机载气象雷达设备（英文版）2026

Number:CTSO-C63f

Dateofapproval:August17,2026

Approvedby:XuFeng

ChinaCivilAviationTechnicalStandardOrder

ThisChinaCivilAviationTechnicalStandardOrder(CTSO)isissuedaccordingto

Part37oftheChinaCivilAviationRegulations(CCAR-37).EachCTSOisacriterion

whichtheconcernedaeronauticalmaterials,partsorappliancesusedoncivilaircraftmustcomplywithwhenitispresentedforairworthinesscertification.

AirborneWeatherRadarEquipment

1.Purpose.

ThisChinaCivilAviationTechnicalStandardOrder(CTSO)isformanufacturersapplyingforaCTSOauthorization(CTSOA).ThisCTSOspecifiestheminimumperformancestandards(MPS)thattheairborneweatherradarequipmentmustmeetforapprovalandidentificationwiththeapplicableCTSOmarking.ThisCTSOaddressesweatherdetectionandgroundmapping,forwardlookingwindsheardetection,forwardlookingturbulencedetection,andatmosphericthreatawarenesscapability.Itdoesnotincludeflightguidancesystemfunctionalityinsupportofanapprovedwindsheardetectionandavoidancesystem.

2.Applicability.

ThisCTSOaffectsnewapplicationssubmittedafteritseffective

date.

a.AsoftheeffectivedateofthisCTSO,anyapplicantseekingaCTSOAforairborneweatherradarshallsubmitanapplicationin

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accordancewiththisCTSO.Nevertheless,ifwithinonemonthfollowingtheeffectivedateofthisCTSO,theapplicantcandemonstratetotheauthoritythatitsdevelopmentworkhasbeenconductedincompliancewiththeminimumperformancestandardsofthepreviousversionpriortotheentryintoforceofthisnewversion,theapplicantmayfiletheapplicationagainstthepreviouseditionoftheCTSO.

b.AirborneweatherradarequipmentapprovedunderapreviousCTSOmaystillbemanufacturedundertheprovisionsofitsoriginalapproval.

c.MajordesignchangestoarticleapprovedunderthisCTSOwillrequireanewauthorizationofCTSOinaccordancewithsection21.353ofCCAR-21-R5.

3.Requirements.

NewmodelsofairborneweatherradaridentifiedandmanufacturedonoraftertheeffectivedateofthisCTSOmustmeettheMPSqualificationanddocumentationrequirementssetforthinRTCADocument,DO-220A,Change1(datedAugust17,2018),MinimumOperationalPerformanceStandardsforAirborneWeatherRadarSystems,aswellasthesupplementaryprovisionssetforthinAppendix1andAppendix2tothisCTSO(whereapplicable).EquipmenttypesaredefinedinTable1.

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Table1–AirborneWeatherRadarEquipmentClassesandApplicableMPS

EquipmentClass

EquipmentType

MinimumPerformanceStandards

A

Forward-LookingWindshear

DetectionCapability

RTCA/DO-220A,Change1,section2.2,withthefollowingexclusions:paragraphs.6,.7,2.2.2,2.2.4,and2.2.5.

B

Forward-LookingTurbulence

DetectionCapability

RTCA/DO-220A,Change1,section2.2,withthefollowingexclusions:paragraphs.5,.7,2.2.2,2.2.3,and2.2.5.

C

AirborneWeatherandGround

MappingRadar

RTCA/DO-220A,Change1,section2.2,withthefollowingexclusions:paragraphs.5,.6,.7,2.2.3,2.2.4,and2.2.5.

D

AtmosphericThreatAwareness

Capability

RTCA/DO-220A,Change1,section2.2,withthefollowingexclusions:paragraphs.5,.6,2.2.2,2.2.3,and2.2.4.

a.Functionality.

ThisCTSOappliestoequipmentintendedto:

(1)Provideairbornewindsheardetection(EquipmentClassA).EquipmentClassAprovidesforward-lookingwindsheardetectionfunctionality.However,thisCTSOdoesnotincludeflightguidancesystemfunctionalityinsupportofanapprovedwindsheardetectionandavoidancesystem.

(2)Provideadvancedandadvisoryindicationofpotentiallyhazardousturbulenceconditionsdetectablebyradar,togetherwithother

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flightinformation,toassistpilotswithturbulenceavoidancedecisions(EquipmentClassB).

