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External validation of the GRACE GGM01C gravity field using GPS and DORIS positioning results / Pascal Willis in Geophysical research letters, vol 31 n° 13 (July 2004)
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Titre : External validation of the GRACE GGM01C gravity field using GPS and DORIS positioning results Type de document : Article/Communication Auteurs : Pascal Willis , Auteur ; Michael B. Heflin, Auteur
Année de publication : 2004 Article en page(s) : n° L13616 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] données GRACE
[Termes IGN] positionnement par DORIS
[Termes IGN] positionnement par GPSRésumé : (auteur) We have used the new gravity field model GGM01C derived from GRACE data to reanalyze DORIS data from 1993.0 to 2003.2 using the Gipsy/Oasis software and a free-network approach. We have estimated the position and velocity of each DORIS station in ITRF2000. In order to test the accuracy of these results, we have compared them to the positions and velocities of 43 collocated GPS stations using local ties and covariance information. DORIS results computed using the GGM01C gravity field instead of the EGM96 gravity field show a significantly improved external agreement with GPS. Position agreement of 12–26 mm was reduced to 10–13 mm and velocity agreement of 3.3–3.7 mm/yr was reduced to 2.4–3.3 mm/yr. This can be interpreted as an external test of the accuracy of the new GGM01C gravity field. Numéro de notice : A2004-629 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1029/2004GL020038 Date de publication en ligne : 13/07/2004 En ligne : https://doi.org/10.1029/2004GL020038 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102945
in Geophysical research letters > vol 31 n° 13 (July 2004) . - n° L13616[article]