Author Topic: Test data sought for msg 1-3 "communication state"  (Read 2753 times)


  • Seaman
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Test data sought for msg 1-3 "communication state"
« on: 04 January, 2015, 11:55:37 am »
I am going to extend my Java based decoder ( so that it can decode the "Communication State" field in message types 1, 2, and 3 as defined in ITU-R M.1371-5,  Annex 2, ยง, p. 46ff.

This is rather complex, as it involves a number of new sub-message types to represent  "received stations", "slot number", "UTC hour and minute" and "slot offset" in addition to the common "sync state" and "slot time-out" fields.

Does anyone have any validated pairs of NMEA-strings and decoded values, that I can use to test new the software against?

Thank you in advance!

« Last Edit: 04 January, 2015, 12:01:45 pm by tbsalling »


  • Ensign
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Re: Test data sought for msg 1-3 "communication state"
« Reply #1 on: 12 January, 2015, 07:26:07 pm »
You can find samples of many of the messages in the test code in gpsd, which also includes an AIS message parser.