Altimetry with GNSS-R interferometry: first proof of concept experiment

The Global Navigation Satellite System Reflectometry (GNSS-R) concept was conceived as a means to densify radar altimeter measurements of the sea surface. Until now, the GNSS-R concept relied on open access to GNSS transmitted codes. Recently, it has been proposed that the ranging capability of the...

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Bibliographic Details
Published in:GPS solutions 2012-04, Vol.16 (2), p.231-241
Main Authors: Rius, Antonio, Nogués-Correig, Oleguer, Ribó, Serni, Cardellach, Estel, Oliveras, Santi, Valencia, Enric, Park, Hyuk, Tarongí, José Miguel, Camps, Adriano, van der Marel, Hans, van Bree, Roel, Altena, Bas, Martín-Neira, Manuel
Format: Article
Language:English
Subjects:
Altimeters
Altimetry
Artificial satellites in navigation
Atmospheric Sciences
Automotive Engineering
Bandwidths
Bistatic radars
Earth and Environmental Science
Earth Sciences
Electrical Engineering
Enginyeria de la telecomunicació
Experiments
Geophysics/Geodesy
Global navigation satellite system
Global Positioning System
Global positioning systems
GNSS reflectometry
GPS
High gain
Interferometry
Microprocessors
Ocean altimetry
Open access
Original Article
Radar
Radio altimeters
Radiocomunicació i exploració electromagnètica
Radionavegació
Reflectometry
Satèl·lits artificials en navegació
Signal processing
Sistema de posicionament global
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Subsystems
Superhigh frequencies
Teledetecció
Àrees temàtiques de la UPC
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Summary:The Global Navigation Satellite System Reflectometry (GNSS-R) concept was conceived as a means to densify radar altimeter measurements of the sea surface. Until now, the GNSS-R concept relied on open access to GNSS transmitted codes. Recently, it has been proposed that the ranging capability of the technique for ocean altimetric applications can be improved by using all the signals transmitted in the bandwidth allocated to GNSS, which includes open access as well as encrypted signals. The main objective of this study is to provide experimental proof of this enhancement through a 2-day experiment on the Zeeland Bridge (The Netherlands). In the experiment, we used a custom built GNSS-R system, composed of high gain GPS antennas, calibration subsystem, and an FPGA-based signal processor which implemented the new concepts, an X-band radar altimeter and a local geodetic network. The results obtained indicate that the new approach produces a significant improvement in GNSS-R altimetric performance.
ISSN:1080-5370
1521-1886
DOI:10.1007/s10291-011-0225-9