MKlimenko / rinex2rtcm3

RINEX-to-RTCMv3 RTKLIB-based converter

rinex2rtcm3 converter

A small RTKLIB-based tool to convert arbitrary number of RINEX files into single RTCMv3 file.

rinex2rtcm3 [-?|-h|--help] [--interleave] --type <messages type> [--custom <custom types>] --output <output filename> --input <input filenames>

Background

It's not the most obvious and required conversion, however, if one is willing to go deep into testing and verification of GNSS receivers, such a tool might become quite handy. For example, the testing setup might include GNSS signal simulator or the record&playback device, for which the suitable RTCMv3 RTK (base station) or PPP (reference network) data should be recorded and re-broadcasted.

Usage

rinex2rtcm3 is based on RTKLIB for the GNSS-related stuff and Lyra (ex-Clara, my favourite CLI library) for the console argument parsing. Input arguments may be separated into five groups:

1. --help prints the usage info
2. --type selects the pre-defined set of messages:
   1. legacy for 1004, 1012, 1019 and 1020 messages (GPS L1+L2 legacy message, GLONASS L1+L2 legacy message, GPS ephemeris, GLONASS ephemeris)
   2. compact_msm for MSM4 (1074, 1084 etc), 1019, 1020, 1041, 1042, 1044, 1045 and 1046 messages (GPS/GLONASS/Galileo/BeiDou/NavIC/QZSS/SBAS MSM4 and ephemeris)
   3. full_msm for MSM7 (1077, 1087 etc), 1019, 1020, 1041, 1042, 1044, 1045 and 1046 messages (GPS/GLONASS/Galileo/BeiDou/NavIC/QZSS/SBAS MSM7 and ephemeris)
   4. custom_set for the messages, provided by the --custom subcommand
3. --custom adds one message type for conversion. For multiple argument this command should be repeated N times
4. --output selects the file of the destination RTCMv3 data file
5. --input selects one file as an input. For multiple file this argument should be repeated N times.
6. --interleave forces the stream to interleave ephemeris and observable messages. Every epoch the most recent ephemeris would be repeated.

Future work

• Verify build on several platforms
• Add tests (WIP)
• Add CI
• Make the file more stream-friendly for long files (interleave ephemeris and observables)
• Tune the CLI