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TitleConsiderations on mapping the GNSS ionospheric phase irregularities over Canada using kriging
AuthorGhoddousi-Fard, R; Prikryl, P; Weygand, J M
SourceAmerican Geophysical Union Fall Meeting 2020, poster sessions; 2020, 1 sheet Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesNatural Resources Canada, Contribution Series 20190353
PublisherAmerican Geophysical Union
MeetingAmerican Geophysical Union Fall Meeting 2020; December 1-17, 2020
DocumentWeb site
Mediaon-line; digital
File formathtml
ProvinceCanada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut; Canada
NTS1; 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
AreaCanada; United States of America; Greenland; Denmark
Lat/Long WENS-150.0000 -30.0000 86.0000 40.0000
Subjectsgeophysics; 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
Illustrationsphotographs; location maps; geoscientific sketch maps; time series; tables
ProgramCanadian Geodetic Survey Geodetic Analysis and Development - Space-based technology
Released2020 12 01
AbstractIonospheric 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.

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