[time-nuts] Free programs to read NEMA data.

M. Warner Losh imp at bsdimp.com
Sat Jan 17 20:17:13 EST 2009


In message: <1232236533.26603.8.camel at bg-desktop>
            Björn Gabrielsson <bg at lysator.liu.se> writes:
: Hi Warner,
: 
: On Sat, 2009-01-17 at 16:30 -0700, M. Warner Losh wrote:
: > In message: <ca1.4beaaa2e.36a3c0db at aol.com>
: >             N3IZN at aol.com writes:
: > :  
: > : OK I found my registration for NMEAT. Now that I upgraded my hobby PC I'm  
: > : giving it a work out by running as many applications as I can. I have NMEAT  
: > : running from a Jupiter GPS engine and I have T-Bolt mon going at the same time.  
: > : They are 16 seconds off from each other? I see on Tboltmon there is a field 
: > : for  UTC offset and 15 seconds is entered there. Any ideas?
: > 
: > The current UTC GPS offset is 16, and has been for the last 17 days or
: > so :)
: 
: That is not the view of USNO... 
: 
:    ftp://tycho.usno.navy.mil/pub/gps/leapsecnanu.txt
: 
: nor the Meinberg receiver I take care of.
: 
: $ ntpq -c cv  timehost.lysator.liu.se | grep gps_utc
: 
: gps_utc_correction="current correction 15 sec, last correction on
: cd068600.00000000  Thu, Jan  1 2009  0:00:00.000",
: 
: However I once had a Jupiter receiver where the NMEA output came 1.0xx
: seconds late or 2.0xx seconds late. Btw, the Jupiter/Zodiac binary was
: much better timed.

Doh!  I added two seconds to my internal leap second delta counter.
My bad.

Warner




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