Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Marine Geodesy 156-170 Absolute AltiKa calibration GPS Kavaratti tide gauge INDE OCEAN INDIEN KARAVATTI ILE 2015 fdi:010065331 ENG Marine Geodesy 0149-0419 ISI:000362123500011 1 10.1080/01490419.2015.1045639 https://www.documentation.ird.fr/hor/fdi:010065331 https://www.documentation.ird.fr/intranet/publi/2015/10/010065331.pdf 38 Horizon (IRD) The Kavaratti calibration-validation site in India at Lakshadweep Sea has been improved to carry out absolute calibration of SARAL/AltiKa altimeter. This site is augmented with a down-looking radar gauge and a permanent GPS receiver. The Kavaratti Island is located near a repeating ground track of SARAL/AltiKa and approximate to 12km away from the point of closest measurement of Jason-2, SARAL/AltiKa crossover point. Additionally, the altimeter and radiometer footprints do not experience any land contamination. This article aims at presenting the initial calibration-validation results over cycles 001-011 of AltiKa. The absolute sea surface height bias has been found to be -48mm at Kavaratti calibration site. In this preliminary study the effect of environmental variables such as winds and pressure are not considered in calculations. 032 ; 126 UR082 / UR065 Inde