%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Babu, K. N.
%A Shukla, A. K.
%A Suchandra, A. B.
%A Kumar, Svva
%A Bonnefond, P.
%A Testut, Laurent
%A Mehra, P.
%A Laurain, O.
%T Absolute calibration of SARAL/AltiKa in Kavaratti during its initial calibration-validation phase
%D 2015
%L fdi:010065331
%G ENG
%J Marine Geodesy
%@ 0149-0419
%K Absolute ; AltiKa ; calibration ; GPS ; Kavaratti ; tide gauge
%K INDE ; OCEAN INDIEN ; KARAVATTI ILE
%M ISI:000362123500011
%N 1
%P 156-170
%R 10.1080/01490419.2015.1045639
%U https://www.documentation.ird.fr/hor/fdi:010065331
%> https://www.documentation.ird.fr/intranet/publi/2015/10/010065331.pdf
%V 38
%W Horizon (IRD)
%X 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.
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