دورية أكاديمية
Evaluation of Real-Time PPP-Based Tide Measurement Using IGS Real-Time Service
| العنوان: | Evaluation of Real-Time PPP-Based Tide Measurement Using IGS Real-Time Service |
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| المؤلفون: | Mingwei Di, Anmin Zhang, Bofeng Guo, Jiali Zhang, Rongxia Liu, Mengyuan Li |
| المصدر: | Sensors, Vol 20, Iss 10, p 2968 (2020) |
| بيانات النشر: | MDPI AG, 2020. |
| سنة النشر: | 2020 |
| المجموعة: | LCC:Chemical technology |
| مصطلحات موضوعية: | GPS, real-time, tide measurement, precise point positioning, robust Vondrak filter, Chemical technology, TP1-1185 |
| الوصف: | Tide data plays a key role in many marine scientific research fields such as seafloor topography measurement and navigation safety. To obtain reliable tide data, various methods have been proposed, e.g., tide station measurement, satellite altimeter measurement, and differential global positioning system (GPS) buoy measurement. However, these methods suffer from the limitation that continuous observations at different areas might not be always available. In order to provide high-precision as well as continuous real-time tide data, we propose a method based on real-time precise point positioning (RT-PPP) by using International GNSS Service (IGS) real-time service (RTS) products. Firstly, compared with the IGS final products, the accuracy of the RTS satellite orbit and clock is evaluated. Secondly, the positioning performance of RT-PPP is compared with the IGS ultra-fast products. Finally, a robust Vondrak filter is proposed to eliminate the influence of high-frequency noise and errors and to obtain tide results. Experimental results show that three-dimensional (3D) accuracy of the RTS orbit is better than 0.05 m, and also has 0.22 ns less clock bias. An improvement of 60% is achieved for positioning accuracy using RTS products compared to IGS ultra-fast products. Compared with the post-processing PPP method, the double difference (DD) method and tide gauge data, the root mean square (RMS) values of RT-PPP tide are 0.090, 0.194 and 0.167 m, respectively. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 20102968 1424-8220 |
| Relation: | https://www.mdpi.com/1424-8220/20/10/2968; https://doaj.org/toc/1424-8220 |
| DOI: | 10.3390/s20102968 |
| URL الوصول: | https://doaj.org/article/9f78d98ab469483b8624a4dd8641ed5e |
| رقم الأكسشن: | edsdoj.9f78d98ab469483b8624a4dd8641ed5e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20102968 14248220 |
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| DOI: | 10.3390/s20102968 |