Σύγκριση Μεθόδων Διπλών Διαφορών (ΔΔ) και Precise Point Positioning (PPP) Στην Επεξεργασία Μετρήσεων GPS

Μπίρης, Θωμάς; Biris, Thomas

dc.contributor.author	Μπίρης, Θωμάς	el
dc.contributor.author	Biris, Thomas	en
dc.date.accessioned	2015-01-26T08:36:23Z
dc.date.available	2015-01-26T08:36:23Z
dc.date.issued	2015-01-26
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/40128
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.5913
dc.rights	Αναφορά Δημιουργού 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/gr/	*
dc.subject	Satellite Geodesy, GPS, PPP, Precise Point Positioning, Double Differences	en
dc.subject	Δορυφορική Γεωδαισία, Επεξεργασία Μετρήσεων GPS, Μέθοδος Διπλών Διαφορών, Μέθοδος Απόλυτου Προσδιορισμού PPP, Σαντορίνη	el
dc.title	Σύγκριση Μεθόδων Διπλών Διαφορών (ΔΔ) και Precise Point Positioning (PPP) Στην Επεξεργασία Μετρήσεων GPS	el
heal.type	bachelorThesis
heal.generalDescription	Η παρούσα μελέτη εξετάζει τις διαφορές ανάμεσα στην μέθοδο των Διπλών Διαφορών και στην μέθοδο Απόλυτου Προσδιορισμού PPP. Η περιοχή μελέτης είναι η Σαντορίνη όπου υπάρχει μόνιμο δίκτυο παρακολούθησης λόγω των γεωλογικών ιδιομορφιών που παρουσιάζει. Οι επιλύσεις γίνονται με το επιστημονικό λογισμικό Bernese, και προκύπτουν συντεταγμένες και χρονοσειρές θέσεις σε τοποκεντρικό τρισδιάστατο σύστημα αναφοράς. Στην συνέχεια τα αποτελέσματα συγκρίνονται και προκύπτου τα τελικά συμπεράσματα.	el
heal.classification	Ανώτερη και Δορυφορική Γεωδαισία	el
heal.language	el
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2014-10-15
heal.abstract	The current thesis regards the comparison between two methods of GPS data analysis. The first one is the traditional double difference method and the second one is the precise point positioning (PPP). The PPP method entails advantages, such as being less time consuming and less infrastructure demanding compared to the double difference method, but its accuracy and reliability has yet to be proven. The place of study is Santorini. Santorini was chosen due to the plethora of available data and because of its great geological interest. The time of study is 22 months, starting from June 2011 and ending in March 2013. The frequency of data resolution is one day per month, usually in the middle of the month. The network is the permanent GPS network of Santorini, consisted of 9 stations. Data was extracted from either public websites, where it is available for the science community, or from the NTUA Laboratory of Higher and Satellite Geodesy. Also worth noting, is that high accuracy data from IGS was also used for the PPP method. Finally several stations outside of Santorini were used, seven in number, and as equally spread as possible around Santorini. The software used for the analysis is Bernese v5.0. The reference frame is ITRF2008 for the double difference method and IGS08 for the PPP method, later named IGB08. The Matlab software was also used for mathematical transformations and time-lines creation. The main text involves further analysis of the used networks and data, and the the methodologies that the GPS data resolutions were based on. Also differences between the two methods and their advantages and drawbacks are mentioned. The stages of resolution on the Bernese software are investigated, along with the problems that were encountered, and the results and time-lines are listed. At the end of the thesis, several conclusions concerning the analysis, as well as suggestion for future work on this subject are seen.	el
heal.advisorName	Παραδείσης, Δημήτρης	el
heal.committeeMemberName	Γκίκας, Βασίλης	el
heal.committeeMemberName	Μήλας, Παρασκευάς	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Αγρονόμων και Τοπογράφων Μηχανικών. Τομέας Τοπογραφίας. Εργαστήριο Ανώτερης Γεωδαισίας.	el
heal.academicPublisherID	ntua
heal.numberOfPages	118 σ.
heal.fullTextAvailability	true