​This study evaluates the accuracy of 6-hourly gridded Oceansat-3 wind data (from the O3SCAT scatterometer on board) across a broad range of wind speed (WS) conditions, focusing on low to extreme wind speeds. By comparing O3SCAT winds with in-situ buoy measurements and tropical cyclone (TC) observations, a comprehensive validation has been carried out, highlighting the performance of the scatterometer in coastal and open ocean basins. O3SCAT demonstrated higher accuracy in WS and wind direction (WD) with minimal biases compared to coastal and open ocean buoys. The increase in antenna size on O3SCAT was expected to improve retrieval accuracy at low WS. Current analysis of the WS-dependent errors illustrated the root mean square error to be < 2.0 m/s over most of the low WS range (0.5–3.5 m/s).
However, coastal regions with shallow, complex bathymetry exhibited higher errors...
