We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
SNR-Based GNSS-R for Coastal Sea-Level Altimetry.
- Authors
Tabibi, Sajad; Sauveur, Renaldo; Guerrier, Kelly; Metayer, Gerard; Francis, Olivier
- Abstract
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.
- Subjects
PORT-au-Prince (Haiti); SEA level; GLOBAL Positioning System; ALTIMETRY
- Publication
Geosciences (2076-3263), 2021, Vol 11, Issue 9, p391
- ISSN
2076-3263
- Publication type
Article
- DOI
10.3390/geosciences11090391