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TitleEnabling ambiguity resolution in CSRS-PPP
 
AuthorBanville, SORCID logo; Hassen, E; Lamothe, P; Farinaccio, J; Donahue, B; Mireault, Y; Goudarzi, M A; Collins, P; Ghoddousi-Fard, R; Kamali, OORCID logo
SourceNavigation, Journal of the Institute of Navigation vol. 68, issue 2, 2021 p. 433-451, https://doi.org/10.1002/navi.423
Image
Year2021
Alt SeriesNatural Resources Canada, Contribution Series 20200582
PublisherWiley
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf; html
ProvinceCanada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut
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
Lat/Long WENS-141.0000 -50.0000 90.0000 41.7500
Subjectsgeophysics; Science and Technology; satellite geodesy; navigation satellites; geodetic networks; Canadian Spatial Reference System (CSRS); Services; Products; Data processing; global navigation satellite systems (GNSS); Geographic data
Illustrationstables; time series; location maps; plots; bar graphs; photographs
ProgramCanadian Geodetic Survey Active Control System
Released2021 05 21
AbstractPrecise point positioning (PPP) uses precise satellite orbits, clock corrections and biases derived from a global network of reference stations to enable accurate positioning worldwide. Natural Resources Canada's Canadian Spatial Reference System (CSRS) PPP is a free Web service offering automated PPP processing. A critical factor limiting the adoption of PPP in many applications is the convergence time needed to reach centimeter-level accuracies. To address this issue, CSRS-PPP now implements PPP with ambiguity resolution (PPP-AR). This feature required the development of new algorithms, such as sequential normal stacking for least-squares filtering/smoothing, and the weighted integer decision concept for ambiguity validation. New satellite product lines (ultra-rapid, rapid, final) also have been deployed to enable PPP-AR processing with various latencies. This analysis demonstrates that sub-centimeter horizontal accuracies can be obtained in less than one hour for both static and kinematic modes. Using product lines with longer latencies is beneficial, although improvements are typically within the reported uncertainties.
Summary(Plain Language Summary, not published)
The Canadian Geodetic Survey of NRCan provides tools and services for accurate access to the Canadian Spatial Reference System (CSRS). This access can be achieved, for instance, using global navigation satellite systems (GNSS). For improved accuracy, augmentation data in the form of precise satellite orbit and clock products, among others, is typically provided to GNSS users. This positioning methodology is often referred to as precise point positioning (PPP). This article describes NRCan's CSRS-PPP service version 3 and, more specifically, the algorithms supporting the underlying software.
GEOSCAN ID327832

 
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