Sea surface salinity observed from the HY-2A satellite
Journal: Satellite Oceanography and Meteorology (Vol.2, No. 1)Publication Date: 2017-06-30
Authors : Qingtao Song Zhaohui Wang;
Page : 41-48
Keywords : Sea surface salinity; microwave radiometer; HY-2A satellite; SMOS; Aquarius; emissivity model;
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Abstract
Motivated by the shortcomings of radio frequency interferences (RFI) associated with the spaceborne L-band radiometers near the Northwest Pacific and previous study near the Amazon plume, this study presents a
sea surface salinity (SSS) retrieval algorithm from the microwave radiometer onboard the HY-2A satellite. The SSS signal is improved by differentiating the reflectance between the C and X band. A reflectance calibration method is proposed by using a combination of radiative transfer model (RTM) and the Klein-Swift emissivity model. Evaluations of the retrieved SSS from the HY-2A satellite indicate that the root mean square error (RMSE) is about 0.35 psu on 0. 5 degree grid spacing and monthly time scale which is comparable to the accuracy of SMOS and Aquarius-SAC/D satellites.
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