenz |
EGU General Assembly 2011
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Medientyp |
Artikel
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Sprache |
Englisch
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 13 (2011) |
Datensatznummer |
250053584
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Zusammenfassung |
Validating coarse scale remote sensing soil moisture products requires a comparison of
gridded data to point-like ground measurements. The necessary aggregation of in situ
measurements to the footprint scale of a satellite sensor (> 100 km2) introduces uncertainties
in the validation of the satellite soil moisture product. Observed differences between the
satellite product and in situ data are therefore partly attributable to these aggregation
uncertainties. The present paper investigates different approaches to disentangle the error
of the satellite product from the uncertainties associated to the up-scaling of the
reference data. A novel approach is proposed, which allows for the quantification
of the remote sensing soil moisture error using a temporally adaptive technique.
It is shown that the point-to-area sampling error can be estimated within 0.0084 |
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