(3)Detectanddisplayechoesfromprecipitationtoassistinflightcrewanalysisofweather.Maintaincontactwithgeographicfeaturessuchasinternationalshorelineboundariesasasupplementtonavigationalorientation(EquipmentClassC).

(4)Providetimelyandadvisoryinformationtopilotstoenhancetheirsituationalawarenessofatmosphericactivityandassistwithatmosphericthreatavoidancedecisions(EquipmentClassD).

b.FailureConditionClassifications.

(1)Failureofthefunctiondefinedinparagraphs3.a(2)or3.a(4)resultinginunannunciatedmalfunctionormisseddetectionofthefunctionisaminorfailurecondition.

(2)Failureofthefunctiondefinedinparagraph3.a(1)or3.a(3)resultinginunannunciatedmalfunctionormisseddetectionofthefunctionisamajorfailurecondition.

(3)Lossofthefunctionsdefinedinparagraph3.aisaminorfailurecondition.

(4)Designthesystemtoatleastthesefailureconditionclassifications.

c.FunctionalQualification.

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DemonstratetherequiredfunctionalperformanceunderthetestconditionsspecifiedinRTCA/DO-220A,Change1,aswellasthesupplementaryprovisionssetforthinAppendix1andAppendix2tothisCTSO(whereapplicable),foreachincludedequipmentclass,asspecifiedinTable2.

Table2–AirborneWeatherRadarEquipmentClassesandApplicableTestRequirements

EquipmentClass

PerformanceTestRequirements

A

RTCA/DO-220A,Change1paragraphs,,andinsection2.4.

B

RTCA/DO-220A,Change1paragraphs,,andinsection2.4.

C

RTCA/DO-220A,Change1paragraphsandinsection2.4.

D

RTCA/DO-220A,Change1paragraphs,,andinsection2.4.

d.EnvironmentalQualification.

Forallequipmentclasses,demonstratetherequiredperformanceunderthetestconditionsspecifiedinRTCA/DO-220A,Change1,Section2.3,usingstandardenvironmentalconditionsandtestproceduresappropriateforairborneequipment.YoumayusedifferentstandardenvironmentalconditionsandtestproceduresthanspecifiedinRTCA/DO-220A,Change1,providedthestandardisappropriatefortheairborneweatherradar.

Note:TheuseofRTCA/DO-160D(withChanges1and2only,withoutChange3incorporated)orearlierversionsisgenerallynotconsideredappropriateandwillrequiresubstantiationviathedeviationprocessasdiscussedinparagraph

3.gofthisCTSO.

e.SoftwareQualification.

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Ifthearticleincludessoftware,developthesoftwareaccordingtoRTCA,Inc.,documentDO-178C,SoftwareConsiderationsinAirborneSystemsandEquipmentCertification,datedDecember13,2011,includingreferencedsupplementsasapplicable,toatleastthesoftwarelevelconsistentwiththefailureconditionclassificationdefinedinparagraph3.bofthisCTSO.YoumayalsodevelopthesoftwareaccordingtoRTCA,Inc.documentRTCA/DO-178B,datedDecember1,1992,ifyoufollowtheguidanceinAC20-115D,AirborneSoftwareDevelopmentAssuranceUsingEUROCAEED-12()andRTCADO-178(),datedJuly21,2017,orlatestrevision.

f.ElectronicHardwareQualification.

Ifthearticleincludescomplexcustomairborneelectronichardware,thendevelopthecomponentaccordingtoRTCAInc.,Document,RTCA/DO-254,DesignAssuranceGuidanceforAirborneElectronicHardware,datedApril19,2000,toatleastthedesignassurancelevelconsistentwiththefailureconditionclassificationdefinedinparagraph3.bofthisCTSO.Forcustomairborneelectronichardwaredeterminedtobesimple,RTCA/DO-254,paragraph1.6applies.

g.Deviations.

Forusingalternativeorequivalentmeansofcompliancetothe

criteriaintheMPSofthisCTSO,theapplicantmustdemonstratethatthe

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equipmentmaintainsanequivalentlevelofsafety.Applyforadeviationpursuantto21.368(a)inCCAR-21-R5.

