Airborne Doppler lidar surface returns data products other than 机载多普勒激光雷达表面返回数据以外的产品

AirborneDopplerlidarsurfacereturns:dataproductsotherthantroposphericwindsG.D.EmmittandC.O’HandleySimpsonWeatherAssociatesCharlottesville,VA.Hangzhou,ChinaOctober,2002TODWL:theprogram

(TwinOtterDopplerWindLidar)SPAWARandONR35/SBIRProgramprovidedthelidarandsupporteditsintegrationintotheCIRPASTwinOtterIPOhasco-fundedthelidaradaptationtotheTwinOtter.IPOhassolelyfundedthemissionplanning,flighthours,datacollectionandthepostflightinstallationofthelidarinatrailerforinter-flightresearch.TODWL:theaircraftNavyTwinOtteroperatedbyCIRPASoutofMarina,CAUnpressurized(~10ftnormaloperations)Cruisespeeds100-140ktsEquipedwith:GPS/INSDropsondeaerosolprobestemperature,watervapor,turbulencesensorsTODWL:theinstrument2µmcoherentdetection4-6mJ(330nsecpulse)80Hzwatercooled~7-10%totalsystemefficiency10cmtwoaxisscanner,sidedoormountedGUIwithrealtimeinstrumentcontrolanddatadisplayWeight:250lbPower:1.5KWTODWL2-axisscannerTheExperimentsAirbornemissionsovervariouswaterbodies(openocean,surfzone,largerivers,lakesandwetlands)inthevicinityofMonterey,CALaboratorystudiesusingawaterslidetosimulateobservationsatdifferingincidenceanglesObjectivesCheckouttheoperationsofanairborne2µmcoherent,semi-hemisphericalscannedDWLInvestigatetheutilityofwatersurfacereturnsat2µmforspace-basedandairborneDWLs(ocean,lake,river,&wetlands)CompareDWLwindsoundingswithRAOBs,microwavesounders,mettowers,ground-basedDWLsandassortedsurfaceobservationsInvestigatetheuseofanairborneDWLtoprovidecal/valdataforscatterometersandRadarSatDemonstratetheapplicationofLAHDSSAforfuturespace-basedDWLmissions.CollectaerosoldataalongwithlidardatatoassistintheinterpretationofsignalsfromtheLASTODWLsoundinglookingup(20seconds)TODWLsoundinglookingdown(20seconds)MicrowavesoundingFtOrd(30minutes)0030UTCMarch2002AircraftflightlevelWatersurfacereturnsasafunctionofincidenceangleat2µmwithacoherentDopplerlidarModeledreflectancefromoceansurfaceforawindspeedof7.5m/s(Tratt,2002)alongwinddirectionCrosswinddirection

2004006001000800120014001600Rangefromaircraft(meters)LASreturnsWatersurfacereturnsNadirangleRelativespectralamplitude(rangecorrected)using400shotintegrationTODWLreturnscollectedoverMontereyBay,12March2002Singleshotdatausedtoobtain400shotaverageat~3degreesoffnadirWatersurfaceSingleshotdatausedtoobtain400shotaverageat~33degreesoffnadirWatersurfaceTODWLsignalasafunctionofnadirangleSpectrumforrangegate20associatedwiththedatashowninpreviousslide.ThedatahasnotbeenfullycorrectedfortheaircraftforwardmotionWaterLASObservingoceanwavemotionandtheatmosphericLayerAdjacenttotheSurface(LAS)MontereyBay12March2002InvestigationofOrganizedLargeEddieswithintheMarineAtmosphericBoundaryLayerSummaryInadditiontohorizontalandverticalwinds,anairborneDopplerlidarcanbeusedtostudywatersurfacemotionsandtheircorrelationswithaerosols.Thesecorrelationshavesignificanceintheinterpretationofdataobtainedwithspacebasedlidarsandalsotheparameterizationoffluxesoverwatersurfacesatwindspeedsabovethosethatproducewhitecaps.TheinvestigationofOrganizedLargeEddieswillbeamongtheobjectivesoffutureTODWLflightsAcknowledgementsThisworkwasfundedbytheOfficeofNavalResearchthroughtheCenterforInterdisciplinaryRemotely-pilotedAircraftStudiesandbytheIntegratedProgramOfficeofNPOESSTODWLTwinOtterDopplerWindLidarFundedbyUSNandIPOFirstFlightSeries11-15Feb.20022mlidar10cmscanner(1stofitskind)NavyTwinOtterOperatedbyCIRPASEquippedforaerosolsamplingVADStomeasureLOScomponentofaircraftTASSignals5kmaheadofaircraftforbackscattercalibrationusingparticleprobesPIs:EmmittandBluthTODWLobtainingawindprofileabovetheaircraftCTIParticleProbeClusterCloudStreetsoverMontereyBay,February,2002TODWL:participantsSimpsonWeatherAssociates(SWA)

G.D.Emmitt(gde@swa)

Sciencelead

C.O’Handley(coh@swa)

Dataprocessingandadvancedalgorithmdevelopment

S.Greco(sxg@swa)

Ancillarydatafromsounders,buoys,numericalmodelsandotherdatasourcesforcomparison

CenterforInterdisciplinaryRemotelyPilotedAircraftStudies(CIRPAS)R.Bluth(rtbluth@)

Platformlead

NavaRoy(nava_roy@hotmail)

Softwaresupport

HafJonsson(hjonsson@)

Aerosolprobedataresponsibility

MikeDuncan(mhduncan@)

Projectoversight

RoyWoods(rkwoods@)

Pilotandaircraftsystemsengineer

MikeHubbell(mhubbell@aol)

ChiefpilotCoherentTechnologiesIncorporated(CTI)

SteveShertz(steves@ctilidar)

TODWLwouldnothavehappenedwithouthistechnicalsupport

PhilGatt(philg@ctilidar)

ProjectresponsibilitywithinCTI.Alsoprovidedexperiencebasedinputto

theoperationsoftheTODWLlidar

RodMunson(RodneyM@ctilidar)

Softwaresupport.

UniversityofAlabamaatHuntsville(UAH)

DavidBowdle(David.Bowdle@)

Aerosol/Lidarbackscatter

UniversityofWashington(UW)

RalphFoster(ralph@)

Arran