RTCMDataFormat

(RadioTechnicalCommissionforMaritimeServices)

RINEXRawGPSstaticdataformatfordataprocessingandarchiveNMEAStandardrelatedtodatacommunicationbetweenmarineelectronicdevices.TransmissionofGPSpositionfromGPSreceivertootherdevices(e.g.GPSreceivertoPDA)ForrealtimepositioningRTCMSC-104TransmissionofGPScorrectionfromGPSreferencestationtoGPSRoverForDGPS/RTKsurveysOverviewofCommonGPSDataFormat

OutlineExampleofusingRTCMDataFormatAboutRTCMRTCMDataStructureRTCMMessageTypesRTCMusinginSatRefSatRefSystemDGPSSingle-RTKNetwork-RTKAllGPScorrectionsfromSatRefareinRTCM-2.1dataformat.

AboutRTCMRadioTechnicalCommission

forMaritimeServicesVariousSpecialCommitteessetthestandardsforInternationalmaritimeradionavigationandradiocommunicationExamples:GPSApplicationsElectronicCharts…..WhatisRTCMSC-104?RTCMSpecialCommittee(SC)104istheoneconcernedGPScorrectionsignal.RTCMdataformatrelatedtoGPScorrectionsiscalledRTCMSC-104dataformat.Compactbinarydatagoodforreal-timeprocessingWhatisRTCMSC-104?Differentversions

RTCM-2.0(Codecorrection->DGPS)RTCM-2.1(Code+Phasecorrection->RTK)RTCM2.2(…+GLONASS)RTCM2.3(….+GPSAntennaDefinition)RTCM3.0(….+NetworkRTK&GNSS)RTCMDataStructure(Versions2.0-2.3)RTCMDataStructureEachdatarecordcontainsseveralmessagetypesforvariouscontents.Message1,Message2….MessageNEachmessagecomprisesheaderandbodyHeader:messagetype,time,lengthofmessage,Body:dataforeverydatatype

RTCMMessageTypes

(Versions2.0-2.3)

RTCMMessageTypesRTCMMessageTypeDescription1DifferentialGPSCorrections2DeltaDifferentialGPSCorrections3GPSReferenceStationParameters4ReferenceStationDatum5GPSConstellationHealth6GPSNullName7DGPSBeaconAlmanac8PseudoliteAlmanac9GPSPartialCorrectionSet10P-CodeDifferentialCorrection11C/ACode,L1,L2DeltaCorrections12PseudoliteStationParameter13GroundTransmitterParameter14GPSTimeofWeek15IonosphericDelayMessageRTCMMessageTypes18-21messagesaddedinRTCM2.123-24messagesaddedinRTCM2.331-36messagesaddedinRTCM2.216GPSSpecialMessage17GPSEphemerides18RTKUncorrectedCarrierPhases19RTKUncorrectedPseudorange20RTKCarrierPhaseCorrections21RTKPseudorangeCorrections22ExtendedReferenceStationParameters23AntennaTypeDefination24ReferenceStation:AntennaReferencePoint(ARP)Parameter25,26Undefined27ExtendedDGPSRadiobeaconAlmanac28…30Undefined31DifferentialGLONASSCorrections32DifferentialGLONASSReferenceStation33GLONASSConstellationHealth34GLONASSPartialDifferentialCorrectionSetGLONASSNullName(N<=1)RTCMMessageTypes31-36messagesaddedinRTCM2.235GLONASSRadiobeaconAlmanac36GLONASSSpecialMessage37GNSSSystemTimeOffset38..58Undefined59ProprietaryMessage60..63MultipurposeUsageRTCMRawDataBinarydataRTCMMessageType11.PseudorangeCorr.2.RangeRateCorr.RTCMMessageType3+22RTCMMessageType20RTCMMessageType21RTCMversion3.0RTCM3.0NewdatastructuredevelopedfornetworkRTKapplications.

newsignalsL2CandL5GNSSsystemdataCompactDataStructureRTCM2.0–0.5kbit/sec.(DGPS)RTCM2.1-2.3requires5kbit/sec(DGPS+RTK)RTCM3.0.requires2kbit/secRTCMversion3.0FourGroupsofRTCM3.0GNSSRTKmessages(RTCM2023)GroupNameMessageTypeMessageDescriptionObservations1001L1-onlyGPSRTKObservables1002ExtendedL1-OnlyGPSRTKObservables1003L1&L2GPSRTKObservables1004ExtendedL1&L2GPSRTKObservables1005L1OnlyGLONASSRTKObservables1006ExtendedL1-OnlyGLONASSRTKObservables1007L1&L2GLONASSRTKObservables1008ExtendedL1&L2GPSRTKObservablesStationCoordinates1009StationaryRTKReferenceStationARP1010StationaryRTKReferenceARPwithAntennaHeightAntennaDescription1011AntennaDescriptor1012AntennaDescriptor&SerialNumberAuxiliaryOperationInformation1013Sys