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 ∼12 km 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 −48 mm 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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Document Type: Research Article
Space Applications Centre (ISRO), Ahmedabad, India
Observatoire de La Côte d'Azur – Géoazur, Grasse, France
Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS) UMR5566 (CNES/CNRS/IRD/UPS), Toulouse, France
National Institute of Oceanography, Goa, India
Publication date: September 10, 2015
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