Open Journal Systems

Sea surface salinity observed from the HY-2A satellite

Qingtao Song, Zhaohui Wang

Article ID: 250
Vol 2, Issue 1, 2017, Article identifier:41-48

VIEWS - 1893 (Abstract) 620 (PDF)


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.


Sea surface salinity; microwave radiometer; HY-2A satellite; SMOS; Aquarius; emissivity model

Full Text:


Included Database


Huang X, Zhu J, Lin et al. (2014). Preliminary assessment of sea surface wind speed production of HY-2 scanning microwave radiometer. Acta Oceanologica Sinica, 33(1): 114–119.

Klein L and Swift C T. (1977). An improved model for the dielectric constant of sea water at microwave frequencies. Antennas and Propagation, IEEE Transactions on, 25(1): 104–111.

Lagerloef G, Colomb F R, Vine D L et al. (2008). The Aquarius/Sac-D mission: Designed to meet the salinity remote-sensing challenge. Oceanography, 21(1): 68–81.

Reul N, Tenerelli J, Boutin J et al. (2012). Overview of the first SMOS sea surface salinity products. Part I: Quality assessment for the second half of 2010. IEEE Transactions on Geoscience and Remote Sensing, 50(5): 1636–1647.

Reul N, Saux-Picart S, Chapron B et al. (2009), Demonstration of ocean surface salinity microwave measurements from space using AMSR-E data over the Amazon plume. Geophysical Research Letters, 36(13): 88–97

Stogryn A. (1971). Equations for calculating the dielectric constant of saline water (Correspondence). IEEE Trans-actions on Microwave Theory & Techniques, 19(8): 733–736.

Weyl P K (1964). On the change in electrical conductance of seawater with temperature. Limnology & Oceanography, 9(1): 75–78.

Yin X B, Boutin J, Dinnat E et al. (2016). Roughness and foam signature on SMOS-MIRAS brightness temperatures: A semi-theoretical approach. Remote Sensing of Environment, 180: 221–233.

(1893 Abstract Views, 620 PDF Downloads)


  • There are currently no refbacks.

Copyright (c) 2017 Satellite Oceanography and Meteorology