On Mon, 16 Mar 2009 19:14:33 -0400, Bob Rutledge wrote:
>Paul Gilmartin wrote:
>...
>> In RFC 1305 (March 1992) I read:
>>
>> Note that not all transmission formats used by NIST radio
>> broadcast services [NBS79] and no currently available radio
>> clocks include provisions for year information and
>> leap-second warning. This information must be determined
>> from other sources.
>>
>> Ugh. Perhaps it's better now.
>
>http://tf.nist.gov/timefreq/stations/wwvtimecode.htm
>http://tf.nist.gov/timefreq/stations/wwvbtimecode.htm
>
It did say "not all", not "none".
Thanks for the reference. Nearby on the site, I find
the explanation:
A leap second warning is indicated on the WWV/VH time code at
bit 3. If a one is present on bit three, a leap second will be
added to UTC at the end of the current month
Hmmm. No provision for a negative leap second. I guess
we hope that never happens. The data definitions in
RFC 1305 allow for negative leap seconds.
-- gil
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html
