Wendleder, Anna und Heilig, Achim und Schmitt, Andreas und Mayer, Christoph (2015) Monitoring of wet snow and accumulations at high alpine glaciers using radar technologies. In: International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, Seiten 1063-1068. 36th International Symposium on Remote Sensing of Environment, 2015-05-11 - 2015-05-15, Berlin, Deutschland. doi: 10.5194/isprsarchives-XL-7-W3-1063-2015. ISSN 1682-1750.
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Offizielle URL: http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-7-W3/1063/2015/isprsarchives-XL-7-W3-1063-2015.pdf
Kurzfassung
Conventional studies to assess the annual mass balance for glaciers rely on single point observations in combination with model and interpolation approaches. Just recently, airborne and spaceborne data is used to support such mass balance determinations. Here, we present an approach to map temporal changes of the snow cover in glaciated regions of Tyrol, Austria, using SAR-based satellite data. Two dual-polarized SAR images are acquired on 22 and 24 September 2014. As X and C-band reveal different backscattering properties of snow, both TerraSAR-X and RADARSAT-2 images are analysed and compared to ground truth data. Through application of filter functions and processing steps containing a Kennaugh decomposition, ortho-rectification, radiometric enhancement and normalization, we were able to distinguish between dry and wet parts of the snow surface. The analyses reveal that the wet-snow can be unambiguously classified by applying a threshold of -11 dB. Bare ice at the surface or a dry snowpack does not appear in radar data with such low backscatter values. From the temporal shift of wet-snow, a discrimination of accumulation areas on glaciers is possible for specific observation dates. Such data can reveal a periodic monitoring of glaciers with high spatial coverage independent from weather or glacier conditions.
elib-URL des Eintrags: | https://elib.dlr.de/100506/ | ||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||
Titel: | Monitoring of wet snow and accumulations at high alpine glaciers using radar technologies | ||||||||||||||||||||
Autoren: |
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Datum: | Mai 2015 | ||||||||||||||||||||
Erschienen in: | International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||
DOI: | 10.5194/isprsarchives-XL-7-W3-1063-2015 | ||||||||||||||||||||
Seitenbereich: | Seiten 1063-1068 | ||||||||||||||||||||
ISSN: | 1682-1750 | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | SAR, polarimetry, backscattering, classification, snow, snow mapping | ||||||||||||||||||||
Veranstaltungstitel: | 36th International Symposium on Remote Sensing of Environment | ||||||||||||||||||||
Veranstaltungsort: | Berlin, Deutschland | ||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||
Veranstaltungsbeginn: | 11 Mai 2015 | ||||||||||||||||||||
Veranstaltungsende: | 15 Mai 2015 | ||||||||||||||||||||
Veranstalter : | DLR | ||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Vorhaben Fernerkundung der Landoberfläche (alt) | ||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||
Institute & Einrichtungen: | Deutsches Fernerkundungsdatenzentrum > Landoberfläche | ||||||||||||||||||||
Hinterlegt von: | Wendleder, Anna | ||||||||||||||||||||
Hinterlegt am: | 16 Dez 2015 13:26 | ||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:05 |
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