Babu K. N. auteur aut IRD Shukla A. K. auteur aut IRD Suchandra A. B. auteur aut IRD Kumar Svva auteur aut IRD Bonnefond P. auteur aut IRD Testut Laurent auteur aut IRD Mehra P. auteur aut IRD Laurain O. auteur aut IRD text journalArticle eng text/pdf born digital access 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. specialized Absolute AltiKa calibration GPS Kavaratti tide gauge INDE OCEAN INDIEN KARAVATTI ILE 032 126 38 1 156-170 2015 0149-0419 https://www.documentation.ird.fr/hor/fdi:010065331 10.1080/01490419.2015.1045639 0149-0419 [F B010065331] https://www.documentation.ird.fr/hor/fdi:010065331 https://www.documentation.ird.fr/intranet/publi/2015/10/010065331.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-11-06 2017-08-23 fdi:010065331 fre