4.Marking.

a.Markatleastonemajorcomponentpermanentlyandlegiblywithall

theinformationin21.423(b)ofCCAR-21-R5.Themarkingmustincludetheserialnumber.

b.Ifthearticleincludessoftwareand/orairborneelectronichardware,

thenthearticlepartnumberingschememustidentifythesoftwareandairborneelectronichardwareconfiguration.Thepartnumberingschemecanuseseparate,uniquepartnumbersforsoftware,hardware,andairborneelectronichardware.

c.Youmayuseelectronicpartmarkingtoidentifysoftwareorairborne

electronichardwarecomponentsbyembeddingtheidentificationwithinthehardwarecomponentitself(usingsoftware)ratherthanmarkingitontheequipmentnameplate.Ifelectronicmarkingisused,itmustbereadilyaccessiblewithouttheuseofspecialtoolsorequipment.

5.ApplicationDataRequirements.

YoumustgiveCAACastatementofconformance,pursuantto

section21.353(a)(1)inCCAR-21-R5andonecopyeachofthefollowingtechnicaldatatosupportyourdesignandproductionapproval.

a.Manualscontainingthefollowing:

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(1)Operatinginstructionsandarticlelimitationssufficientto

describetheequipment’soperationalcapability.

(2)ForEquipmentClassB,identifytheinstallationinstructionsfor

theidentifiedAircraftClassselectedfromRTCA/DO-220A,Change1paragraph,Table2-4.

(3)Expectedradomeperformancefortheelectromagneticsignals

passingthroughit(paragraph2.2.ofRTCA/DO-213A,Change1,MinimumOperationalPerformanceStandardsforNose-MountedRadomes,datedJune21,2018).

(4)Weatherperformanceindex(range)inaccordancewiththe

requirementsofRTCA/DO-220A,Change1.

(5)Windsheardetectionrangeinaccordancewiththerequirements

ofRTCA/DO-220A,Change1.

(6)Detaileddescriptionofanydeviations.

(7)Installationproceduresandlimitationssufficienttoensurethat

theairborneweatherradar,wheninstalledaccordingtotheinstallationoroperationalprocedures,stillmeetsthisCTSO’srequirements.Limitationsmustidentifyanyuniqueaspectsoftheinstallation.Thelimitationsmustalsoincludeanotewiththefollowingstatement:

“ThisarticlemeetstheminimumrequirementsofCTSO-C63f.

Installationofthisarticlerequiresseparateapproval.”

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(8)Foreachuniqueconfigurationofsoftwareandairborne

electronichardware,referencethefollowing:

(a)Softwarepartnumberincludingrevisionanddesign

assurancelevel;

(b)Airborneelectronichardwarepartnumberincludingrevision

anddesignassurancelevel;and

(c)Functionaldescription.

(9)Asummaryofthetestconditionsusedforenvironmental

qualificationsforeachcomponentofthearticle.Forexample,aformasdescribedinRTCA/DO-160G,EnvironmentalConditionsandTestProceduresforAirborneEquipment,AppendixA.

(10)Schematicdrawings,wiringdiagrams,andanyother

documentationnecessaryforinstallationoftheairborneweatherradar.

(11)Bypartnumber,listofreplaceablecomponentsthatmakeupthe

airborneweatherradar.Includevendorpartnumbercross-references,whenapplicable.

b.Instructionscoveringperiodicmaintenance,calibration,andrepair,

toensurethattheairborneweatherradarcontinuestomeettheCTSOapproveddesign.Includerecommendedinspectionintervalsandservicelife,asappropriate.

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c.Ifthearticleincludessoftware:aplanforsoftwareaspectsof

certification(PSAC)softwareconfigurationindex,andasoftwareaccomplishmentsummary.

d.Ifthearticleincludessimpleorcomplexcustomairborneelectronic

hardware:aplanforhardwareaspectsofcertification(PHAC),ahardwareverificationplan,top-leveldrawing,andhardwareaccomplishmentsummary(orsimilardocument,asapplicable).

e.Adrawingdepictinghowthearticlewillbemarkedwiththe

informationrequiredbyparagraph4ofthisCTSO.

f.Identifyfunctionalitycontainedinthearticlenotevaluatedunder

paragraph3ofthisCTSO(definedasnon-CTSOfunctions).Non-CTSOfunctionscanbeacceptedinparallelwiththeCTSOA.Forthosenon-CTSOfunctionstobeaccepted,youmustdeclarethesefunctionsandincludethefollowinginformationwithyourCTSOapplication:

(1)Descriptionofthenon-CTSOfunction(s),suchasperformance

specifications,failureconditionclassifications,software,hardware,andenvironmentalqualificationlevels.Includeastatementconfirmingthatthenon-CTSOfunction(s)donotinterferewiththearticle’scompliancewiththerequirementsofparagraph3.

