ORBi: Wautelet Gilles - Influence of geometry in the case of relative positioning with GNSS

Reference : Influence of geometry in the case of relative positioning with GNSS


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/33587

Title :	Influence of geometry in the case of relative positioning with GNSS
Language :	English
Alternative title :	[fr] Influence de la géométrie de la constellation dans le cas du positionnement relatif par GNSS
Author, co-author :	Wautelet, Gilles [Université de Liège - ULg > > > Doct. sc. (géographie - Bologne)]
	Lejeune, Sandrine [> >]
	Lonchay, Matthieu [Université de Liège - ULg > Département de géographie > Géodésie et positionnement par satellite >]
	Warnant, René [Université de Liège - ULg > Département de géographie > Géodésie et positionnement par satellite >]
Publication date :	18-Nov-2009
On invitation :	No
Audience :	International
Event name :	Sixth European Space Weather Week
Event date :	du 16 novembre 2009 au 20 novembre 2009
Event organizer :	European Spatial Agency (ESA)
Event place (city) :	Bruges
Event country :	Belgium
Keywords :	[en] GNSS ; Ionosphere ; Positioning ; Satellite geometry
Abstract :	[en] Relative positioning with GNSS is generally used to achieve precise positions in the frame of critical applications (surveying, photo-control...). On this basis, we have developed a software which allows to compute a positioning error due to the ionosphere only using reference stations belonging to the Belgian Dense Network (BDN). This network consists in 66 GPS (dual-frequency) receivers over the whole Belgium. The drawback of this method is that this computation needs the design matrix which contains coefficients depending on satellite constellation geometry. Therefore, like for absolute positioning, a poor geometry (evaluated by the Dilution of Precision, or DOP) can also lead to large positioning error that cannot be separated from the one due to ionospheric effects, and in particular the small-scale structures. The main goal of this paper is to build a similar index to DOP for relative positioning in our software to be able to separate the ionospheric effects from the geometric ones. The final step is to study the feasability of a service for users of relative positioning using the BDN. The objective is to give in post-processing the positioning accuracy degradation for all BDN baselines and to associate a colour scheme to the different degradation classes created.
Funders :	European Spatial Agency (ESA)
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/33587

File(s) associated to this reference

Fulltext file(s):

	File	Commentary	Version	Size	Access
Open access	Poster-ESWW6.pdf	No commentary	Publisher postprint	760.71 kB	View/Open

Additional material(s):

	File	Commentary	Version	Size	Access
Open access	Abstract_ESWW6.pdf	No commentary	-	50.44 kB	View/Open

All documents in ORBi are protected by a user license.

Dspace v1.5