Abstract
Standard and newly re-tracked altimeter data of the Topex/Poseidon and Envisat missions are analysed in the Mediterranean Sea in the proximity of selected coastlines.
Over-conservative selection criteria in standard level 2 products cause rejection of many data in coastal regions. Among the standard criteria, most critical for the data rejection are the checks on microwave radiometer wet tropospheric correction and on standard deviation of the 18 Hz ranges. Using a model tropospheric correction, Envisat performs better than Topex and is approaching the coast up to 5 km at sea-land transitions.
A further improvement in quality of coastal data is obtained using off-line retracked Topex-RGDR and Envisat data, these latter ones retracked with the β-5 and Improved Threshold empirical methods.
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Fenoglio-Marc, L., Fehlau, M., Ferri, L., Becker, M., Gao, Y., Vignudelli, S. (2010). Coastal Sea Surface Heights from Improved Altimeter Data in the Mediterranean Sea. In: Mertikas, S. (eds) Gravity, Geoid and Earth Observation. International Association of Geodesy Symposia, vol 135. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-10634-7_33
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DOI: https://doi.org/10.1007/978-3-642-10634-7_33
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