Stefko, Marcel und Bernhard, Philipp und Frey, Othmar und Hajnsek, Irena (2024) Polarimetric analysis of bi-seasonal monostatic and bistatic radar observations of a glacier accumulation zone at Ku-band. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Seiten 1-22. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/JSTARS.2024.3374051. ISSN 1939-1404.
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Offizielle URL: https://ieeexplore.ieee.org/document/10475388
Kurzfassung
We present ground-based Ku-band radar observations of the snow cover on top of the Great Aletsch Glacier carried out over two observation periods, in August 2021 and in March 2022. The observations were carried out with the combined mono/bistatic version of KAPRI, a full-polarimetric radar system, and revealed substantial differences between the scattering behaviour of the snow cover between the two seasons. We analyze the spatial and temporal behaviour of parameters including temporal decorrelation, the scattering entropy, the mean polarimetric alpha angle, and the co- and cross-polarized phase differences. The results indicate that snow cover decorrelates at Ku-band on the timescales of 4-12 hours in winter and summer, which has implications for repeat-pass methods with long temporal baselines. The analysis of the co-polarized phase difference in winter indicates that the parameter is prone to phase wrapping. In summer, its value exhibits smooth spatial trend and a strong sensitivity to changes in incidence angle and liquid water content. The bistatic cross-polarized phase difference also acquires a non-zero value, indicating the presence of non-reciprocal scattering, which has implications for possible calibration procedures of bistatic systems. The presented results aim to serve as a reference for snow scattering behaviour at Ku-band, which can aid planning of future data acquisition campaigns and satellite missions.
elib-URL des Eintrags: | https://elib.dlr.de/203381/ | ||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||
Titel: | Polarimetric analysis of bi-seasonal monostatic and bistatic radar observations of a glacier accumulation zone at Ku-band | ||||||||||||||||||||
Autoren: |
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Datum: | 19 März 2024 | ||||||||||||||||||||
Erschienen in: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||
Gold Open Access: | Ja | ||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||
DOI: | 10.1109/JSTARS.2024.3374051 | ||||||||||||||||||||
Seitenbereich: | Seiten 1-22 | ||||||||||||||||||||
Verlag: | IEEE - Institute of Electrical and Electronics Engineers | ||||||||||||||||||||
Name der Reihe: | IEEE Explore | ||||||||||||||||||||
ISSN: | 1939-1404 | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | Snow, Scattering, Spaceborne radar,Decorrelation,Glaciers,Radar polarimetry, Bistatic radar,snow remote sensing,polarimetry,interferometry | ||||||||||||||||||||
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 - Polarimetrische SAR-Interferometrie HR | ||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||
Institute & Einrichtungen: | Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte | ||||||||||||||||||||
Hinterlegt von: | Radzuweit, Sibylle | ||||||||||||||||||||
Hinterlegt am: | 21 Mär 2024 11:44 | ||||||||||||||||||||
Letzte Änderung: | 21 Mär 2024 11:44 |
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