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Impact of Sea-Ice Thickness and Permittivity on Polarimetric GNSS-Reflectometry Data Acquired During the MOSAiC Expedition

Liu, Baojian und Lei, Rubio und Wan, Wei und Xia, Junming und Semmling, Maximilian und Zhang, Jie und Xu, Yue und Sun, Yueqiang und Spreen, Gunnar (2025) Impact of Sea-Ice Thickness and Permittivity on Polarimetric GNSS-Reflectometry Data Acquired During the MOSAiC Expedition. IEEE Transactions on Geoscience and Remote Sensing. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2025.3558804. ISSN 0196-2892.

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Offizielle URL: https://ieeexplore.ieee.org/document/10960352

Kurzfassung

Global navigation satellite system reflectometry (GNSS-R) has long been explored for retrieving sea ice properties, but in situ validation in the central Arctic during the freezing season is rare, limiting its application. The primary objective of this study is to advance the current understanding of multipolarization GNSS-R remote sensing for sea ice application. This article presents observations from the full-polarization GNSS-R (FpolGNSSR) prototype during the multidisciplinary drifting observatory for the study of Arctic climate (MOSAiC) expedition. The FpolGNSSR, with four polarization channels and high antenna gain (11.3 dB), aims to assess the impact of sea-ice thickness and permittivity on GNSS-R data, with observations from October 2019 to January 2020, the onset period of ice growth. First, the reflectivity is simulated by a four-layer model, and the sensitivity of multipolarization GNSS-R to sea ice is qualitatively analyzed. Subsequently, a simplified model reveals a linear relationship between reflectivity and ice thickness, with regression showing a correlation of 0.74 ( P<0.01 ). The retrieval root mean square error (RMSE) of sea-ice thickness retrieval is 0.13 m for first-year ice (0.3-1.0 m thick). Additionally, the imaginary component of sea ice permittivity is estimated, between 0.018 and 0.039. This study provides valuable insights for the GNSS-R community, which could be summarized as: 1) the "H-polarization advantage," which is first proposed in sea ice GNSS-R; 2) the validity of a simplified model, reinforcing the feasibility of satellite-based sea-ice thickness estimations using left-hand-circular, V-, and H-polarizations; and 3) a lower apparent permittivity of GNSS-R than previously reported, corresponding to a deeper penetration depth.

elib-URL des Eintrags:https://elib.dlr.de/216659/
Dokumentart:Zeitschriftenbeitrag
Titel:Impact of Sea-Ice Thickness and Permittivity on Polarimetric GNSS-Reflectometry Data Acquired During the MOSAiC Expedition
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Liu, BaojianSchool of Soil and Water Conservation Beijing Forestry University Beijing, ChinaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Lei, RubioPolar Research Institute of China, Shanghai, ChinaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Wan, WeiInstitute of Remote Sensing and GIS School of Earth and Space Sciences Peking University, Beijing, ChinaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Xia, JunmingNational Space Science Center Chinese Academy of Sciences, Beijing, ChinaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Semmling, MaximilianMaximilian.Semmling (at) dlr.dehttps://orcid.org/0000-0002-5228-8072NICHT SPEZIFIZIERT
Zhang, JieSchool of Earth and Space Sciences, Peking University, Beijing, ChinaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Xu, YueSchool of Earth and Space Sciences, Peking University, Beijing, ChinaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Sun, YueqiangNational Space Science Center, Chinese Academy of Sciences, Beijing, PR China.NICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Spreen, GunnarInstitute of Environmental Physics, University of Bremen, Bremen, Germany (gunnar.spreen (at) uni-bremen.de)https://orcid.org/0000-0003-0165-8448NICHT SPEZIFIZIERT
Datum:2025
Erschienen in:IEEE Transactions on Geoscience and Remote Sensing
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
DOI:10.1109/TGRS.2025.3558804
Verlag:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:veröffentlicht
Stichwörter:GNSS-R, MOSAiC, sea-ice permittivity, sea-ice thickness
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Kommunikation, Navigation, Quantentechnologien
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R KNQ - Kommunikation, Navigation, Quantentechnologie
DLR - Teilgebiet (Projekt, Vorhaben):R - Ionosphäre
Standort: Neustrelitz
Institute & Einrichtungen:Institut für Solar-Terrestrische Physik > Weltraumwetterbeobachtung
Hinterlegt von: Semmling, Dr. Maximilian
Hinterlegt am:22 Sep 2025 09:48
Letzte Änderung:22 Sep 2025 09:48

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