(2)Installationproceduresandlimitationssufficienttoensurethat

thenon-CTSOfunction(s)meetsthedeclaredfunctionsandperformancespecification(s)describedinparagraph5.f.(1).

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(3)Instructionsforcontinuedperformanceapplicabletothe

non-CTSOfunction(s)describedinparagraph5.f.(1).

(4)Interfacerequirementsandapplicableinstallationtestprocedures

toensurecompliancewiththenon-CTSOfunction(s)performancedatadefinedinparagraph5.f.(1).

(5)Testplansandanalysis,asappropriate,toverifytheperformance

ofthehostingCTSOarticleisnotaffectedbythenon-CTSOfunction(s).

(6)Testplansandanalysis,asappropriate,toverifythatthefunction

andperformanceofthenon-CTSOfunction(s)asdescribedinparagraph

5.f.(1).

g.Thequalitysystemdescriptionrequiredbysection21.358of

CCAR-21-R5,includingfunctionaltestspecifications.ThequalitysystemmustensurethatyouwilldetectanychangetotheapproveddesignthatcouldadverselyaffectcompliancewiththeCTSOMPS,andrejectthearticleaccordingly.ApplicantswhocurrentlyholdCTSOAsmustsubmitrevisionstotheexistingqualitymanualasnecessary(notrequiredforapplicantsthatdon’tholdCTSOAs).

h.Provideadescriptionoftheorganizationasrequiredby21.355of

CCAR-21-R5.

i.Materialandprocessspecificationslist.

j.Alistofalldrawingsandprocesses(includingrevisionlevel)that

definethearticle’sdesign.

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k.Manufacturer’sCTSOqualificationreportshowingresultsoftesting

accomplishedaccordingtoparagraph3.cofthisCTSO.

6.ManufacturerDataRequirements.

BesidesthedatagivendirectlytoCAAC,havethefollowing

technicaldataavailableforreviewbyCAAC:

a.Functionalqualificationspecificationsforqualifyingeach

productionarticletoensurecompliancewiththisCTSO.

b.Articlecalibrationprocedures.

c.Schematicdrawings.

d.Wiringdiagrams.

e.Materialandprocessspecifications.

f.Theresultsoftheenvironmentalqualificationtestsconducted

accordingtoparagraph3.dofthisCTSO.

g.Ifthearticleincludessoftware,theappropriatedocumentation

definedinRTCA/DO-178BorRTCA/DO-178Cspecifiedinparagraph3.eofthisCTSO,includingalldatasupportingtheapplicableobjectivesinAnnexA,ProcessObjectivesandOutputsbySoftwareLevelofRTCA/DO-178BorRTCA/DO-178C.

h.Ifthearticleincludescomplexcustomairborneelectronichardware,

theappropriatehardwarelife-cycledataincombinationwithdesignassurancelevel,asdefinedinRTCA/DO-254,AppendixA,TableA-l.Forsimplecustomairborneelectronichardware,thefollowingdataare

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required:testcasesorprocedures,testresults,testcoverageanalysis,toolassessmentandqualificationdata,andconfigurationmanagementrecords,includingproblemreports.

i.Ifthearticlecontainsnon-CTSOfunction(s),youmustalsomake

items6.athrough6.havailableastheypertaintothenon-CTSOfunction(s).

7.FurnishedDataRequirements.

a.Whenfurnishingoneormorearticlesmanufacturedunderthis

CTSOtooneentity(suchasanoperatororrepairstation),provideonecopyoron-lineaccesstothedatainparagraphs5.aand5.bofthisCTSO.Addanyotherdataneededfortheproperinstallation,certification,use,orcontinuedcompliancewiththeCTSO,oftheairborneweatherradarequipment.

b.Ifthearticlecontainsdeclarednon-CTSOfunction(s),includeone

copyofthedatainparagraphs5.f.(1)through5.f.(4).

c.Ifthearticlecontainssoftware,includeonecopyoftheOpen

ProblemReport(OPR)summarytotypecertification,supplementaltypecertification,oramendedtypecertificationdesignapprovalholders.

