On 2015-05-05 11:47, Hal Murray wrote:
[email protected] said:
Surely the receiver is still producing correct frames that identify the
future leapsecond, and those frames could be read, and used to set a little
routine that wakes up at the appropriate second, and adjusts the overall
offset?
Is there any leap-warning info in NMEA mode? I don't remember seeing
anything like that when scanning the documentation and the NMEA driver in
ntpd doesn't have any code like that.
GPS provides only the current UTC offset from GPS time, which could be made
available via a custom vendor message, or derived from the difference between
messages which provide UTC and messages (e.g. $GPZDG) which provide GPS time.
Stratum 1 NTP servers need to be provided with a copy of the NIST leap second
file and will propagate the warning to higher (numeric) stratum clients.
--
Take care. Thanks, Brian Inglis
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