Evaluation of Smartphone-Based GNSS Positioning Using Ionosphere Free-Precise Point Positioning in Static Mode | ||
| Aswan University Journal of Sciences and Technology | ||
| Volume 5, Issue 1, March 2025, Pages 93-103 PDF (1.19 M) | ||
| Document Type: Original papers | ||
| DOI: 10.21608/aujst.2025.342512.1152 | ||
| Authors | ||
| Hussain Ahmed Kamal* 1; Mohamed Abdelazeem2; Amgad Abazeed3; Amr Mohamed Wahaballa1 | ||
| 1Civil Engineering Department, Faculty of engineering, Aswan University, Egypt | ||
| 2Civil Engineering Department, Faculty of engineering, Aswan University, Egypt. Civil Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Saudi Arabia | ||
| 3Construction and Building Engineering Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport, Aswan, Egypt | ||
| Abstract | ||
| Global Navigation Satellite System (GNSS) positioning with smartphones has increased attention due to its accessibility and potential for high-precision applications. In this study, the accuracy of the multi-constellation multi-frequency Xiaomi 11T module for static applications is investigated. Two-hour static GPS and Galileo measurements are acquired using Xiaomi 11T centered on a reference point at the Arab Academy for Science, Technology, and Maritime Transport in Aswan, Egypt, over a period of three separate days; subsequently, the measurements are processed using the Ionosphere Free-Precise Point Positioning (IF-PPP) processing model. Three processing scenarios are applied including GPS-only, Galileo-only, and combined GPS/Galileo. To account for satellite and clock errors, the final Center for Orbit Determination in Europe (CODE) products are utilized. The results indicate that decimeter- and submeter-level accuracies can be fulfilled in horizontal and vertical directions, respectively; additionally, the combined constellation positioning accuracy are superior to those obtained from single constellation solutions, which is about 50-centimeter and 80-centimeter position accuracies in horizontal and vertical directions, respectively. Moreover, it is found that GPS-only solution is slightly better than Galileo-only solution, while Galileo-only solutions demonstrate slightly better performance in the vertical directions. | ||
| Keywords | ||
| Xiaomi 11T; Ionosphere-Free PPP; GPS; Galileo; CODE | ||
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