[LEAPSECS] Leap smear

[mike cook]

> That's an argument for eliminating radio time broadcasts :)

should hve been a wink, rather than a smile. I rely on radio on radio 
broadcast time.

>

> Both GPS and VLBI require knowledge of UTC and UT1 for implementation. 

> How does the GPS pick up the UT1 corrections?  VLBI, at least when I 

> was involved with it many years ago, depends on the IERS circular.

>

GPS doesn't transmit DUT1 as far as I can see. It just tells you how to 
get from GPS time to UTC .  Of the radio time broadcasts that are in 
use, I see only CHU, WWV, MSF, RBU (DUT1 +dUT1 in 0,02 second 
precision), RWM giving DUT1 values.