IMOS - Satellite Remote Sensing - Surface Waves Sub-Facility - Gridded SAR wind - Delayed mode data

Sentinel-1 A, B and C satellites are part of Europe's Copernicus Earth Observation program and carry identical C-band Synthetic Aperture Radar (SAR) instruments. This dataset contains regularly gridded (0.01 x 0.01 deg) daily 10m neutral stability wind speed and direction derived from Sentinel-1 SARs in the wider Australian nearshore regions. In these regions, the satellites normally operate in interferometric wide (IW) swath mode. The winds are derived using a consistent geophysical model function (gmf), CMOD5N, and variational Bayesian inversion approach as proposed in Portabella et al. (2002) and Sentinel-1 Ocean wind (owi) algorithm definition document. The input SAR and model (ECMWF) data used in the inversion are sourced from owi Level-2 product, and the resulting derived winds are approximately at 1km horizontal spatial resolution as in the source product. Wind speeds are also calibrated against Metop-A and B scatterometer wind database of Ribal and Young, 2020 (JTECH). For each day, all available derived wind field swaths (available as separate wind product: IMOS - Satellite Remote Sensing - Surface Waves Sub-Facility - SAR wind - Delayed mode data) are combined and interpolated to a nominal 0.01 x 0.01-degree regular grid. The final data are thus arranged in a rectilinear grid with dimensions defined by TIME, LATITUDE and LONGITUDE.The data represented by this record, are presented in delayed mode.