Looks like I may have found an answer to the second issue I was seeing with incorrect date on my third RTCM, and it even might even have something to do with the first problem I mentioned. It looks like the Garmin’s firmware wasn’t coded to rollover during the “GPS Rollover” event on April 26, 2019.
I noted that the Hours/Minutes/Seconds was being read exactly correctly at the same on all three RTCMs’ consoles, but the week and year was obviously off on the third RTCM (953192179 vs the 1572507379 on the other two working properly). Looks like my third one’s firmware couldn’t handle the GPS rollover it but the other two survived).
Per Garmin’s website…
This explains the “GPS rollover”:
https://support.garmin.com/en-US/?faq=aWFo5DwVSv0cCJgWFoUXd9
This explains that the model 18X receiver needs to be updated with new firmware:
https://support.garmin.com/en-PH/?faq=1nhJHx5aJF59JliMGH8A07
I’m sure there are plenty of people out there who are using the 18x that would like to know about this. I’d be happy to contribute a blurb to the wiki.
Any thoughts on this?