By analyzing the law of Sigma variation with wind speed and relative azimuth

a new approach based on atlas properties is derived in this paper. The approach is different from traditional ones which are ranging methods based on least probability error. Without the need of variance

it can retrieve sea wind just by atlas information. 218623 data were in the experiment

and it turned out that the wind vector result was close to L2B data. Mean relative error of wind speed is 7.4%

and mean error of wind direction is 9.5°.