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GLONASS-R: GNSS reflectometry with an FDMA based satellite navigation system

Thomas Hobiger ; Rüdiger Haas (Institutionen för rymd- och geovetenskap, Rymdgeodesi och geodynamik) ; Johan Löfgren (Institutionen för rymd- och geovetenskap, Rymdgeodesi och geodynamik)
Radio Science (0048-6604). Vol. 49 (2014), 4, p. 271-282.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: GNSS-R, GLONASS, Software-defined radio, Reflectometry



Denna post skapades 2014-03-24. Senast ändrad 2016-05-24.
CPL Pubid: 195533

 

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Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Rymdgeodesi och geodynamik (2010-2017)

Ämnesområden

Hållbar utveckling
Geovetenskap och miljövetenskap
Oceanografi, hydrologi, vattenresurser

Chalmers infrastruktur

Onsala rymdobservatorium