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Atmosphere and Ocean Monitoring using GNSS reflected signals: Current Status and Prospects at GFZ

Asgarimehr, Milad and Arnold, Caroline and Govedarica, Nikolina and Hoseini, Mostafa and Semmling, Maximilian and Stiehler, Felix and Weigel, Tobias and Wickert, Jens (2020) Atmosphere and Ocean Monitoring using GNSS reflected signals: Current Status and Prospects at GFZ. Frontiers of Geodetic Science, 13.-15. Okt. 2020, Berlin, Germany.

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Abstract

Deployment of reflected signals of Global Navigation Satellite System (GNSS) from the Earth's surface, so-called GNSS-Reflectometry (GNSS-R), has emerged as a powerful tool in obtaining a variety of geophysical parameters and surface properties. This technique can meet the growing demand for high spatiotemporal resolution geophysical data and close the data gaps due to its advantageous characteristics: it is a multistatic radar method using heretofore existing signals from numerous GNSS satellites as the transmitters. The low-costs, low-mass, and low-power recievers can be implemented in the ground-based stations or different air/space-borne platforms, such as Cyclone GNSS (CYGNSS), a constellation of eight small Low Earth Orbiting (LEO), launched in December 2016. Here, we present the derived GNSS-R surface wind speeds, validations, and comparisons to conventional remote sensing instruments. The robustness of the derived wind speeds during rain events over oceans is demonstrated being a piece of evidence for the suitability of the technique for severe weather monitoring. Using modern data scientific techniques, further accuracy of the wind speed data is sought. In different experiments on the implementation of Artificial Intelligence techniques, it is shown how such methods could lead to a higher quality of GNSS-R data products. Potentials are still being explored and new ideas are being created leading to novel GNSS-R applications. It is shown that the technique can detect precipitation over oceans. In addition to empirical evidence, physical feasibility and schemes are discussed. Besides, it is shown how the technique can also respond to ocean mesoscale eddies initiating future studies on this application.

Item URL in elib:https://elib.dlr.de/140097/
Document Type:Conference or Workshop Item (Speech)
Title:Atmosphere and Ocean Monitoring using GNSS reflected signals: Current Status and Prospects at GFZ
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Asgarimehr, Miladmilad.asgarimehr (at) gfz-potsdam.deUNSPECIFIED
Arnold, CarolineDeutsches Klimarechenzentrum, Hamburg, GermanyUNSPECIFIED
Govedarica, NikolinaTechnische Universität Berlin, Berlin, GermanyUNSPECIFIED
Hoseini, MostafaNorwegian University of Science and Technology NTNU, Trondheim, NorwayUNSPECIFIED
Semmling, MaximilianMaximilian.Semmling (at) dlr.dehttps://orcid.org/0000-0002-5228-8072
Stiehler, FelixDeutsches Klimarechenzentrum, Hamburg, GermanyUNSPECIFIED
Weigel, TobiasDeutsches Klimarechenzentrum, Hamburg, GermanyUNSPECIFIED
Wickert, JensGeoForschungsZentrum Potsdamhttps://orcid.org/0000-0002-7379-5276
Date:October 2020
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:GNSS reflectometry, atmosphere
Event Title:Frontiers of Geodetic Science
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:13.-15. Okt. 2020
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Ionosphäre (old)
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Space Weather Observation
Deposited By: Semmling, Dr. Maximilian
Deposited On:25 Jan 2021 10:50
Last Modified:25 Jan 2021 10:50

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