Three geometry-based algorithms, namely measurement subset testing, consecutive exclusion and iterative change of measurement weights are investigated to address multipath scenarios with multiple simultaneously affected measurements.Dach Urs Hugentobler Technische Universitt Mnchen Pierre Fridez Universitt Bern Michael Meindl Request full-text PDF To read the full-text of this research, you can request a copy directly from the authors.Request full-text Download citation Copy link Link copied Request full-text Download citation Copy link Link copied To read the full-text of this research, you can request a copy directly from the authors.
Citations (454) Abstract The version 5.0 of Bernese GPS Software is no longer supported. Bernese Gnss Software Software And ThePlease look for the current version of this software and the manual at. Bernese Gnss Software Code And PhaseThe PPP technique is based on the evaluation of the code and phase measurements collected from a single receiver. In this technique, the receiver position is directly determined by using precise orbits and clock corrections issued by IGS and similar organizations 5, 6. The success of the positioning with the PPP technique depends largely on the determination of precise orbit changes of GPS satellites... GPS); dT is the satellite clock offset which is the difference between satellite time (satellite clock) and system time (GPS); c is the speed of light in space; N is the integer ambiguity of the ionosphere-independent carrier phase; T r is the tropospheric signal delay, and I r is the ionospheric signal delay between the satellite and the receiver; is the wavelength; p and are the noise components including the signal reflection 5, 6. ![]() Evaluation of GNSS Data with Internet Based Services: The Case of HRUH Station Chapter Full-text available Jan 2019 Mustafa Ulukavak View. The scientific software packages Bernese (Dach et al. GIPSYOASIS II (Lichten et al. Webb and Zumberge 1997) and GAMIT (King and Bock 2005) are frequently used to obtain highly accurate coordinates for GNSS data processing. Because of its availability, the Bernese GPS software v5.0 (Dach et al. GPS observations for this study... GPS observations for this study. The 6-day average for the local coordinates from the three control BMs (P101, P102 and P103), calculated using the Bernese software RP approach based on IGS stations, were accepted as true (reference) results.. Performance Analysis of Web-Based Relative and Precise Point Positioning Techniques with Different Satellite Visibility Conditions Article Full-text available Mar 2020 Mge Albayrak Bahattin Erdogan Halil Erkaya The Global Navigation Satellite System (GNSS) is used for precise positioning applications, such as surveying and geodesy. The aim of the present work is to evaluate the effectiveness of web-based relative positioning (RP) and precise point positioning (PPP) GNSS post-processing services using measurements of different satellite visibility obstacles. Within this framework, static GNSS observations were conducted at three control benchmarks selected taking the impact of natural and human-made obstacles on satellite signals into consideration. GNSS observations in Istanbul, Turkey were repeatedly obtained from three control BMs over six days and were evaluated through two RP (AUSPOS, OPUS) and three PPP (CSRS-PPP, Magic-PPP, GAPS-PPP) web-based GNSS post-processing services. The 6-day average of the three control benchmark coordinates computed using the Bernese GPS software v5.0, and were accepted as true results. They were compared to the local coordinates acquired through the RP and PPP web-based GNSS post-processing services. The different satellite visibility conditions were found to have significant effects on the GNSS point positioning solutions. We also found that web-based GNSS post-processing services provide easy and effective solutions for geodetic positioning applications. This requires defining a relationship between the metric outputs and degradation in measurement precision and sometimes tuning model parameters 15. Besides the elevation angle of satellites 16, Signal-to-Noise Ratio (SNR) and equivalently CN 0 are well-known quality metrics investigated for the purpose of GNSS stochastic models and measurement weighting schemes. References 171819 investigate the relationship between measurement precision and corresponding CN 0 to develop the SIGMA- and SIGMA- stochastic models to cope with signal attenuation, diffraction and NLOS conditions... In this section, the CMC-based multipath error correction, CN 0 -based stochastic weighting and detection of affected measurements are discussed in details. While the two first approaches have been previously investigated in the literature 89101112131415 16 1718192021222324, the focus will be on detection techniques where a new Geometric-Free (GF)-based multipath detection is presented. Following a comprehensive review of each approach, the paper focuses on detectionexclusion and detectionde-weighting techniques where several single and dual-frequency monitoring metrics are employed in a combination with time-averaging and the M of N detection strategy.
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