Sea-ice concentration derived from GNSS reflection measurements in Fram Strait

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dc.contributor.authorSemmling, A. Maximilian
dc.contributor.authorRösel, Anja
dc.contributor.authorDivine, Dmitry V.
dc.contributor.authorGerland, Sebastian
dc.contributor.authorStienne, Georges
dc.contributor.authorRebul, Serge
dc.contributor.authorLudwig, Marcel
dc.contributor.authorWickert, Jens
dc.contributor.authorSchuh, Harald
dc.date.accessioned2021-04-29T07:24:00Z
dc.date.available2021-04-29T07:24:00Z
dc.date.issued2019-09-05
dc.description.abstractReflection power derived from the global navigation satellite system (GNSS) observations and its sensitivity to sea-ice concentration are investigated in this article. A corresponding experiment has been conducted during the Fram Strait cruise of the Norwegian research vessel Lance in summer 2016. The dedicated setup with a GNSS Occultation Reflectometry Scatterometry (GORS) receiver and dual-polarization (left- and right-handed) antenna links recorded 1922 h of reflection events during the 20-day cruise of the ship. The antenna setup, mounted 25.0 m above the waterline, serves to acquire sea surface reflections at grazing angles below 30°. Within a 5-min coherent integration period, direct and reflected signal contributions can be separated. Except for the highest sea states, with roll angle changes of 20° peak to peak, the separation allows to retrieve the reflection power and quantifies it in cross-, co-, and cross-to-co-polar ratios. The sea-ice concentration is inverted from power ratios using a non-linear least-squares algorithm. Additional data on sea-ice concentration gathered by a watchman on the ship are used for validation. The inversion results have a 20% resolution in concentration and 3-h resolution in time. The validation shows that the cross- and cross-to-co-polar data are sensitive to the sea-ice concentration. The respective Pearson correlation of 0.75 and 0.67 further suggests studies to foster the application of the GNSS data for sea-ice reflectometry.en
dc.identifier.eissn1558-0644
dc.identifier.issn0196-2892
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/13082
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-11878
dc.language.isoenen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.ddc550 Geowissenschaftende
dc.subject.otherradar applicationsen
dc.subject.otherreflectometryen
dc.subject.othersatellite navigation systemsen
dc.subject.othersea-ice concentrationen
dc.titleSea-ice concentration derived from GNSS reflection measurements in Fram Straiten
dc.typeArticleen
dc.type.versionacceptedVersionen
dcterms.bibliographicCitation.doi10.1109/TGRS.2019.2933911en
dcterms.bibliographicCitation.issue12en
dcterms.bibliographicCitation.journaltitleIEEE Transactions on Geoscience and Remote Sensingen
dcterms.bibliographicCitation.originalpublishernameIEEEen
dcterms.bibliographicCitation.originalpublisherplaceNew York, NYen
dcterms.bibliographicCitation.pageend10361en
dcterms.bibliographicCitation.pagestart10350en
dcterms.bibliographicCitation.volume57en
tub.accessrights.dnbfreeen
tub.affiliationFak. 6 Planen Bauen Umwelt::Inst. Geodäsie und Geoinformationstechnik::FG Satellitengeodäsiede
tub.affiliation.facultyFak. 6 Planen Bauen Umweltde
tub.affiliation.groupFG Satellitengeodäsiede
tub.affiliation.instituteInst. Geodäsie und Geoinformationstechnikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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