Can GNSS reflectometry detect precipitation over oceans?

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dc.contributor.authorAsgarimehr, Milad
dc.contributor.authorZavorotny, Valery
dc.contributor.authorWickert, Jens
dc.contributor.authorReich, Sebastian
dc.date.accessioned2020-01-28T09:24:02Z
dc.date.available2020-01-28T09:24:02Z
dc.date.issued2018-11-06
dc.description.abstractFor the first time, a rain signature in Global Navigation Satellite System Reflectometry (GNSS‐R) observations is demonstrated. Based on the argument that the forward quasi‐specular scattering relies upon surface gravity waves with lengths larger than several wavelengths of the reflected signal, a commonly made conclusion is that the scatterometric GNSS‐R measurements are not sensitive to the surface small‐scale roughness generated by raindrops impinging on the ocean surface. On the contrary, this study presents an evidence that the bistatic radar cross section σ0 derived from TechDemoSat‐1 data is reduced due to rain at weak winds, lower than ≈ 6 m/s. The decrease is as large as ≈ 0.7 dB at the wind speed of 3 m/s due to a precipitation of 0–2 mm/hr. The simulations based on the recently published scattering theory provide a plausible explanation for this phenomenon which potentially enables the GNSS‐R technique to detect precipitation over oceans at low winds.en
dc.identifier.eissn1944-8007
dc.identifier.issn0094-8276
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/10643
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-9570
dc.language.isoenen
dc.relation.ispartof10.14279/depositonce-10974en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subject.ddc550 Geowissenschaftende
dc.subject.otherGNSS Reflectometryen
dc.subject.otherrain detectionen
dc.subject.otherrain splashen
dc.subject.otherTDS‐1en
dc.subject.otherocean surfaceen
dc.subject.otherelectromagnetic scatteringen
dc.titleCan GNSS reflectometry detect precipitation over oceans?en
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1029/2018GL079708en
dcterms.bibliographicCitation.issue22en
dcterms.bibliographicCitation.journaltitleGeophysical Research Lettersen
dcterms.bibliographicCitation.originalpublishernameWiley ; American Geophysical Union (AGU)en
dcterms.bibliographicCitation.originalpublisherplaceHoboken, NJen
dcterms.bibliographicCitation.pageend12,592en
dcterms.bibliographicCitation.pagestart12.585en
dcterms.bibliographicCitation.volume45en
tub.accessrights.dnbfreeen
tub.affiliationFak. 6 Planen Bauen Umwelt::Inst. Geodäsie und Geoinformationstechnik::FG GNSS-Fernerkundung, Navigation und Positionierungde
tub.affiliation.facultyFak. 6 Planen Bauen Umweltde
tub.affiliation.groupFG GNSS-Fernerkundung, Navigation und Positionierungde
tub.affiliation.instituteInst. Geodäsie und Geoinformationstechnikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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