Time Transfer Algorithm Using Multi-GNSS PPP with Ambiguity Resolution |
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| Institution: | 1. Department of Astronomy, University of Science and Technology of China, Hefei 230026;2. Polar Research Institute of China, Shanghai 200136;3. Center for Astrophysics, Guangzhou University, Guangzhou 510006;4. Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216;1. School of Mathematics and Computer Sciences, Yunnan Minzu University, Kunming 650500;2. School of Economics and Business Administration, Yunnan Vocational and Technical Collage of Agriculture, Kunming 650031;3. School of Physics and Electronic Engineering, Guangzhou University, Guangzhou,510006;4. Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011;1. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033;2. Department of Astronomy, University of Science and Technology of China, Hefei 230026;3. George P. and Cynthia Woods Mitchell Institute for Fundamental Physics & Astronomy, Texas A. & M. University, Department of Physics and Astronomy, Texas TX 77843;4. Chinese Center for Antarctic Astronomy, Nanjing 210033;5. Physics Department and Qinghua Center for Astrophysics, Qinghua University, Beijing 100084;6. The Observatories of the Carnegie Institution for Science, California CA 91101;7. Department of Astrophysics, University of New South Wales, New South Wales NSW 2052;1. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033;2. Key Laboratory of Radio Astronomy, ChineseAcademy of Sciences, Nanjing 210033 |
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| Abstract: | With the development of real-time service (RTS) project, timing users can apply the real-time precise point positioning (PPP) technique for time transfer. As a participant in the RTS project, the Centre National d’Etudes Spatiales (CNES) implements the PPPWIZARD (Precise point positioning with Integer and Zero-difference Ambiguity Resolution Demonstrator) project to validate the PPP with ambiguity resolution. In order to analyze the contribution of multiple global navigation satellite system (multi-GNSS) and real-time ambiguity resolution to time transfer, our experiment used the observation from multi-GNSS, including GPS (Global Positioning System), GLONASS (GLObal NAvigation Satellite System), BDS (BeiDou navigation System), and Galileo for data processing. Meanwhile, the real-time products from CNES were utilized to examine the performance of four different PPP processing modes. The experimental results indicated that, of all the processing modes, the time transfer using multi-GNSS PPP with GPS ambiguity resolution had the smallest standard deviations (STDs). The STD value was decreased by 38.1, compared with the traditional time transfer results using GPS PPP. |
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| Keywords: | Astrometry Time transfer methods: data analysis |
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