Abstract
An ocean wind retrival method with microwave radiometer data is proposed taking into accout relative wind directions on observed brightness temperature. The proposed method is based on the geophysical models which was proposed by Frank Wentz and the wind speed retrieval algorithm utilizing a modified simulated anneiling. Validity and usefullness of the proposed method is confirmed with Advanced Microwave Scanning Radiometer (AMSR-E) data and the corresponding NCEP Global Data Assimilation System (GDAS) data. Through a comparison of the wind speed derived from AMSR-E and GDAS, it is found systematic difference which depends on Relative Wind Direction (RWD). Observed brightness temperature from AMSR-E data is modified as to remove the systematic difference which results in improvement of the ocean wind speed retrieval accuracy by up to 61.2% which depends on location and seasons in concern. In the worst case, ocean speed estimation accuracy was degraded by 0.94% though.
