基于GPS的海拔测量,以帮助表征土地污染在沿海地区.pdfVIP

Available online at Advances in Space Research 51 (2013) 1383–1399 /locate/asr GPS-based sea level measurements to help the characterization of land contamination in coastal areas P. Bonnefond a,⇑, P. Exertier a, O. Laurain a, P. Thibaut b, F. Mercier c a ˆ Geoazur – Observatoire de la Cote d’Azur, Avenue Nicolas Copernic, 06130 Grasse, France b ` Collecte Localisation Satellites, 8-10, rue Hermes, Parc Technologique du Canal, 31520 Ramonville Saint-Agne, France c CNES, 18, avenue Edouard Belin, 31401 Toulouse Cedex 9, France Available online 14 July 2012 Abstract The Corsica site has been established in 1996 to perform altimeter calibration on TOPEX/Poseidon and then on its successors Jason-1 and Jason-2. The first chosen location was under the #85 ground track that overflight the Senetosa Cape. In 2005, it was decided to develop another location close to Ajaccio, to be able to perform the calibration of Envisat and in a next future of SARAL/AltiKa that will flight over the same ground tracks. Equipped with various instruments (tide gauges, permanent GPS, GPS buoy, weather station. . .) the Corsica calibration site is able to quantify the altimeter Sea Surface Height bias but also to give an input on the origin of this bias (range, corrections, orbits, . . .). Due to the size of Corsica (not a tiny island), the altimeter measurement system (range and corrections) can be contam