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Marine Geodesy Volume 38, 2015 - Issue sup1: The SARAL/AltiKa Satellite Altimetry Mission
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Original Articles

Use of SARAL/AltiKa over Mountainous Lakes, Intercomparison with Envisat Mission

Adalbert ArsenCentre national d'études spatiales (CNES), Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Toulouse, FranceCorrespondence[email protected]
,
Jean-François CrétauxCentre national d'études spatiales (CNES), Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Toulouse, France
&
Rodrigo Abarca del RioDepartamento de Geofisica (DGEO), Universidad de Concepción (UDEC), Concepción, Chile
Pages 534-548 | Received 15 Jul 2014, Accepted 15 Dec 2014, Published online: 01 Oct 2015
 
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Abstract

The SARAL/AltiKa project is based on a single Ka band altimeter (35.75 GHz), which is the first oceanography altimeter to operate at such a high frequency. Ka band offers reduced radar footprint in comparison to traditional Ku band altimeters and negligible ionospheric effects. In this paper we present and evaluate benefits of AltiKa altimeter applied in the study of lakes in Andean chain in South America. Water levels time series obtained with Envisat/RA-2 and SARAL/AltiKa altimeters over 17 lakes of various sizes are calculated and compared to in situ observations. SARAL/AltiKa measurements tend to be extremely well correlated with in situ measurements and offer significant improvements compared to the Envisat mission.

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