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【英文标准名称】:StandardGuideforMeasurementofAtmosphericWindandTurbulenceProfilesbyAcousticMeans
【原文标准名称】:用声学方法测量大气气流和湍流剖面的标准指南
【标准号】:ASTMD7145-2005(2010)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D22.11
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:acousticsounder;remotesensing;sodar;windprofiler;windprofiling;Wind;Acousticaltests;Airqualityanalysis;Sodar;Turbulence
【摘要】:Sodarshavefoundwideapplicationsfortheremotemeasurementofwindandturbulenceprofilesintheatmosphere,particularlyinthegapbetweenmeteorologicaltowersandthelowerrangegatesofwindprofilingradars.Thesodarx2019;sfarfieldacousticpowerisalsousedforrefractiveindexcalculationsandtoestimateatmosphericstability,heatflux,andmixedlayerdepth(1-5).Sodarsareusefulforthesepurposesbecauseofstronginteractionbetweensoundwavesandtheatmospherex2019;sthermalandvelocitymicro-structurethatproduceacousticreturnswithsubstantialsignal-to-noiseratios(SNR).ThereturnedechoesareDoppler-shiftedinfrequency.Thisfrequencyshift,proportionaltotheradialvelocityofthescatteringsurface,providesthebasisforwindmeasurement.Advantagesofferedbysodarwindsoundingtechnologyincludereasonablylowprocurement,operating,andmaintenancecosts,noemissionsofeye-damaginglightbeamsorelectromagneticradiationrequiringfrequencyclearances,andadjustablefrequenciesandpulselengthsthatcanbeusedtooptimizedataqualityatdesiredrangesandrangeresolutions.Whenproperlysitedandusedwithadequatesamplingmethods,sodarscanprovidecontinuouswindandturbulenceprofileinformationatheightrangesfromafewtensofmeterstooverakilometrefortypicalaveragingperiodsof1to60minutes.1.1Thisguidedescribestheapplicationofacousticremotesensingformeasuringatmosphericwindandturbulenceprofiles.Itincludesasummaryofthefundamentalsofatmosphericsounddetectionandranging(sodar),adescriptionofthemethodologyandequipmentusedforsodarapplications,factorstoconsiderduringsiteselectionandequipmentinstallation,andrecommendedproceduresforacquiringvalidandrelevantdata.1.2Thisguideappliesprincipallytopulsedmonostaticsodartechniquesasappliedtowindandturbulencemeasurementintheopenatmosphere,althoughmanyofthedefinitionsandprinciplesarealsoapplicabletobistaticconfigurations.Thisguideisnotdirectlyapplicabletoradio-acousticsoundingsystems(RASS),ortomographicmethods.
【中国标准分类号】:A42
【国际标准分类号】:17_140_99
【页数】:9P.;A4
【正文语种】:英语