Investigation sur le potentiel du système GPS pour l'auscultation topographique de barrages
|Authors:||Akrour, Boussaad; Santerre, Rock|
|Abstract:||This paper presents an investigation on the potential of the Global Positioning System (GPS) for dam deformation monitoring. It summarizes a study on the effects of obstructions, caused by the dam structure itself, on GPS baseline determination as well as on the impact of tropospheric delay on GPS height. Field test results carried out on baselines observed by GPS with one of their ends partly obstructed by a vertical wall, showed discrepancies of about 6 mm, for an adequate pre-selected satellite configuration. The results are worse with a less favorable satellite configuration. The processing of 12 baselines with height components varying between 2 m and 115 m, has also been carried out with 5 tropospheric models and 12 options. This study demonstrates that the differential Essen and Froome model gives the best performances. This model could be quite suitable for dam deformation monitoring|
|Document Type:||Article de recherche|
|Issue Date:||1 December 1998|
|Open Access Date:||Restricted access|
|This document was published in:||Geomatica, Vol. 52 (4), 441-445 (1998)|
Canadian Institute of Geomatics.
|Collection:||Articles publiés dans des revues avec comité de lecture|
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