8.ReferencedDocuments.

a.OrderRTCAdocumentsfromRTCAInc.115018thStreetNW,Suite

910,Washington,D.C.20036.Youcanalsoordercopiesonlineat

.

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Appendix1:EquivalenttoAirportsforClutterRecordingand

EquivalenttoRadarSimulationSystems

1.GroundClutter

Section.3ofthetestproceduresforthemandatorywindshear

alertrangespecifiedinRTCA/DO-220AChange1,Section,stipulatesthattheclutterdatabaserecordedaturbanairportforrealaircrafttakeoffandlandingmustbeusedforwindsheardetectionperformanceverification.Section.6ofthetestproceduresforwindshearfalsealarmsspecifiedinsectionstipulatesthatcomplianceverificationforfalsealarmratesmustdemonstratethattheequipmentdoesnotgeneratefalsealarmsinclutterenvironmentatastressingairport,andmustdemonstratethattheequipmentemployseffectivecluttersuppressiontechnology.AppendixA.2ofRTCA/DO-220AChange1suggestsintroducingthecollectedclutterdataintotheADWRSinthewindsheardetectionperformanceverification.AppendixA.2alsopresentstheprinciplesofrecordingurbanairportclutterdata,andthecalculationofradarechosignalsconsideringthecollectedclutterdata.AppendixA.3providesthewindshearscenarioswherethecluttermodelswereapplied.AppendixCprovidesanalyticalcalculationtechniquesformisseddetectioneventsandnuisancealarmassessments.inwhichfalsealarmscausedbycluttermaybeintroducedornotintroduced.

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Thisappendixstipulatesthattherecordingofurbanairportclutter

datashallcomplywithappendixA.2.4ofRTCA/DO-220AChange1.TheairportssuggestedinappendixA.2.4,namelyNewarkAirport,WashingtonNationalAirport,andDenverStapletonAirport,maybesubstitutedwithotherairports.TheapplicantmustdemonstratethattheusedairportsshallproducetheclutterwithcharacteristicsdescribedinappendixA.2.4ofRTCA/DO-220AChange1.Inaccordancewiththewindshearmust-alertrangetestproceduresspecifiedinsection.3,theactualcollectedurbanairportclutterdatamustbeusedwhenconductingthecomplianceverificationactivitiesundersection.3.

2.ADWRS(AirborneWeatherRadarSimulationSystem)

TheADWRSdevelopedbyNASALangleyResearchCenterisa

softwaresystemthatimplementscomprehensiveradarechocalculationsandcharacterizationforairbornecoherentpulse-Dopplerweatherradarsystems.Itsearlyversionswereusedforsimulationcalculationsofwindsheardetection,whilelaterversionsdevelopthecapabilityofrelevantsimulationcalculationsforturbulence.section

(Forward-LookingWindShearTestProcedures)andsection(Forward-LookingTurbulenceTestProcedures)ofRTCA/DO-220AChange1bothrequiretheuseofADWRStocompletesimulationverificationofwindshearandturbulencedetectionperformance.AppendixAofRTCA/DO-220AChange1providesadetailed

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introductiontoADWRS,aswellasinstructionsonhowtointegratecollectedurbanairportclutterdataintoADWRSforwindsheardetectionperformancesimulation.

ThisappendixstipulatesthattheADWRSsoftwaretoolrequiredin

sectionsandofRTCA/DO-220AChange1maybesubstitutedwithothersimulationtools,providedthattheapplicantdemonstratesthattheintendedradarsimulationsoftwarecomplieswithsection.1.2.2ofRTCA/DO-220AChange1,i.e.,validationofradarsystemsimulator.

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Appendix2:AirborneActivePhasedArrayWeatherRadar

1.Purpose

Theairborneactivephasedarrayweatherradaremploysadvanced

activeantennas,achievingbeamsteeringbycontrollingthephaserelationshipsofindividualradiatingelements.Thisenablesforward-lookingwindsheardetection,forward-lookingturbulencedetection,weatherdetectionandgroundmapping,andatmosphericthreatawarenesscapabilities.Comparedwithtraditionalmechanicallyscannedweatherradars,ithasadvantagessuchasfasterscanningandhigherintegrationlevel.Thisappendixstipulatesthefollowingrequirementsfora