Application of GNSS Precise Point Positioning to Low-Cost Hardware for cm-level Positioning

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dc.contributor.advisorBisnath, Sunil B.
dc.contributor.authorBasnet, Pragati
dc.date.accessioned2025-04-10T10:51:21Z
dc.date.available2025-04-10T10:51:21Z
dc.date.copyright2024-12-05
dc.date.issued2025-04-10
dc.date.updated2025-04-10T10:51:20Z
dc.degree.disciplineEarth & Space Science
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractPrecise Point Positioning (PPP) offers high-precision GNSS positioning solutions. The advent of low-cost hardware provides an affordable alternative to costly geodetic-grade hardware, broadening the accessibility of high-precision positioning across many applications. However, this hardware produces measurements with higher noise levels, reduced multipath suppression, and lower carrier-to-noise density ratios (C/N0), restricting its ability to achieve cm-level accuracy. This study addresses these limitations by developing a novel C/N0-based empirical observation weighting model to accompany the signal characteristics of low-cost hardware. This model enhances positioning accuracy by emphasizing high-quality signals above a nominal C/N0 threshold and down-weighting observations below it. The proposed model reduces float to carrier-phase integer ambiguity resolution (fixed) convergence time by 71% for 5 cm and 38% for 2.5 cm horizontal error thresholds for the static dataset tested, demonstrating the potential of low-cost GNSS devices as viable, high-precision positioning solutions.
dc.identifier.urihttps://hdl.handle.net/10315/42823
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subject.keywordsGNSS
dc.subject.keywordsPPP
dc.subject.keywordsPPP-AR
dc.subject.keywordsPrecise point positioning
dc.subject.keywordsAmbiguity resolution
dc.subject.keywordsStochastic modelling
dc.subject.keywordsObservation weighting
dc.subject.keywordsLow-cost GNSS hardware
dc.subject.keywordsLow-cost high-precision positioning
dc.subject.keywordsNovel observation weighting
dc.subject.keywordscm-level positioning
dc.titleApplication of GNSS Precise Point Positioning to Low-Cost Hardware for cm-level Positioning
dc.typeElectronic Thesis or Dissertation

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