| Titre | The cooperative IGS RT-GIMs: a reliable estimation of the global ionospheric electron content distribution in real time |
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| Auteur | Liu, Q; Hernández-Pajares, M; Yang, H; Monte-Moreno, E; Roma-Dollase, D; García-Rigo, A; Li, Z; Wang, N; Laurichesse, D; Blot, A; Zhao, Q; Zhang, Q; Hauschild, A; Agrotis, L; Schmitz, M; Wübbena, G;
Stürze, A; Krankowski, A; Schaer, S; Feltens, J; Komjathy, A; Ghoddousi-Fard, R |
| Source | Earth System Science Data vol. 13, issue 9, 2021 p. 4567-4582, https://doi.org/10.5194/essd-13-4567-2021  Accès ouvert |
| Image |  |
| Année | 2021 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20210259 |
| Éditeur | Copernicus Publications |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.5194/essd-13-4567-2021 |
| Media | numérique; en ligne |
| Formats | pdf; html |
| Province | Canada; Colombie-Britannique; Alberta; Saskatchewan; Manitoba; Ontario; Québec; Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Yukon;
Nunavut; Canada |
| SNRC | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Région | Monde |
| Lat/Long OENS | -180.0000 180.0000 90.0000 -90.0000 |
| Sujets | géodésie par satellite; satellites de navigation; ionosphère; courants ionosphériques; techniques de cartographie; Données géographiques; Système de positionnement global; Traitement des données;
géophysique; Sciences et technologie; Nature et environnement |
| Illustrations | tableaux; cartes de localisation; organigrammes; séries chronologiques |
| Programme | Levés géodésiques du Canada Analyse et développement géodésiques - Technologies spatiales |
| Diffusé | 2021 09 23 |
| Résumé | (disponible en anglais seulement)
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, 10000000000000000 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 generated and analyzed during the testing period are available at
https://doi.org/10.5281/zenodo.5042622 (Liu et al., 2021b). |
| Sommaire | (Résumé en langage clair et simple, non publié)
Cet article rend compte du travail coopératif d'un groupe de travail du Service GNSS international pour la génération de cartes mondiales en
temps réel de l'ionosphère. Cela vise à servir des applications en temps réel, y compris la correction d'erreur de distance pour les signaux radio trans-ionosphériques, la surveillance de la météo spatiale et la détection des risques naturels à
l'échelle mondiale. |
| GEOSCAN ID | 328957 |
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