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This work assesses the impact of the CYGNSS (full DDM) informed wind fields on storm surge simulations using the constellation&#x0027;s storm observations. In order to assess the impact of the CYGNSS-enhanced wind fields, storm surge simulations are performed with the ADCIRC (ADvanced CIRCulation) model and validation studies are performed with high water mark (HWM) data provided by the US Geological Survey (USGS). To provide context for the CYGNSS-based results, comparisons to storm surge predictions using Modern-Era Retrospective analysis for Research and Applications, Version 2, (MERRA-2) wind fields are also performed using the example of Hurricane Harvey. In this initial assessment, it is observed that augmenting existing wind estimates with information provided by GNSS-R systems like CYGNSS has the potential of improving surge predictions relative to existing sources of wind information.

Impacts of Spaceborne GNSS-R System Observations on Storm Surge Prediction: A Hurricane Harvey Case Study Using CYGNSS Full DDM Downlinks