GLONASS-R: GNSS reflectometry with an FDMA based satellite navigation system
Journal article, 2014

The information from reflected Global Navigation Satellite System (GNSS) signals can become a valuable data source, from which geophysical properties can be deduced. This approach, called GNSS Reflectometry (GNSS-R), can be used to develop instruments that act like an altimeter when arrival times of direct and reflected signals are compared. Current GNSS-R systems usually entirely rely on signals from the Global Positioning Service (GPS), and field experiments could demonstrate that information from such systems can measure sea level with an accuracy of a few centimeters. However, the usage of the Russian GLONASS system has the potential to simplify the processing scheme and to allow handling of direct and reflected signals like a bistatic radar. Thus, such a system has been developed and deployed for test purposes at the Onsala Space Observatory, Sweden, that has an operational GPS-based GNSS-R system. Over a period of 2 weeks in October 2013, GPS-based GNSS-R sea level monitoring and measurements with the newly developed GLONASS-R system were carried out in parallel. In addition, data from colocated tide gauge measurements were available for comparison. It can be shown that precision and accuracy of the GLONASS-based GNSS-R system is comparable to, or even better than, conventional GPS-based GNSS-R solutions. Moreover, the simplicity of the newly developed GLONASS-R system allows to make it a cheap and valuable tool for various remote sensing applications.



Software-defined radio



Thomas Hobiger

Japan National Institute of Information and Communications Technology

Rüdiger Haas

Chalmers, Earth and Space Sciences, Space Geodesy and Geodynamics

Johan Löfgren

Chalmers, Earth and Space Sciences, Space Geodesy and Geodynamics

Radio Science

0048-6604 (ISSN) 1944799x (eISSN)

Vol. 49 4 271-282

Driving Forces

Sustainable development


Basic sciences


Onsala Space Observatory

Subject Categories

Earth and Related Environmental Sciences

Oceanography, Hydrology, Water Resources



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