The invention discloses a
sea surface wind speed inversion method and
system based on a CYGNSS and Willoughby model, and belongs to the technical field of ocean
remote sensing. The method comprises the following steps: firstly, extracting a
cyclone parameter from IBTrACS data through a Willoughby model, and encrypting the
cyclone parameter to 1 second for sampling by utilizing segmented three times of
Hermite interpolation; screening CYGNSS
mirror reflection points and constructing a
data set in combination with a space matching
algorithm;
processing CYGNSS L1-
level data and extracting observation parameters; establishing a basic GMF (
Gaussian Mixture Function) according to incidence angle grouping, and optimizing the weight through nonlinear fitting; the Willoughby model
wind speed and the basic GMF are fused to generate an enhanced GMF, the DDM
signal-to-
noise ratio is dynamically adjusted in combination with minimum variance
estimation, and the precision is improved. According to the method, the GNSS-R technology is utilized to overcome the defects of high cost, limited coverage and the like of a traditional method, the
sea surface wind speed monitoring reliability under the
extreme weather is enhanced through collaborative optimization of a
physical model and actually measured data, and the method has the advantages of low cost, wide coverage and
interference resistance and is suitable for refined marine meteorological monitoring.