Use of SARAL/AltiKa over Mountainous Lakes,Intercomparison with Envisat Mission |
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| Authors: | Adalbert Arsen Jean-François Crétaux Rodrigo Abarca del Rio |
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| Affiliation: | 1. Centre national d'études spatiales (CNES), Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Toulouse, Franceadalbert.arsen@legos.obs-mip.fr;3. Centre national d'études spatiales (CNES), Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), Toulouse, France;4. Departamento de Geofisica (DGEO), Universidad de Concepción (UDEC), Concepción, Chile |
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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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| Keywords: | AltiKa altimetry Envisat lakes SARAL |
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