|Institution:||Delft University of Technology|
|Keywords:||GNSS; PPP; PPP-RTK; GPS; Galileo; BeiDou; Convergence time|
|Full text PDF:||http://resolver.tudelft.nl/uuid:99efdca7-72ed-4943-ba16-42d960bf490e|
Many different Global Navigation Satellite Systems (GNSS) are currently in orbit or are being deployed. Research on positioning techniques using these satellites is ongoing. The Curtin GNSS Research Centre has developed a software tool for further testing of these techniques. This thesis represents the testing done on the Curtin PPP-RTK User Platform. To test the response to unexpected situations large numbers of datasets with observation data from receivers worldwide are processed. The performance of the user platform is assessed on the achieved precision and accuracy. Additionally the time to reach a precise solution, using the different techniques is an important factor. Precise point positioning (PPP) is first tested using only data from GPS, as the largest number of datasets are available for this constellation. The next step is testing PPP using the newer constellations: The Chinese BeiDou, European Galileo and Japanese QZSS. The improvement from these, not yet completed, constellations is investigated. The second tested positioning method is Integer Ambiguity Resolution enabled Precise Point Positioning (PPP-RTK). This requires additional information from a second receiver, or a network of receivers. The performance improvement by ambiguity resolution for GPS data is shown first. The performance of PPP-RTK using all constellations is complicated by the lack of satellites during parts of the day. For segments of the day where sufficient satellites are available the improvement, specifically for the convergence time can be clearly shown. Advisors/Committee Members: Teunissen, P.J.G., Verhagen, A.A., Lindenbergh, R.C..