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Discussion of sun-synchronous orbits for SWOT

Tides/High Frequency Aliases Splinter Summary. Discussion of sun-synchronous orbits for SWOT strong arguments against sun-synchronous orbit (not useful for tides, corruption of climate signals by diurnal errors, corruption of mean absolute dynamic topography, corruption of the seasonal cycle)

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Discussion of sun-synchronous orbits for SWOT

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  1. Tides/High Frequency Aliases Splinter Summary • Discussion of sun-synchronous orbits for SWOT • strong arguments against sun-synchronous orbit (not useful for tides, corruption of climate signals by diurnal errors, corruption of mean absolute dynamic topography, corruption of the seasonal cycle) • no strong arguments for sun-synchronous orbit other than engineering and cost issues • Slight upgrade in FES2004 to correct some problems with S1 and K2 • Contributions of shallow water tidal analyses needed for new validation data set from R. Ray, especially from Australia • Improvements in high frequency or dynamic atmospheric correction from a much higher resolution MOG2D version • In current AVISO products, S1 solution is not optimal and some technical issues related to the filtering of the pressure forcing need to be addressed

  2. Use of baroclinic models and data assimilation methods may provide further improvements for dynamic atmospheric correction • Update on surface atmospheric pressure errors provided from comparisons of surface atmospheric pressure analyses and data (important for uncertainty in dry tropospheric, IB and dynamic atmospheric corrections)

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