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Using GPS to detect vertical movement along a leveling line in Imperial valley, California / W. Parks in Surveying and land information systems, vol 61 n° 3 (01/09/2001)

Public [article]  inSurveying and land information systems > vol 61 n° 3 (01/09/2001) . - pp 177 - 191 Titre : Using GPS to detect vertical movement along a leveling line in Imperial valley, California Type de document : Article/Communication Auteurs : W. Parks, Auteur Année de publication : 2001 Article en page(s) : pp 177 - 191 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] Californie (Etats-Unis) [Termes IGN] déformation verticale de la croute terrestre [Termes IGN] détection de changement [Termes IGN] hauteur ellipsoïdale [Termes IGN] nivellement par GPS Résumé : (Auteur) A GPS survey designed to precisely estimate ellipsoidal height was conducted in 1997 on benchmarks of a precise leveling line in Imperial Valley, California, a line actively leveled to monitor ground subsidence related to geothermal fluid withdrawal. The survey duplicated a 1995 survey. Data were analyzed to estimate differences in ellipsoidal height between adjacent benchmarks. GPSderived height differences for 1997 were compared to 1995 differences. Discrepancies were analyzed to identify leveling sections in which vertical movement might have occurred. Three such sections were identified. Numéro de notice : A2001-166 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21861 [article]

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