RTCM电文类型具体格式

©RTCM–NotforreproductionorredistributionRTCM10403.1RTCMPaper177-2006-SC104-STDRTCMSTANDARD10403.1FORDIFFERENTIALGNSS(GLOBALNAVIGATIONSATELLITESYSTEMS)SERVICES–VERSION3DEVELOPEDBYRTCMSPECIALCOMMITTEENO.104OCTOBER27,2006COPYRIGHT©2006RTCMRadioTechnicalCommissionForMaritimeServices1800N.KentSt.,Suite1060Arlington,Virginia22209E-Mail:[e-mail]:©RTCM–NotforreproductionorredistributionTheRadioTechnicalCommissionForMaritimeServices(RTCM)isanincorporatednon-profitorganization,withparticipationinitsworkbyinternationalrepresentationfrombothgovernmentandnon-governmentorganizations.TheRTCMdoesnotworktoinducesales,itdoesnottestorendorseproducts,anditdoesnotmonitororenforcetheuseofitsstandards.TheRTCMdoesnotengageinthedesign,sale,manufactureordistributionofequipmentorinanywaycontroltheuseofthisstandardbyanymanufacturer,serviceprovider,oruser.Useof,andadherenceto,thisstandardisentirelywithinthecontrolanddiscretionofeachmanufacturer,serviceprovider,anduser.ForinformationonRTCMDocumentsoronparticipationindevelopmentoffutureRTCMdocumentscontact:RadioTechnicalCommissionForMaritimeServices1800N.KentSt.,Suite1060Arlington,Virginia22209-2109USATelephone:[phone]Telefax:[phone]E-Mail:[e-mail]©RTCM–NotforreproductionorredistributionRTCM10403.1RTCMPaper177-2006-SC104-STDRTCMSTANDARD10403.1FORDIFFERENTIALGNSS(GLOBALNAVIGATIONSATELLITESYSTEMS)SERVICES–VERSION3DEVELOPEDBYRTCMSPECIALCOMMITTEENO.104OCTOBER27,2006COPYRIGHT©2006RTCMRadioTechnicalCommissionForMaritimeServices1800N.KentSt.,Suite1060Arlington,Virginia22209E-Mail:[e-mail]:©RTCM–NotforreproductionorredistributionThispageintentionallyleftblank.©RTCM–NotforreproductionorredistributionRTCM10403.1iPREFACEThisstandardhasbeendevelopedbyRTCMSC-104asamoreefficientalternativetothedocumentsentitledRTCMRecommendedStandardsforDifferentialNavstarGPSService,Version2.x”.ServiceprovidersandvendorsrepresentedontheSC-104Committeerequestedthedevelopmentofanewstandardthatwouldbemoreefficient,easytouse,andmoreeasilyadaptabletonewsituations.ThemaincomplaintwasthattheVersion2parityscheme,whichuseswordswith24bitsofdatafollowedby6bitsofparity,waswastefulofbandwidth.Anothercomplaintwasthattheparitywasnotindependentfromwordtoword.Stillanotherwasthatevenwithsomanybitsdevotedtoparity,theactualintegrityofthemessagewasnotashighasitshouldbe.Plus,30-bitwordsareawkwardtohandle.Thenewstandard,Version3,isintendedtocorrecttheseweaknesses.UnlikeVersion2.x,theVersion3standardsdonotincludetentativemessages.ThemessagesinVersion3haveundergonetestingforvalidityandinteroperability,andareconsideredtobepermanent.Futuremodificationsofthestandardmaychangethemeaningofreservedbitsorprovideadditionalclarifyingtext,butnochangeswillbemadeinthedatafields.Changeswillrequirenewmessagestobedeveloped.Inadditiontothemessagesdescribedinthisdocument,theCommitteeisalsodevelopinganumberofnewmessages,whicharedescribedinaseparatedocument.Asnewmessagesandcapabilitieshavebeendemonstratedthroughvalidityandinteroperabilitytesting,theywillbeincorporatedintofutureversionsoftheVersion3standard,eitherasSupplementsorasanewrevisionofstandard10403.x.Supplementswillbemadeavailableelectronicallytothosewhohavepurchasedthestandard.Periodically,accumulatedSupplementswillbeincorporatedintoacompleterevisionofstandard10403.x.Theinitialreleaseofthenewstandard,i.e.,Version3.0(RTCMPaper30-2004/SC104-STD),consistedprimarilyofmessagesdesignedtosupportreal-timekinematic(RTK)operations.ThereasonforthisemphasiswasthatRTKoperationinvolvesbroadcastingalotofinformation,andthusbenefitsthemostfromanefficientdataformat.Version3.0providedmessagesthatsupportedGPSandGLONASSRTKoperations,includingcodeandcarrierphaseobservables,antennaparameters,andancillarysystemparameters.Thisrelease,Version3.1–nowdesignatedasRTCMStandard10403.1,incorporatesGPSNetworkCorrections,whichenableamobilereceivertoobtainaccurateRTKinformationvalidoveralargearea.Inaddition,newGPSandGLONASSmessagesprovideorbitalparameterstoassistinrapidacquisition.AUnicodetextmessageisalsoprovidedforthetransmissionoftextualdata.Finally,asetofmessagesarereservedforvendorswhowanttoencapsulateproprietarydataintheirbroadcasts.RTCMSC-104believesthatthenewStandard10403.1forDGNSSserviceswillproveusefulinsupportinghighlyaccuratedifferentialandkinematicpositioningaswellasawiderangeofnavigationapplicationsworldwidethroughoutthenextdecade.©RTCM–NotforreproductionorredistributioniiThispageintentionallyleftblank.©RTCM–NotforreproductionorredistributionRTCM10403.1iiiTABLEOFCONTENTS1INTRODUCTIONANDSCOPE......................................................................................1-11.1Introduction................................................................................................................1-11.2Scope............................................................................................................................1-22APPLICATIONLAYER.........................................................................................