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TEC reconstruction using dual frequency modernized GPS (L1/L5) and GALILEO (E1/E5A) measurements
Warnant, René; Lonchay, Matthieu; Spits, Justine et al.
2010International Beacon Satellite Symposium 2010
Editorial reviewed
 

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Keywords :
TEC; L5; Galileo; GPS
Abstract :
[en] GPS dual frequency L1/L2 measurements have been used for many years to reconstruct the ionosphere Total Electron Content and to detect small-scale irregular structures in the ionospheric plasma. TEC is usually computed by forming the geometry-free combination of L1/L2 phase measurements. Most of the existing techniques use the geometry-free combination of code measurements to solve the non-integer geometry-free ambiguity. This methodology requires the computation of satellite and receiver hardware biases. In addition, the quality of the ambiguity resolution process strongly depends on code multipath. New signals from Galileo and from modernized GPS offer new opportunities for TEC reconstruction. First attempts to compute TEC using triple frequency measurements from modernized GPS (L1/L2/L5) and from Galileo (E1, E5a, E5b) give very promising results but, at the present time, only a few triple frequency GPS/Galileo receivers are available. The University of Liege has purchased two Septentrio PolaRx3G receivers which allow tracking GPS L1/L5 and Galileo E1/E5a signals. These receivers have been installed at the Geophysical Observatory of Dourbes (50.1°N, 4.6° E) and are continuously tracking all GPS and Galileo satellites in view (including GPS SVN49/PRN01, Giove A and Giove B) since November 2009. The paper analyzes the added value of L1/L5 and E1/E5a geometry free combinations and of the new GPS and Galileo signals for TEC reconstruction. It discusses the influence of multipath and of SVN49/PRN1, Giove A and Giove B hardware biases.
Disciplines :
Earth sciences & physical geography
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Space science, astronomy & astrophysics
Author, co-author :
Warnant, René  ;  Université de Liège - ULiège > Département de géographie > Unité de Géomatique - Géodésie et GNSS
Lonchay, Matthieu ;  Université de Liège - ULiège > Département de géographie > Unité de Géomatique - Géodésie et GNSS
Spits, Justine
Bidaine, Benoît
Stankov, Stanimir;  Institut Royal Météorologique - IRM
Wautelet, Gilles  ;  Université de Liège - ULiège > Département de géographie > Unité de Géomatique - Topographie et géométrologie
Language :
English
Title :
TEC reconstruction using dual frequency modernized GPS (L1/L5) and GALILEO (E1/E5A) measurements
Publication date :
June 2010
Event name :
International Beacon Satellite Symposium 2010
Event place :
Barcelona, Spain
Event date :
7-11 June 2010
Audience :
International
Peer reviewed :
Editorial reviewed
Available on ORBi :
since 07 January 2015

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