A Further Evaluation of the Quality Indicator Joss for Ku-Band Wind Scatterometry in Tropical Regions

The quality control (QC) indicator Joss proposed in 2020 represents the spatial wind speed difference between locally inverted wind speed and neighbor wind speeds, which is associated to rain for tropical regions. Joss is effective in rain screening and hence false alarm rate (FAR) reduction. The research is here extended to higher wind speeds and missed detection rate (MDR) in QC acceptance sets, besides, performance of Joss at the edge and nadir parts of the swath are examined. This allows a more complete evaluation of the Joss rain screening features. On-going research is directed towards extension to non-tropical regions where the MDR, as well as FAR, involves different rain features, while the sea ice complicates the QC at higher latitudes.