海洋气象学报2024，Vol.44Issue(4)：22-29,8.DOI:10.19513/j.cnki.hyqxxb.20240516002
中法海洋卫星微波散射计风场产品精度评价
Evaluation of accuracy of CSCAT wind vector data
摘要
Abstract
The China-France Oceanography SATellite(CFOSAT)SC ATterometer,namely CSCAT,firstly adopts a new observing scheme of Ku-band fan-beam rotary scanning system,measures the same wind vector cell from more incidence angles,and thus improves the accuracy of sea surface wind observations in contrast with the pencil-beam rotary scanning system.Based on the raw spatial resolution of 10.0 kmx12.5 km,the standard product of 25.0 km and coast product of 12.5 km are processed.Referencing the validation technology system,this paper presents the val idation results of the two CSCAT products.The validation results show that compared with the data of NDBC(National Data Buoy Center)buoys,the root mean square error of CSCAT wind speed and wind direction is less than 1 m·s-1 and 17°,respectively.ERA5 reanalysis data is used to analyze the accuracy characteristics of the two different resolution products with different wind speeds and cross-track locations of the wind vector cells.At the same time,the ambiguity removal ability of CSCAT wind field products is analyzed.The comparison of accuracy characteristics shows that the accuracy of the standard product is better than that of the coast product.If users are more concerned about product accuracy,the standard product is recommended.So,the evaluations by the validation technology system are important for the performance monitoring of CSCAT during on-orbit operation,help users to fully understand the accuracy characteristics of CSCAT wind products,and promote the quantitative application of CSCAT wind products.关键词
中法海洋卫星(CFOSAT)/微波散射计/中法散射计(CSCAT)/海面风场/真实性检验Key words
China-France Oceanography SATellite(CFOSAT)/microwave scatterometer/CFOSAT SCATterometer(CSCAT)/sea surface wind field/validation分类
航空航天引用本文复制引用
穆博,郎姝燕,卫然,孙从容,杨晟..中法海洋卫星微波散射计风场产品精度评价[J].海洋气象学报,2024,44(4):22-29,8.基金项目
国家重点研发计划项目(2021YFC3101502) （2021YFC3101502）
