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.
Keyword :
Sea surface salinity, microwave radiometer, HY-2A satellite, SMOS, Aquarius, emissivity model