| Title | Considerations on mapping the GNSS ionospheric phase irregularities over Canada using kriging |
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| Author | Ghoddousi-Fard, R; Prikryl, P; Weygand, J M |
| Source | American Geophysical Union Fall Meeting 2020, poster sessions; 2020, 1 sheet  Open Access |
| Links | Online - En ligne
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| Image |  |
| Year | 2020 |
| Alt Series | Natural Resources Canada, Contribution Series 20190353 |
| Publisher | American Geophysical Union |
| Meeting | American Geophysical Union Fall Meeting 2020; December 1-17, 2020 |
| Document | Web site |
| Lang. | English |
| Media | on-line; digital |
| File format | html |
| Province | Canada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut;
Canada |
| NTS | 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 |
| Area | Canada; United States of America; Greenland; Denmark |
| Lat/Long WENS | -150.0000 -30.0000 86.0000 40.0000 |
| Subjects | geophysics; Science and Technology; Nature and Environment; Health and Safety; satellite geodesy; ionosphere; ionospheric currents; geomagnetism; geomagnetic fields; geomagnetic variations; solar
variations; geostatistics; statistical analyses; mapping techniques; geophysical surveys; magnetic surveys, ground; magnetometer surveying; global navigation satellite systems (GNSS); Global positioning systems; Geographic data; Time |
| Illustrations | photographs; location maps; geoscientific sketch maps; time series; tables |
| Program | Canadian Geodetic Survey Geodetic Analysis and Development - Space-based technology |
| Released | 2020 12 01 |
| Abstract | 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. |
| Summary | (Plain Language Summary, not published)
Irregularities in the ionosphere over Canadian high latitudes can affect radio communications and satellite navigation. This presentation studies a
technique to map ionospheric irregularities using GNSS observations to assist space weather studies and PNT applications. |
| GEOSCAN ID | 321478 |
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