Methodology for orbit determination
using DORIS RINEX data

Παπανικολάου, Ξάνθος; Papanikolaou, Xanthos

dc.contributor.author	Παπανικολάου, Ξάνθος
dc.contributor.author	Papanikolaou, Xanthos
dc.date.accessioned	2023-07-03T09:12:26Z
dc.date.available	2023-07-03T09:12:26Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/57868
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.25565
dc.rights	Default License
dc.subject	γεωδαισία	el
dc.subject	δορυφορική γεωδαισία	el
dc.subject	προσδιορισμός τροχιάς	el
dc.subject	αλτιμετρία	el
dc.subject	δορυφορικά δεδομένα	el
dc.subject	orbit determination	en
dc.subject	DORIS	el
dc.subject	satellite geodesy	el
dc.subject	Doppler	el
dc.subject	geodesy	el
dc.title	Methodology for orbit determination using DORIS RINEX data	en
dc.title	Μεθοδολογία επεξεργασίας δεδομένων DORIS RINEX για τον προσδιορισμό δορυφορικών τροχιών	el
dc.contributor.department	Κέντρο Δορυφόρων Διονύσου	el
heal.type	doctoralThesis
heal.classification	Δορυφορική Γεωδαισία	el
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2023-05-17
heal.abstract	Geodesy has greatly advanced since the introduction of artificial, Earth orbiting satellites. A new era has emerged, where satellite-based data dominate the field, providing results for a wide range of geodesy-related fields. The use of artificial satellites in geosciences however requires a comprehensive knowledge of the satellite motion under the influence of all acting forces as well as the description of the satellite trajectory in suitable reference frames. Thus exploitation of satellite-based observations is inherently coupled with the complex problem of orbit determination, a problem that lies in the core of satellite geodesy since its inception. To-date, Precise Orbit Determination (POD) is dominated by three space geodetic techniques, namely Satellite Laser Ranging (SLR), Global Navigation Satellite System (GNSS) and Détermination d’Orbite et Radiopositionnement Intégré par Satellite (Doppler Orbitography and Radiopositioning Integrated by Satellite) (DORIS), which additionally, via the corresponding Technique Centers, provide the input data time series of station positions and Earth Orientation Parameters (EOP) for the realization of the International Terrestrial Reference Frame (ITRF). Despite its prominence and significance in the field of satellite geodesy, DORIS has failed to allure a dedicated scientific audience comparable in size to the other techniques. The shortage of dedicated IDS analysis centers, is indicative of the limited availability of dedicated software solutions designed to handle DORIS data, particularly for the purpose of orbit determination. In the framework of the current Thesis, the scarcity of dedicated DORIS analysis tools for orbit determination is targeted, with the aim of creating a high quality, scientific software solution. Specifically, the software package is non-proprietary and open-source, adaptable and extensible to meet the demands of scientific community, implements state-of-the-art algorithms and methodologies and is designed using modern programming patterns and paradigms. The software is built in a modular fashion. The various components are organized in different, independent, moderate-sized libraries, targeting well defined problems. Various different implementations are put to the test and robust algorithmic approaches are constructed based on criteria of accuracy and efficiency (computing speed and resources). Given the complexity of the problem and the inherent limitations of a thesis, both in terms of time and resources, the objective of the current study is not to attain the highest possible accuracy achievable by the IDS Analysis Centers. Instead, the focus is on developing a brand-new toolset from scratch, which can serve as a foundational component towards achieving that goal. The envisioned toolset, with some additional fine refinements, has the potential to form the backbone of a state-of-the-art, DORIS POD analysis pipeline. Using the toolset developed, an orbit determination analysis scheme was designed and tested using the Joint Altimetry Satellite Oceanography Network (JASON)-3 satellite mission, using a high quality reference orbit for validation. Position differences range within a few meters for one day, while velocity discrepancies are in the order of a few millimeters per second. These results show that the software package developed can serve as a building block for a high quality DORIS analysis software solution. Conclusions and recommendations for further enhancements and refinements are supplied to eventually reach the goal set.	en
heal.advisorName	Τσακίρη, Μαρία
heal.advisorName	Tsakiri, Maria
heal.committeeMemberName	Tsakiri, Maria
heal.committeeMemberName	Paradissis, Demitris
heal.committeeMemberName	Nahmani, Samuel
heal.committeeMemberName	Tsoulis, Dimitris
heal.committeeMemberName	Vergos, George
heal.committeeMemberName	Anastasiou, Dimitris
heal.committeeMemberName	Pollet, Arnaud
heal.academicPublisher	Σχολή Αγρονόμων και Τοπογράφων Μηχανικών	el
heal.academicPublisherID	ntua
heal.numberOfPages	200
heal.fullTextAvailability	false