مؤتمر
VTEC Estimation Performance of Real-Time PPP with Galileo High Accuracy Service
| العنوان: | VTEC Estimation Performance of Real-Time PPP with Galileo High Accuracy Service |
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| المؤلفون: | Gül, Caneren, Warnant, René |
| المصدر: | European Geoscience Union 2024, Vienna, Austria [AT], 14 - 19 April 2024 |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | GNSS, Precise Point Positioning, Ionosphere, Real-Time, Total Electron Content, Galileo, High Accuracy Service, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique |
| الوصف: | Precise positioning with Global Navigation Satellite Systems (GNSS) requires a significant amount of effort for deliberate modeling of various effects on transmitted signals. Among these error sources, the ionosphere has a special place with its daily variations of total electron content (TEC), disrupting signals and degrading positioning performance. Some attempts to remove ionospheric effects, such as forming ionosphere-free combinations in Precise Point Positioning (PPP) can cause the amplification of observation noise. Using data-driven Global Ionospheric Maps (GIM) from GNSS analysis centers could be an alternative solution. However, precise GIMs are available after 10-11 days from the observation campaign and are not accessible in real-time. Therefore, the demand for real-time and reliable solutions is a hotspot research field in precise positioning.Real-time PPP (RT-PPP) with undifferenced and uncombined observables can convert the limitations of the ionosphere into an opportunity to make GNSS a versatile tool that is capable of monitoring the ionosphere and achieving high-accuracy positioning in real time. Our work focuses on the performance of ionospheric delay estimation with RT-PPP, using a newly developed real-time correction service, Galileo High Accuracy Service (Galileo HAS). First, International GNSS Service (IGS) stations from low, mid, and high latitudes for day-of-year 140,141, and 143 were selected for RT-PPP data processing. Next, we performed station-based Vertical TEC (VTEC) modeling and compared the results with GIM from the Centre for Orbit Determination in Europe (CODE). In addition, we processed the data from two receivers co-located on the rooftop of the University of Liège Sart Tilman campus B5a building. Finally, characteristics of the between-receiver single difference of estimated ionospheric delays are presented to assess the precision of slant ionospheric delays. |
| نوع الوثيقة: | conference paper not in proceedings http://purl.org/coar/resource_type/c_18cp conferencePaper peer reviewed |
| اللغة: | English |
| DOI: | 10.5194/egusphere-egu24-8485 |
| URL الوصول: | https://orbi.uliege.be/handle/2268/316473 |
| حقوق: | open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
| رقم الأكسشن: | edsorb.316473 |
| قاعدة البيانات: | ORBi |
| DOI: | 10.5194/egusphere-egu24-8485 |
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