Babu K. N., Shukla A. K., Suchandra A. B., Kumar Svva, Bonnefond P., Testut Laurent, Mehra P., Laurain O. (2015). Absolute calibration of SARAL/AltiKa in Kavaratti during its initial calibration-validation phase. Marine Geodesy, 38 (1), p. 156-170. ISSN 0149-0419.
Titre du document
Absolute calibration of SARAL/AltiKa in Kavaratti during its initial calibration-validation phase
Babu K. N., Shukla A. K., Suchandra A. B., Kumar Svva, Bonnefond P., Testut Laurent, Mehra P., Laurain O.
Source
Marine Geodesy, 2015,
38 (1), p. 156-170 ISSN 0149-0419
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.
