Pass-by-Pass Ambiguity Resolution in Single GPS Receiver PPP Using Observations for Two Sequential Days: An Exploratory Study

“Pass-by-pass” or “track-to-track” ambiguity resolution removes Global Navigation Satellite System (GNSS) satellite hardware delays between adjacent undifferenced (UD) ambiguities, which is often applied in precise orbit determination (POD) for Low Earth Orbit (LEO) satellites to improve the accuracy of orbits. In this study, we carried out an exploratory study use “pass-by-pass” by differencing candidates two passes sidereal days a single Positioning (GPS) receiver static Precise Point (PPP). Using GPS observations from 132 globally distributed reference stations International Service (IGS), find that 99.08% wide-lane (WL) and 97.83% narrow-lane (NL) double-difference ambiguities formed method all can be fixed their nearest integers within absolute fractional residuals 0.2 cycles. These proportions are higher than corresponding values network solution with multiple receivers 97.39% 91.20%, respectively. About 97% 98% finally on average. The comparison estimated station coordinates IGS weekly solutions reveals Root Mean Square (RMS) East North directions 2-4 mm about 6 Up direction. For hourly data, it found mean positioning improvement achieve 10% after resolution. From dam deformation monitoring application, shows fixing rate WL NL closed 100% 90%, time series generated PPP also agreement short baseline solutions.