[en] This paper presents high-precision phase altimetric retrievals using the GNSS reflected signals off of sea-ice under grazing angle geometries collected by the Spire Global, Inc. satel-lite constellation. The region and period selected for this study (Hudson Bay and James Bay from January to March 2021) were determined to be the most suitable and steady region as the starting point for the analysis of sea-ice cov-ered areas. The difference between grazing angle GNSS-R retrievals from more than 500 coherent reflection profiles and a reference surface (composed of the DTU mean sea surface and TPXO ocean tide model) has a root-mean-square er-ror (RMSE) of 16.4 cm. This demonstrates that consistently meaningful altimetry retrievals can be achieved under grazing angle GNSS reflectometry (GG-R) geometries using dual-frequency phase measurements collected by nanosatellites in low-Earth orbit over sea-ice covered areas.
Disciplines :
Sciences de la terre & géographie physique Aérospatiale, astronomie & astrophysique Physique, chimie, mathématiques & sciences de la terre: Multidisciplinaire, généralités & autres Ingénierie aérospatiale Ingénierie, informatique & technologie: Multidisciplinaire, généralités & autres
Auteur, co-auteur :
Buendia, Raquel N.; Unilu - University of Luxembourg [LU] > Department of Engineering > Geophysics and Remote Sensing (GRS)
TABIBI, Sajad ; Unilu - University of Luxembourg [LU] > Department of Engineering > Geophysics and Remote Sensing (GRS)
Talpe, Matthieu; Spire Global Luxembourg S.a.r.l., Luxembourg, Luxembourg
Co-auteurs externes :
no
Langue du document :
Anglais
Titre :
Preliminary GNSS-R Altimetry in the Hudson Bay Based on Spire Grazing Angle Measurements
Date de publication/diffusion :
juillet 2022
Nom de la manifestation :
IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium
Lieu de la manifestation :
Kuala Lumpur, Mys
Date de la manifestation :
17-07-2022 => 22-07-2022
Sur invitation :
Oui
Manifestation à portée :
International
Titre du périodique :
IEEE International Geoscience and Remote Sensing Symposium
Peer reviewed :
Peer reviewed
Focus Area :
Computational Sciences Sustainable Development
Objectif de développement durable (ODD) :
13. Mesures relatives à la lutte contre les changements climatiques
The Institute of Electrical and Electronics Engineers Geoscience and Remote Sensing Society (GRSS)
Subventionnement (détails) :
R.N.B. funded by the Luxembourg National Research Fund under the PRIDE programme (PRIDE17/12252781). The Spire data used in this study is part of the Luxembourg Space Agency Data Lake program.
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