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TitreContribution of tide gauges for the determination of w0 in Canada
AuteurHayden, T; Rangelova, E; Sideris, M G; Véronneau, M
SourceGravity, geoid and height systems; par Marti, U (éd.); International Association of Geodesy Symposia vol. 141, 2014 p. 241-248, https://doi.org/10.1007/978-3-319-10837-7 31
Année2014
Séries alt.Secteur des sciences de la Terre, Contribution externe 20150163
ÉditeurSpringer International Publishing
RéunionIAG Symposium GGHS2012; Venice; IT; Octobre 9-12, 2012
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1007/978-3-319-10837-7 31
Mediapapier; en ligne; numérique
Formatspdf
ProvinceCanada; 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
SNRC1; 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-141.0000 -50.0000 90.0000 41.7500
Sujetschamp de la pesanteur; interprétations de la pesanteur; réseau national de données gravimétriques; modèles de la pesanteur; levés gravimétriques; gravité; profils de la pesanteur; cartographie par ordinateur; géomathématique
Résumé(disponible en anglais seulement)
Canada plans to implement a geoid-based and GNSS-accessible vertical datum in 2013 in order to replace the existing Canadian Geodetic Vertical Datum of 1928, which no longer meets the needs of the modern user in terms of accuracy and accessibility. One of the primary concerns when realizing a geoid-based vertical datum is to determine the W0 value that will represent the potential of the zero-height surface. Thus, the objective of this study is to determine W0 by averaging the potential of points on the mean water surface by using Canadian tide gauge records and GOCE-based global geopotential models. The GOCE-based models are extended with the high-resolution gravity field model EGM2008 in order to assess the effect of the omission error on the computation of W0. Similarily, the regional gravimetric geoid model CGG2010 is also used for the estimation of W0 in order to assess the effect of higher frequency contributions of the gravity field, which are missing from the GOCE-based global geopotential models. Additionally, sea surface topography models are utilized in order to validate teh W0 results based on tide gauges and to estimate W0 values for North America. The W0 values obtained using Canadian tide gauges and high resolution gravity field and geoid models are not statistically different from the International Earth Rotation and Reference Systems Service 2010 global conventional value of 62,636,856.00 m2/s2.
GEOSCAN ID296851