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Re: [gpsd-dev] GPSD's assumptions about time
From: |
Hal Murray |
Subject: |
Re: [gpsd-dev] GPSD's assumptions about time |
Date: |
Tue, 26 Nov 2013 14:49:29 -0800 |
>> There was some discussion in the ntp lists a month or two ago about a NMEA
>> device that was broken and going to need this logic. One of them might
make
>> a handy test case. I'll try to track down the details if you are
interested.
> I am.
It started on the time-nuts list:
[time-nuts] Warped back to 1993
http://www.febo.com/pipermail/time-nuts/2013-August/079197.html
The time-nuts archive stuff often breaks threads into several chunks. If you
want the whole thing, go back to the Thread index when you get to the end.
Look down a bit to pick up the next chunk.
Then it went over to ntp-questions:
[ntp:questions] Start of new GPS 1024 week epoch
http://lists.ntp.org/pipermail/questions/2013-August/035889.html
Lots of noise here. It's a long thread.
The problem has been observed in
FURUNO GT-74, GT-77, and GT-80
Truetime XL-DC (some, not all)
Furuno had a web page:
http://www.furuno.co.jp/en/news/notice/20130214_001.html
Somewhere in there I saw a comment about using the leap second offset to get
the right epoch. Sounds like a neat hack. That would give you 20 years from
the time you built the leap-second table.
--
These are my opinions. I hate spam.
Re: [gpsd-dev] GPSD's assumptions about time, Hal Murray, 2013/11/28