Use gps for clock correction
koenig at tat.physik.uni-tuebingen.de
Fri Aug 15 14:41:57 CEST 2008
On Aug 14, Russell Sears wrote:
> > GPS would be perfect for updating time, cause the time sent is more
> > exact then the times, you can get by any other way. What about ntpd, can
> > it handle gps-data?
ntp has full gps/nmea support, even with PPS:
> Does the FR have access to the PPS signal from the GPS chip? That might
if not, please add that feature request for GTA03++ !
is there a chance to solder a wire from ublox to some free digital input line
which can trigger an interrupt (serial handshake line or similar) for gta02 ?
having PPS would be really nice...
> I wonder how hard it would be to add GSM time broadcast support to NTP...
I've been told that time quality of GSM is (or at least has been?) _very_ bad,
(errors from seconds to minutes, at least on germany) ?!?
not exactly what you'd expect as time source for ntp then ;-)
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Harald Koenig // / \\ \
koenig at tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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