Tom Van Baak tvb at LeapSecond.com
Tue Mar 3 22:06:58 EST 2015

> GPS can deal with it, even IEEE 1344 and C37.118 time codes can, but I'm 
> not sure if WWVB can. Anyway, I know the German DCF-77 transmitter has 
> no flag defined to announce a negative leap second, so there would be 
> major problems if one had to be inserted.

Both WWVB and DCF-77 have a single leap second warning bit. With WWVB you look at the sign of DUT1 to know if the leap is insert or delete. So WWVB is fine.

DCF-77 has no DUT1 or leap gender bit so, yes, there will be trouble. I'm sure PTB will figure something out if it ever comes to that.


More information about the LEAPSECS mailing list