Estimate of short wave curvature from angular radiometric measurements

The paper presents some results of the experiment CAPMOS´05 performed on an oceanographic research platform in the Black Sea. The platform located 600 m off shore was equipped with a set of contact and remote sensors. Conventional contact sensors were used for direct measurements of atmosphere and sea boundary layer parameters (wind speed and direction, air temperature, water temperature and salinity profiles, etc.) whereas microwave and IR radiometers were used for remote measurements of surface temperature and wave parameters. In particular, microwave Ka-band radiometer measurements were applied for gravity-capillary wave spectrum retrieval using the original techniques based on angular measurements. The spectrum component evolution under unstable wind conditions was investigated. It was demonstrated that the spectral components in the vicinity of the curvature maximum are the most sensitive to the wind velocity variations.