BDS-3/GPS/Galileo OSB Estimation and PPP-AR Positioning Analysis of Different Positioning Models
نویسندگان
چکیده
With the completion of BeiDou Global Navigation Satellite System (BDS-3), multi-system precise point positioning ambiguity resolution (PPP-AR) has been realized. The satellite phase fractional cycle bias (FCB) is a key to PPP-AR. Compared combined ionosphere-free (IF) model, undifferenced and uncombined (UDUC) model retains all information from observations can be easily extended arbitrary frequencies. However, FCB difficult apply directly UDUC model. An observable-specific signal (OSB) interact with original observations, providing complete flexibility for PPP-AR multi-frequency multi-GNSS. In this study, OSB product generation GPS (G), Galileo (E), BDS-3 (C) systems performed using 117 globally distributed multi-GNSS experiment (MGEX) stations, their performances are evaluated. Then, comparison analysis two models IF conducted. results show that stability products three better than 0.05 ns. For (PPP) fixed solution, comparable accuracy convergence time both Wuhan University (WUM) Centre National d’Etudes Spatials (CNES) institutions, an average fixed-ambiguity rate over 90%. PPP float most significant improvement in E-direction. improvements under static kinematic modes higher 45% 40%, respectively. times improved on by 48% 60% mode 40% 55% mode, Among models, former slightly latter solution. have after GCE combination superior other system combinations. solution 8.5 min, 16.4 min.
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2022
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs14174207