Article (Scientific journals)
SNR-Based GNSS-R for Coastal Sea-Level Altimetry
TABIBI, Sajad; SAUVEUR, Renaldo; Guerrier, Kelly et al.
2021In Geosciences, 11 (9 391)
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Abstract :
[en] Geodetic Global Navigation Satellite System reflectometry (GNSS-R) uses ground-based signals of opportunity to retrieve sea levels at an intermediate spatial scale. Geodetic GNSS-R is based on the simultaneous reception of Line-of-Sight (LoS) and its coherent GNSS sea surface reflection (non-LOS) signals. The scope of this paper is to present geodetic GNSS-R applied to sea level altimetry. Signal-to-Noise Ratio (SNR) measurements from a Commercial Off-The-Shelf (COTS) geodetic-quality GNSS station at the Haiti Coast Guard Base in Port-au-Prince is used to retrieve sea levels in the International Terrestrial Reference Frame 2014 (ITRF2014). The GNSS-R sea levels are compared with those of the OTT Radar Level Sensor (RLS) installed vertically below the GNSS antenna. The Root-Mean-Square Error (RMSE) between the geodetic GNSS-R sea levels and OTT RLS records is 3.43 cm, with a correlation of 0.96. In addition, the complex differences between the OTT RLS records and 15-min GNSS-R sea levels using Global Positioning System (GPS) and Globalnaya Navigazionnaya Sputnikovaya Sistema (or Global Navigation Satellite System; GLONASS) signals for all the eight major tidal constituents are in mm-level agreement. Therefore, geodetic GNSS-R can be used as a complementary approach to the conventional method for sea level studies in a stable terrestrial reference frame.
Disciplines :
Earth sciences & physical geography
Author, co-author :
TABIBI, Sajad  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
SAUVEUR, Renaldo ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
Guerrier, Kelly
Metayer, Gerard
FRANCIS, Olivier  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
External co-authors :
yes
Language :
English
Title :
SNR-Based GNSS-R for Coastal Sea-Level Altimetry
Publication date :
2021
Journal title :
Geosciences
ISSN :
2076-3263
Publisher :
MDPI Open Access Publishing, Basel, Switzerland
Volume :
11
Issue :
9 391
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 17 September 2021

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