Evaluation of Kinematic GNSS PPP for Tropospheric Zenith Wet Delay Estimation in Mountainous Regions

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dc.contributor.advisorO'Keefe, Kyle
dc.contributor.advisorLachapelle, Gérard
dc.contributor.authorGratton, Paul Thomas
dc.contributor.committeememberO'Keefe, Kyle
dc.contributor.committeememberLachapelle, Gérard
dc.contributor.committeememberBanville, Simon
dc.contributor.committeememberGao, Yang
dc.date2021-11
dc.date.accessioned2021-09-07T15:59:43Z
dc.date.available2021-09-07T15:59:43Z
dc.date.issued2021-08-31
dc.description.abstractIn this research, the effectiveness of kinematic zenith wet delay (ZWD) estimation using global navigation satellite systems (GNSS) precise point positioning (PPP) techniques is evaluated. The major challenges of kinematic ZWD estimation compared to static mode are (1) significant and variable GNSS signal obstruction, (2) trajectory durations of several hours compared to several days in static mode and (3) strong correlation between ZWD and height estimates. High-end and low-cost receivers are tested on vehicular highway trajectories through mountainous regions with height changes over 1000 m and varying levels of GNSS obstruction. Results are compared to static tests with open-sky conditions. Static agreement of ZWD profiles of high-end receivers was found to be at the sub-millimetre level. Agreement of low-cost receivers when using a high-grade antenna was found to be at the level of 3 mm or better. Low-cost receivers using low-cost antennas suffered ZWD biases of 3 cm due to height biases of 7-10 cm. Kinematic accuracy of ZWD profiles for high-end receivers in trajectories with minimal obstruction was found to be 5 mm, increasing to 10 mm in trajectories with more obstruction and 25 mm in very harsh obstructions. Accuracy of ZWD profiles for low-end receivers ranged from 8-20 mm in open conditions and 20-35 mm in more challenging conditions. Low-cost receivers were not tested in very harsh obstructions. Empirical ZWD models were found to agree with high-end receiver PPP-derived ZWD profiles within 15 mm or better, hence accuracy poorer than 15 mm appears ineffective.en_US
dc.identifier.citationGratton, P. T. (2021). Evaluation of Kinematic GNSS PPP for Tropospheric Zenith Wet Delay Estimation in Mountainous Regions (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/39167
dc.identifier.urihttp://hdl.handle.net/1880/113824
dc.language.isoengen_US
dc.publisher.facultySchulich School of Engineeringen_US
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectGNSSen_US
dc.subjectPPPen_US
dc.subjectzenith tropospheric delayen_US
dc.subjectZWDen_US
dc.subject.classificationRemote Sensingen_US
dc.subject.classificationAtmospheric Scienceen_US
dc.subject.classificationEngineering--Electronics and Electricalen_US
dc.titleEvaluation of Kinematic GNSS PPP for Tropospheric Zenith Wet Delay Estimation in Mountainous Regionsen_US
dc.typemaster thesisen_US
thesis.degree.disciplineEngineering – Geomaticsen_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameMaster of Science (MSc)en_US
ucalgary.item.requestcopytrueen_US
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