CAJ | 학술논문

本文对海洋二号卫星微波散射计（Haiyang-2 Scatterometer，HY-2 SCAT）进行了海洋定标算法研究，并使用数值天气预报模型风场（Numerical Weather Prediction，NWP）和浮标数据对定标后反演风场进行联合验证．通过匹配2012年12月份的 HY-2 SCAT 反演风场、NWP 风场及浮标的观测数据，共得到无降雨条件下的3112个25km 分辨率的匹配数据．对匹配数据进行分析时，采用基于变量的误差分析方法能够得到比传统线性回归方法更精确的验证结果．选取在风场 U、V 分量进行联合验证能得到较在风速、风向上更为有利的验证结果．验证结果表明，经过海洋定标法之后的HY-2 SCAT 测量后向散射系数的误差残余小于0.15dB，其反演风场与浮标及 NWP 数据相吻合，U、V 分量相对浮标及NWP 数据偏差均小于0.23m／s，验证了该定标算法的有效性及定标后反演风场的高精度．
본문대해양이호위성미파산사계（Haiyang-2 Scatterometer，HY-2 SCAT）진행료해양정표산법연구，병사용수치천기예보모형풍장（Numerical Weather Prediction，NWP）화부표수거대정표후반연풍장진행연합험증．통과필배2012년12월빈적 HY-2 SCAT 반연풍장、NWP 풍장급부표적관측수거，공득도무강우조건하적3112개25km 분변솔적필배수거．대필배수거진행분석시，채용기우변량적오차분석방법능구득도비전통선성회귀방법경정학적험증결과．선취재풍장 U、V 분량진행연합험증능득도교재풍속、풍향상경위유리적험증결과．험증결과표명，경과해양정표법지후적HY-2 SCAT 측량후향산사계수적오차잔여소우0.15dB，기반연풍장여부표급 NWP 수거상문합，U、V 분량상대부표급NWP 수거편차균소우0.23m／s，험증료해정표산법적유효성급정표후반연풍장적고정도．
The scatterometer onboard HY-2 satellite is calibrated using Numerical Ocean Calibration and its retrieval winds after calibration are validated from 130 global buoys and winds from the European Centre for Medium-Range Weather Foresting Nu-merical Weather Prediction model using triple-collocation during December 2012,resulting in 3112 collocated triplets.The KNMI QC flag is used to collocate the data without rain efforts.It is found that functional relationship employing the error-in-variables method is more accuracy than that using linear regression for the validation of retrieval wind from HY-2 scatterometer.Moreover, using the wind component domain is confirmed to be favourable.It is shown that the uncertainties after ocean calibration is less than 0.15dB,resulting in 0.2m/s systematic wind effects.For both zonal and meridional winds,the similar wind fields comparing with buoys and ECMWF indicate that the effective of the calibration and high quality of the retrieval winds.