Decoder/encoder for all RTCM 3 message types up to RTCM 3.3 Amendment 1 (c10403.3).

npm install -S @gnss/rtcm

let buffer: Buffer = ...; // Raw bytes of message to be decoded
let message: RtcmMessage; // Decoded message
let length: number; // Length of decoded message in bytes
[message, length] = RtcmTransport.decode(buffer);
// ...
buffer = buffer.slice(length); // Move to next message

let message = ...; // Message to be encoded
let buffer: Buffer = Buffer.allocUnsafe(RtcmTransport.MAX_PACKET_SIZE);
let length: number; // Length of encoded message in bytes
length = RtcmTransport.encode(message, buffer);
// ...
buffer = buffer.slice(0, length); // Encoded message

Messages can be manually constructed using RtcmMessage???.construct({}), which requires all message properties to be provided.

RtcmMessagePhysicalReferenceStationPosition.construct({
    nonPhysicalReferenceStationId: 1,
    physicalReferenceStationId: 0,
    itrfEpochYear: 0,
    arpEcefX: 37927650000,
    arpEcefY: -4160650000,
    arpEcefZ: 50938770000
})

Transform streams to convert from RtcmMessages to raw bytes and vice-versa.

let input: stream.Readable = ...;
let output: stream.Writable = ...;
input                                      // Stream of raw data
    .pipe(new RtcmDecodeTransformStream()) // Stream of RtcmMessage objects
    .pipe(new RtcmEncodeTransformStream()) // Stream of (identical) raw data
    .pipe(output);

RtcmDecodeTransformStream can optionally synchronize with the raw data stream e.g. if it starts receiving data from the middle of a message.

