| Title: |
The cooperative IGS RT-GIMs: a reliable estimation of the global ionospheric electron content distribution in real time |
| Authors: |
Liu, Qi; Hernández Pajares, Manuel; Yang, Heng; Monte Moreno, Enrique; Roma Dollase, David; García Rigo, Alberto; Li, Zishen; Wang, Ningbo; Laurichesse, Denis; Zhao, Q.; Wübbena, Gerhard; Krankowski, Andrzej; Ghoddousi Fard, Reza; Blot, Alexis; Zhang, Qiang |
| Contributors: |
Universitat Politècnica de Catalunya. Doctorat en Ciència i Tecnologia Aeroespacials; Universitat Politècnica de Catalunya. Departament de Matemàtiques; Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. IonSAT - Grup de determinació Ionosfèrica i navegació per SAtèl·lit i sistemes Terrestres; Universitat Politècnica de Catalunya. VEU - Grup de Tractament de la Parla |
| Publication Year: |
2021 |
| Collection: |
Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge |
| Subject Terms: |
Àrees temàtiques de la UPC::Aeronàutica i espai; Ionospheric electron density; Atmospheric temperature; Ionosfera; Electrons |
| Description: |
The Real-Time Working Group (RTWG) of the International GNSS Service (IGS) is dedicated to providing high-quality data and high-accuracy products for Global Navigation Satellite System (GNSS) positioning, navigation, timing and Earth observations. As one part of real-time products, the IGS combined Real-Time Global Ionosphere Map (RT-GIM) has been generated by the real-time weighting of the RT-GIMs from IGS real-time ionosphere centers including the Chinese Academy of Sciences (CAS), Centre National d'Etudes Spatiales (CNES), Universitat Politècnica de Catalunya (UPC) and Wuhan University (WHU). The performance of global vertical total electron content (VTEC) representation in all of the RT-GIMs has been assessed by VTEC from Jason-3 altimeter for 3 months over oceans and dSTEC-GPS technique with 2¿d observations over continental regions. According to the Jason-3 VTEC and dSTEC-GPS assessment, the real-time weighting technique is sensitive to the accuracy of RT-GIMs. Compared with the performance of post-processed rapid global ionosphere maps (GIMs) and IGS combined final GIM (igsg) during the testing period, the accuracy of UPC RT-GIM (after the improvement of the interpolation technique) and IGS combined RT-GIM (IRTG) is equivalent to the rapid GIMs and reaches around 2.7 and 3.0 TECU (TEC unit, 1016¿el¿m-2) over oceans and continental regions, respectively. The accuracy of CAS RT-GIM and CNES RT-GIM is slightly worse than the rapid GIMs, while WHU RT-GIM requires a further upgrade to obtain similar performance. In addition, a strong response to the recent geomagnetic storms has been found in the global electron content (GEC) of IGS RT-GIMs (especially UPC RT-GIM and IGS combined RT-GIM). The IGS RT-GIMs turn out to be reliable sources of real-time global VTEC information and have great potential for real-time applications including range error correction for transionospheric radio signals, the monitoring of space weather, and detection of natural hazards on a global scale. All the IGS combined RT-GIMs ... |
| Document Type: |
article in journal/newspaper |
| File Description: |
16 p.; application/pdf |
| Language: |
English |
| Relation: |
info:eu-repo/grantAgreement/EC/H2020/101007599/EU/Plasmasphere Ionosphere Thermosphere Integrated Research Environment and Access services: a Network of Research Facilities/PITHIA-NRF; info:eu-repo/grantAgreement/EC/FP7/100202/EU/Reduced Certification Costs for Trusted Multi-core Platforms/RECOMP; https://essd.copernicus.org/articles/13/4567/2021/; https://hdl.handle.net/2117/363439 |
| DOI: |
10.5194/essd-13-4567-2021 |
| Availability: |
https://hdl.handle.net/2117/363439; https://essd.copernicus.org/articles/13/4567/2021/; https://doi.org/10.5194/essd-13-4567-2021 |
| Rights: |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ ; Open Access ; Attribution-NonCommercial-NoDerivs 3.0 Spain |
| Accession Number: |
edsbas.1CDBE8BB |
| Database: |
BASE |