The wet tropospheric path delay is presently the main source of error in the estimation of the mean sea level. This correction on altimetric measurements highly depends on the atmospheric water vapor content. Nowadays, water vapor products from microwave radiometers are relatively close but important discrepancies remain. Understanding those differences can help us to improve water products and reduce at the same time the error on the mean sea level. This poster shows our first results on the comparison of water vapor products from three radiometers: Advanced Microwave Scanning Radiometer for EOS (AMSR-E), JASON Microwave Radiometer (JMR) and Micro- Wave Radiometer (MWR). The purpose of this study is to characterize both temporally and spatially the behavior of the discrepancies.
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