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How complimentary are SRTM X- and C-band data?

Hoffmann, Jörn und Walter, Diana (2006) How complimentary are SRTM X- and C-band data? Photogrammetric Engineering and Remote Sensing, 72 (3), Seiten 261-268.

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Offizielle URL: http://www.asprs.org/publications/pers/2006journal/march/abstracts.html#261

Kurzfassung

Two different digital elevation models (DEM) were derived during the 2000 Shuttle Radar Topography Mission from C- and X-band interferometric radar data. While these two DEMs share several of their properties, they were processed independently. Here, we investigate what can be gained by merging the two DEMs into a single composite DEM for four different test areas. Based on an analysis of the relative differences and the deviations from an absolute reference in one test area we propose an algorithm for combining the two DEMs optimally. We then compare the composite DEM with both individual DEMs and with a reference of a large number of precise GPS profiles in one test area in southern Germany. We find that in our test areas the area of missing values is reduced significantly in the composite DEM. Even compared with the more complete C-band DEM the number of void pixels can be reduced by 22% to 53%. Also, outlier values resulting from errors in the interferometric phase unwrapping can often be identified and removed in the merging. The deviations of both C- and X-band DEMs from the GPS reference are very similar and well within the accuracy specifications of the global data set. The standard deviation of the difference between the composite DEM and the reference is about 14% below that of the original values. Depending on the requirements for completeness and accuracy, merging the two SRTM elevation data sets may provide an important improvement above either of the original DEMs.

Dokumentart:Zeitschriftenbeitrag
Titel:How complimentary are SRTM X- and C-band data?
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Hoffmann, JörnNICHT SPEZIFIZIERT
Walter, DianaNICHT SPEZIFIZIERT
Datum:März 2006
Erschienen in:Photogrammetric Engineering and Remote Sensing
Referierte Publikation:Ja
In ISI Web of Science:Ja
Band:72
Seitenbereich:Seiten 261-268
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
American Society for Photogrammetry and Remote Sensing, NICHT SPEZIFIZIERT
Status:veröffentlicht
Stichwörter:Digital Elevation Models, SRTM, Validation
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Prozesse der Landoberfläche (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Deutsches Fernerkundungsdatenzentrum > Umwelt und Sicherheit > Umwelt und Geoinformation
Hinterlegt von: Dr. Jörn Hoffmann
Hinterlegt am:29 Aug 2006
Letzte Änderung:27 Apr 2009 13:01

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