| 英文摘要 |
In recent years, Precise Point Positioning (PPP) has been widely used in GNSS static and dynamic positioning. This technique utilizes high-precision satellite orbits and clock error products to achieve cm-level positioning. PPP eliminates the need for a ground control station in differential positioning and provides the ITRF-based coordinates through the use of a GNSS receiver. PPP employs a non-differential observation model, retaining parameters such as receiver clock error, tropospheric, and ionospheric delays. This facilitates its applications in atmospheric and geodynamic science, including the water vapor retrieval, ionospheric monitoring, and low-orbit satellite orbit determination. With the development of GNSS and PPP related technologies, investing in establishing online PPP services has become a future trend. The service allows users to upload satellite observation data through web pages, perform automatic calculations and notify users of the results via email. This online positioning service greatly reduces the user's operation time. From a government perspective, providing online positioning services can ensure the consistency of satellite observation calculations and positioning result coordinate systems and compliance with standardized procedures. This study developed the automated PPP solutions based on the Bernese and RTKLIB positioning software, and used satellite observation data collected in different operating environments to verify the accuracy of positioning results. In general, it can provide positioning accuracy of less than 5 cm in the plane direction and less than 10 cm in the elevation direction. This system is currently open for testing and will be modified based on user’s feedback. The website is https://ppponline.ntpu.edu.tw/. |
本站僅提供期刊文獻檢索。
