Weighting of code double-differences by means of Snr

dc.contributor.author	Γιαννίου, Μιχαήλ	el
dc.contributor.author	Groten, Erwin	en
dc.date.accessioned	2015-01-30T19:15:40Z
dc.date.available	2015-01-30T19:15:40Z
dc.date.issued	2015-01-30
dc.identifier.uri	http://hdl.handle.net/11400/5181
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.subject	Global Positioning System
dc.subject	Agronomy
dc.subject	Παγκόσμιο σύστημα εντοπισμού θέσης
dc.subject	Αγρονομία
dc.title	Weighting of code double-differences by means of Snr	en
heal.type	journalArticle
heal.secondaryTitle	theory and validation tests	en
heal.classification	Topography
heal.classification	Geodesy
heal.classification	Τοπογραφία
heal.classification	Γεωδαισία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85053969
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85053969
heal.classificationURI	N/A-Τοπογραφία
heal.classificationURI	N/A-Γεωδαισία
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh86003934
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85053969
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh91006254
heal.contributorName	Αστεριάδης, Γεώργιος	el
heal.contributorName	Μπαντέλας, Άνθιμος	el
heal.contributorName	Κονταδάκης, Μ. Ε.	el
heal.contributorName	Κατσάμπαλος, Κωνσταντίνος	el
heal.contributorName	Παπαδημητρίου, Α.	el
heal.contributorName	Tζιαβός, H.N.	el
heal.language	en
heal.access	campus
heal.recordProvider	Τ.Ε.Ι. Αθήνας, Σχολή Τεχνολογικών Εφαρμογών, Τμήμα Μηχανικών Πληροφορικής και Μηχανικών Τοπογραφίας & Γεωπληροφορικής	el
heal.publicationDate	1997
heal.bibliographicCitation	Gianniou, M. and Groten, E. (1997). weighting of code double-differences by means of Snr: theory and validation tests. The Earth and the Universe, Volume dedicated to Professor Lyssimachos Mavridis on the occasion of his completing forty-five years of academic activities, Aristotle University of Thessaloniki, Thessaloniki: Ziti Editions 1997, pp 413-422. Available from: http://users.teiath.gr/mgianniou/index_files/Groten_Gianniou_1997_AUTH.pdf	en
heal.abstract	The improvement of the technology of the GPS-receivers within the last years led to sub-meter precision of the code measurements. This allowed a code-based differential kinematic positioning with accuracy of a few meters, which is sufficient for a variety of applications. However, for special applications, like the CAT III precision approach and landing of an aircraft, there is a need to enhance the accuracy of code- Differential GPS (DGPS). The paper describes a method, that improves the code-DGPS solution. The method is based on a realistic computation of the covariance matrix of the observations which is used in the least-squares adjustment. The proposed algorithm uses for the computation of the weighting matrix the signal-to-noise ratio (SNR) given by the receiver. In the first part of the paper the theoritical background of the ordinary and proposed weighting is given. In the second part a summary of extensive validation tests comparing the results of the two processing methods is given.	en
heal.journalName	The Earth and the Universe	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true