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1、第36卷第3期飞行器测控学报Vo.l36No.32017年6月JournalofSpacecraftTT&CTechnologyJune2017引用格式:徐飞,孙协昌,刘馨宁,等.利用机载GNSS-R的有效波高反演技术[J].飞行器测控学报,2017,36(3):212-218.XuFei,SunXiechang,LiuXinning,eta.lAmethodofretrievalofsignificantwaveheightusingairborneGNSS-R[J].JournalofSpacec
2、raftTT&CTechnology,2017,36(3):212-218.利用机载GNSS-R的有效波高反演技术*徐飞,孙协昌,刘馨宁,李瑞东,黄宇,李勐(航天恒星科技有限公司·北京·100086)摘要:采用自主研发的多源多宿GNSS-R(GlobalNavigationSatelliteSystem-Reflections,全球导航卫星系统反射信号)海洋环境遥感探测系统,在天津渤海湾特定区域进行了3次机载校飞试验,获得了大量有效GNSS-R信号数据,对自然条件下的海面有效波高进行了反演处理。该系统
3、通过对接收的GNSS直达信号和海面反射信号进行相关运算处理,可以获得DDM(Delay-DopplerMapping,时延—多普勒映射)图谱,再利用DCF(DerivativeoftheCorrelationFunction,相关函数的导数)在DDM图谱基础上进行相关功率波形的计算,进而通过计算DCF的函数波形宽度得到海面有效波高,验证了该方法的可行性。该方法具有全天时、全天候、高分辨率、低成本等优点,对全球范围内中小尺度海洋状态和物理现象的监测具有重要意义。关键词:全球导航卫星系统反射信号(GNSS
4、-R);有效波高;时延—多普勒映射(DDM)图谱;相关函数的导数(DCF);多源多宿中图分类号:V556;TN967文献标志码:A文章编号:1674-5620(2017)03-0212-07DOI:10.7642/.jissn.1674-5620.2017-03-0212-07AMethodofRetrievalofSignificantWaveHeightUsingAirborneGNSS-RXUFei,SUNXiechang,LIUXinning,LIRuidong,HUANGYu,LIMeng(
5、SpaceStarTechnologyCo.,Ltd.,Beijing100086)Abstract:Amarineenvironmentremotesensingsystembasedonmult-isourceandmult-idestinationGlobalNavigationSat-elliteSystem-Reflections(GNSS-R)technologyisintroducedinthispape.rThesystemwasindependentlydevelopedanduse
6、dinthreeairborneflighttestsinspecificareaofBohaiBaynearTianjin.AsignificantamountofeffectiveGNSS-Rsignaldatawascollectedandsignificantwaveheightundernaturalconditionswasretrieved.ThesystemreceivedGNSSdirectsig-nalsandreflectedsignalsofthesea,thengenerat
7、edDelay-DopplerMapping(DDM)imagerybycorrelationprocessofthesignals.CorrelationpowerwaveformoftheDDMmapwascalculatedusingDerivativeoftheCorrelationFunction(DCF).Then,significantwaveheightwascalculatedthroughDCFwaveformwidth.Feasibilityofthemethodisverifi
8、ed.Itworkedunderal-lweatherandal-ldayconditionswiththeadvantagesofhighresolutionandlowcost,demonstratingsignificanceformonitoringsmallandmediumscaleoceanstatesandphysicalphenomena.Keywords:GlobalNavigationSatelliteSystem-Reflecti
