Poster (Scientific congresses, symposiums and conference proceedings)
Impact of Limited Multi-GNSS Visibility on Vertical Land Movement Estimates
Abraha, Kibrom Ebuy; Teferle, Felix Norman; Hunegnaw, Addisu et al.
201526th General Assembly of the International Union of Geodesy and Geophysics (IUGG)
 

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Keywords :
multi-GNSS; signal obstructions; vertical land movements
Abstract :
[en] The number of GNSS satellites and their geometry directly affect the quality of positioning and derived satellite products. Accordingly, the International GNSS Service (IGS) recommends GNSS antennas to be installed away from natural and man-made surfaces and structures, which may affect the incoming signals through severe multipath or obstructions. Following these recommendations, continuous GNSS (cGNSS) stations are generally located in low multipath environments with minimal signal obstructions. However, some applications require GNSS antennas to be installed at specific locations in order to measure local processes. Hence, in support of sea level studies, cGNSS stations must be installed close to or at tide gauges in order to accurately monitor the local vertical land movements experienced by the sea level sensors. However, the environment at the tide gauge might not be optimal for GNSS observations due to the aforementioned station-specific effects, which degrade the quality of coordinate solutions.This first study investigates the impact of severe signal obstructions on long-term monitoring results by use of simulated and real observations for selected cGNSS stations, and evaluates if the use of multi-GNSS (GPS+GLONASS) constellations will benefit derived results. To investigate these effects, we implemented azimuth and elevation dependent masking in the Bernese GNSS Software version 5.2. We present our preliminary results on the impact of different obstruction scenarios and combined GPS and GLONASS solutions on coordinate and vertical land movement estimates.
Research center :
Geophysics Laboratory, University of Luxembourg
ULHPC - University of Luxembourg: High Performance Computing
Disciplines :
Earth sciences & physical geography
Author, co-author :
Abraha, Kibrom Ebuy ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Teferle, Felix Norman ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Hunegnaw, Addisu  ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Dach, Rolf;  Astronomical Institute, University of Bern
External co-authors :
yes
Language :
English
Title :
Impact of Limited Multi-GNSS Visibility on Vertical Land Movement Estimates
Publication date :
27 June 2015
Event name :
26th General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Event place :
Prague, Czechia
Event date :
June 22 - July 2, 2015
Audience :
International
Funders :
FNR - Fonds National de la Recherche [LU]
Available on ORBilu :
since 20 June 2015

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