Multi-parameter ocean surface wind speed retrieval based on least square method

Analyzing and fitting the HY-2 satellite data by least square method (LSM), a multi-parameter polynomial regression model of retrieving ocean surface wind speed for HY-2 altimeter is presented in this paper. Its accuracy is about 0.157m/s when a single parameter of Ku band backscattering coefficient (σ
Ku
⁰
) is introduced into the polynomial model, while the retrieval wind speed accuracy can be greatly improved when the polynomial model includes C band backscattering coefficient (σ
C
⁰
) and significant wave height (SWH), in addition to Ku band SWH and σ
Ku
⁰
. The multi-parameter polynomial model based on LSM can be suitable for retrieving wind speed for HY-2 altimeter. The accuracy is good and acceptable.