• MT1001 (RtcmMessageGpsL1Observables)
• MT1002 (RtcmMessageGpsL1ObservablesExtended)
• MT1003 (RtcmMessageGpsL1L2Observables)
• MT1004 (RtcmMessageGpsL1L2ObservablesExtended)
• MT1005 (RtcmMessageStationaryArp)
• MT1006 (RtcmMessageStationaryArpHeight)
• MT1007 (RtcmMessageAntennaDescriptor)
• MT1008 (RtcmMessageAntennaDescriptorSerial)
• MT1009 (RtcmMessageGlonassL1Observables)
• MT1010 (RtcmMessageGlonassL1ObservablesExtended)
• MT1011 (RtcmMessageGlonassL1L2Observables)
• MT1012 (RtcmMessageGlonassL1L2ObservablesExtended)
• MT1013 (RtcmMessageAuxiliaryOperationInformation)
• MT1014 (RtcmMessageNetworkAuxiliaryStationData)
• MT1015 (RtcmMessageGpsIonosphericCorrectionDifferences)
• MT1016 (RtcmMessageGpsGeometricCorrectionDifferences)
• MT1017 (RtcmMessageGpsCombinedCorrectionDifferences)
• MT1019 (RtcmMessageGpsSatelliteEphemeris)
• MT1020 (RtcmMessageGlonassSatelliteEphemerisData)
• MT1021 (RtcmMessageHelmertAbridgedMolodenskiTransformationParameters)
• MT1022 (RtcmMessageMolodenskiBadekasTransformationParameters)
• MT1023 (RtcmMessageResidualsEllipsoidalGridRepresentation)
• MT1024 (RtcmMessageResidualsPlaneGridRepresentation)
• MT1025 (RtcmMessageProjectionParametersExceptLcc2spOm)
• MT1026 (RtcmMessageProjectionParametersLcc2sp)
• MT1027 (RtcmMessageProjectionParametersOm)
• MT1029 (RtcmMessageUnicodeTextString)
• MT1030 (RtcmMessageGpsNetworkRtkResidual)
• MT1031 (RtcmMessageGlonassNetworkRtkResidual)
• MT1032 (RtcmMessagePhysicalReferenceStationPosition)
• MT1033 (RtcmMessageReceiverAntennaDescriptor)
• MT1034 (RtcmMessageGpsNetworkFkpGradient)
• MT1035 (RtcmMessageGlonassNetworkFkpGradient)
• MT1037 (RtcmMessageGlonassIonosphericCorrectionDifferences)
• MT1038 (RtcmMessageGlonassGeometricCorrectionDifferences)
• MT1039 (RtcmMessageGlonassCombinedCorrectionDifferences)
• MT1041 (RtcmMessageIrnssSatelliteEphemerisData)
• MT1042 (RtcmMessageBdsSatelliteEphemerisData)
• MT1044 (RtcmMessageQzssSatelliteEphemerisData)
• MT1045 (RtcmMessageGalileoFNavSatelliteEphemerisData)
• MT1046 (RtcmMessageGalileoINavSatelliteEphemerisData)
• MT1057 (RtcmMessageSsrGpsOrbitCorrection)
• MT1058 (RtcmMessageSsrGpsClockCorrection)
• MT1059 (RtcmMessageSsrGpsCodeBias)
• MT1060 (RtcmMessageSsrGpsCombinedCorrection)
• MT1061 (RtcmMessageSsrGpsUra)
• MT1062 (RtcmMessageSsrGpsHighRateClockCorrection)
• MT1063 (RtcmMessageSsrGlonassOrbitCorrection)
• MT1064 (RtcmMessageSsrGlonassClockCorrection)
• MT1065 (RtcmMessageSsrGlonassCodeBias)
• MT1066 (RtcmMessageSsrGlonassCombinedCorrection)
• MT1067 (RtcmMessageSsrGlonassUra)
• MT1068 (RtcmMessageSsrGlonassHighRateClockCorrection)
• MT1071 (RtcmMessageMsm1Gps)
• MT1072 (RtcmMessageMsm2Gps)
• MT1073 (RtcmMessageMsm3Gps)
• MT1074 (RtcmMessageMsm4Gps)
• MT1075 (RtcmMessageMsm5Gps)
• MT1076 (RtcmMessageMsm6Gps)
• MT1077 (RtcmMessageMsm7Gps)
• MT1081 (RtcmMessageMsm1Glonass)
• MT1082 (RtcmMessageMsm2Glonass)
• MT1083 (RtcmMessageMsm3Glonass)
• MT1084 (RtcmMessageMsm4Glonass)
• MT1085 (RtcmMessageMsm5Glonass)
• MT1086 (RtcmMessageMsm6Glonass)
• MT1087 (RtcmMessageMsm7Glonass)
• MT1091 (RtcmMessageMsm1Galileo)
• MT1092 (RtcmMessageMsm2Galileo)
• MT1093 (RtcmMessageMsm3Galileo)
• MT1094 (RtcmMessageMsm4Galileo)
• MT1095 (RtcmMessageMsm5Galileo)
• MT1096 (RtcmMessageMsm6Galileo)
• MT1097 (RtcmMessageMsm7Galileo)
• MT1101 (RtcmMessageMsm1Sbas)
• MT1102 (RtcmMessageMsm2Sbas)
• MT1103 (RtcmMessageMsm3Sbas)
• MT1104 (RtcmMessageMsm4Sbas)
• MT1105 (RtcmMessageMsm5Sbas)
• MT1106 (RtcmMessageMsm6Sbas)
• MT1107 (RtcmMessageMsm7Sbas)
• MT1111 (RtcmMessageMsm1Qzss)
• MT1112 (RtcmMessageMsm2Qzss)
• MT1113 (RtcmMessageMsm3Qzss)
• MT1114 (RtcmMessageMsm4Qzss)
• MT1115 (RtcmMessageMsm5Qzss)
• MT1116 (RtcmMessageMsm6Qzss)
• MT1117 (RtcmMessageMsm7Qzss)
• MT1121 (RtcmMessageMsm1Bds)
• MT1122 (RtcmMessageMsm2Bds)
• MT1123 (RtcmMessageMsm3Bds)
• MT1124 (RtcmMessageMsm4Bds)
• MT1125 (RtcmMessageMsm5Bds)
• MT1126 (RtcmMessageMsm6Bds)
• MT1127 (RtcmMessageMsm7Bds)
• MT1131 (RtcmMessageMsm1Irnss)
• MT1132 (RtcmMessageMsm2Irnss)
• MT1133 (RtcmMessageMsm3Irnss)
• MT1134 (RtcmMessageMsm4Irnss)
• MT1135 (RtcmMessageMsm5Irnss)
• MT1136 (RtcmMessageMsm6Irnss)
• MT1137 (RtcmMessageMsm7Irnss)
• MT1230 (RtcmMessageGlonassL1L2CodePhaseBiases)

npm test

GPLv3

Contributions of new message types, bug fixes and general improvements via pull requests are welcome. Please ensure that code style matches that of the existing files.