| Titre | Considerations on mapping the GNSS ionospheric phase irregularities over Canada using kriging |
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| Auteur | Ghoddousi-Fard, R; Prikryl, P; Weygand, J M |
| Source | American Geophysical Union Fall Meeting 2020, poster sessions; 2020, 1 feuille  Accès ouvert |
| Liens | Online - En ligne
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| Image |  |
| Année | 2020 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20190353 |
| Éditeur | American Geophysical Union |
| Réunion | American Geophysical Union Fall Meeting 2020; décembre 1-17, 2020 |
| Document | site Web |
| Lang. | anglais |
| Media | en ligne; numérique |
| Formats | 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 |
| Lat/Long OENS | -150.0000 -30.0000 86.0000 40.0000 |
| Sujets | géodésie par satellite; ionosphère; courants ionosphériques; géomagnétisme; champs géomagnétiques; variations géomagnétiques; variations solaires; géostatistiques; analyses statistiques; techniques de
cartographie; levés géophysiques; levés magnétiques, sol; prospection magnétométrique; Système de positionnement global; Données géographiques; Temps; géophysique; Sciences et technologie; Nature et environnement; Santé et sécurité |
| Illustrations | photographies; cartes de localisation; cartes géolscientiques généralisées; séries chronologiques; tableaux |
| Programme | Levés géodésiques du Canada Analyse et développement géodésiques - Technologies spatiales |
| Diffusé | 2020 12 01 |
| Résumé | (disponible en anglais seulement)
Ionospheric irregularities over Canada, which are mostly driven by the coupling processes between the solar wind and Earth's magnetic field, frequently result
in phase scintillations over auroral oval and polar cap regions. Mapping of such irregularities can serve space weather nowcasting as well as positioning, navigation and timing (PNT) applications that are vulnerable to strong phase
scintillation.
Kriging as one of the popular geo-statistical interpolation techniques relies on suitable spatial covariance functions or variograms. Variograms are used for deriving weights in ordinary kriging estimator. Kriging has been used in
total electron content (TEC) interpolation for PNT applications, interpolation of scintillation intensity over equatorial regions, and to evaluate covariance functions of TEC variations over Canada.
In this paper, we examine kriging approach to
map ionospheric phase irregularities over Canada using dual frequency phase rate variations from 1Hz GNSS observations. When combining different receiver types and constellations for mapping ionospheric phase irregularities over a region, receiver
and constellation specific background phase noise deteriorate the precondition of stationarity of the phase irregularity indices, which is required for deriving variograms. Furthermore, reliability of experimental variograms, can be affected by
several factors such as sample size, selected interval, trend, and anisotropy. GNSS phase irregularity maps are examined under different variogram estimation scenarios and corresponding results are evaluated using selected validation locations
excluded from mapping experiments. In addition, the irregularity maps are investigated in the context of equivalent ionospheric currents derived from ground magnetometer network using the spherical elementary current system method. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Les irrégularités ionosphériques au-dessus des hautes latitudes canadiennes peuvent affecter les radiocommunications et la navigation par
satellites. Cette présentation étudie une technique pour modéliser les irrégularités ionosphériques en utilisant les observations GNSS pour aider les études de météo spatiales et les applications PNT. |
| GEOSCAN ID | 321478 |
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