Coastal Sea Surface Heights from Improved Altimeter Data in the Mediterranean Sea - Details

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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.　©　Springer-Verlag　Berlin　Heidelberg　2010.

Keyword：

Aneroid altimeters Geodetic satellites Meteorological instruments Microwave devices Observatories Surface waters Troposphere

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[ 1 ] [Fenoglio-Marc, L.]Institute of Physical Geodesy, Technische Universität Darmstadt, Darmstadt, Germany
[ 2 ] [Fehlau, M.]Institute of Physical Geodesy, Technische Universität Darmstadt, Darmstadt, Germany
[ 3 ] [Ferri, L.]Institute of Physical Geodesy, Technische Universität Darmstadt, Darmstadt, Germany
[ 4 ] [Becker, M.]Institute of Physical Geodesy, Darmstadt University of Technology (IPGD), Darmstadt, Germany
[ 5 ] [Gao, Y.]College of Environmental and Resources, Fuzhou University, Fuzhou, Fujian, China
[ 6 ] [Vignudelli, S.]College of Environmental and Resources, Fuzhou University, Genova, Italy