[LEAPSECS] Bulletin C and all that

Mon Jan 26 07:23:56 EST 2015

Le 26.01.2015 07:00, Rob Seaman a écrit :

< snip >

Have also started experimenting with DUT1 encoding, which is some 
amalgam of the other three bulletins (predictions versus retroactive 
computations versus severely rounded values on uneven calendar 
gridding). At any rate the 5 decimal places from Bulletin A fit neatly 
into a 20-bit int as at the bottom. The idea would be to index into the 
entries via the explicit YYYYMM in the name. One might imagine 
interpolating (linear, spline, whatever) between dates.

   Why stick at MM values? IERS give us DD predictions on a weekly basis.

   Great work Rob. I don't think interpolating is a good idea as IERS 
might do better than a weekly distribution in the future. IMHO this is 
more important than having leap second data distributed via DNS as it 
would mean that we could easily create a UT1 driver for NTP and go to 
UT1 for a legal time distribution service which wouldn't need fiddling 
with in the future.

Rob
--

  bulletin-c.leapsec.com -> 250.10.36.152 -> OK 2015 7 36 1 (1, 0)
  latest.leapsec.com -> 250.10.36.152 -> OK 2015 7 36 1 (1, 0)
  previous.leapsec.com -> 249.230.35.254 -> OK 2012 7 35 1 (1, 0)
  first.leapsec.com -> 248.6.11.133 -> OK 1972 7 11 1 (1, 0)
  origin.leapsec.com -> 248.0.10.245 -> OK 1972 1 10 1 (1, 0)

  leap0.leapsec.com -> 248.0.10.245 -> OK 1972 1 10 1 (1, 0)
  leap1.leapsec.com -> 248.6.11.133 -> OK 1972 7 11 1 (1, 0)
  leap2.leapsec.com -> 248.12.12.208 -> OK 1973 1 12 1 (1, 0)
  leap3.leapsec.com -> 248.24.13.158 -> OK 1974 1 13 1 (1, 0)
  leap4.leapsec.com -> 248.36.14.76 -> OK 1975 1 14 1 (1, 0)
  leap5.leapsec.com -> 248.48.15.2 -> OK 1976 1 15 1 (1, 0)
  leap6.leapsec.com -> 248.60.16.129 -> OK 1977 1 16 1 (1, 0)
  leap7.leapsec.com -> 248.72.17.6 -> OK 1978 1 17 1 (1, 0)
  leap8.leapsec.com -> 248.84.18.147 -> OK 1979 1 18 1 (1, 0)
  leap9.leapsec.com -> 248.96.19.154 -> OK 1980 1 19 1 (1, 0)
  leap10.leapsec.com -> 248.114.20.85 -> OK 1981 7 20 1 (1, 0)
  leap11.leapsec.com -> 248.126.21.129 -> OK 1982 7 21 1 (1, 0)
  leap12.leapsec.com -> 248.138.22.40 -> OK 1983 7 22 1 (1, 0)
  leap13.leapsec.com -> 248.162.23.128 -> OK 1985 7 23 1 (1, 0)
  leap14.leapsec.com -> 248.192.24.127 -> OK 1988 1 24 1 (1, 0)
  leap15.leapsec.com -> 248.216.25.124 -> OK 1990 1 25 1 (1, 0)
  leap16.leapsec.com -> 248.228.26.174 -> OK 1991 1 26 1 (1, 0)
  leap17.leapsec.com -> 248.246.27.9 -> OK 1992 7 27 1 (1, 0)
  leap18.leapsec.com -> 249.2.28.21 -> OK 1993 7 28 1 (1, 0)
  leap19.leapsec.com -> 249.14.29.193 -> OK 1994 7 29 1 (1, 0)
  leap20.leapsec.com -> 249.32.30.45 -> OK 1996 1 30 1 (1, 0)
  leap21.leapsec.com -> 249.50.31.138 -> OK 1997 7 31 1 (1, 0)
  leap22.leapsec.com -> 249.68.32.220 -> OK 1999 1 32 1 (1, 0)
  leap23.leapsec.com -> 249.152.33.233 -> OK 2006 1 33 1 (1, 0)
  leap24.leapsec.com -> 249.188.34.161 -> OK 2009 1 34 1 (1, 0)
  leap25.leapsec.com -> 249.230.35.254 -> OK 2012 7 35 1 (1, 0)
  leap26.leapsec.com -> 250.10.36.152 -> OK 2015 7 36 1 (1, 0)
  leap27.leapsec.com -> 92.242.140.2 -> CLASS ERR

  dut1.201501.leapsec.com -> 240.210.218.53 -> -46022 -> -0.460220 
seconds
  dut1.201502.leapsec.com -> 240.198.80.149 -> -49232 -> -0.492320 
seconds
  dut1.201503.leapsec.com -> 240.184.18.42 -> -52878 -> -0.528780 seconds
  dut1.201504.leapsec.com -> 240.166.142.108 -> -57362 -> -0.573620 
seconds
  dut1.201505.leapsec.com -> 240.150.39.208 -> -61561 -> -0.615610 
seconds
  dut1.201506.leapsec.com -> 240.137.158.247 -> -64770 -> -0.647700 
seconds
  dut1.201507.leapsec.com -> 242.10.187.39 -> 33819 -> 0.338190 seconds
  dut1.201508.leapsec.com -> 242.9.149.181 -> 33525 -> 0.335250 seconds
  dut1.201509.leapsec.com -> 242.2.114.186 -> 31698 -> 0.316980 seconds
  dut1.201510.leapsec.com -> 241.245.33.186 -> 28289 -> 0.282890 seconds
  dut1.201511.leapsec.com -> 241.227.208.63 -> 23856 -> 0.238560 seconds
  dut1.201512.leapsec.com -> 241.213.32.100 -> 20096 -> 0.200960 seconds
  dut1.201601.leapsec.com -> 241.201.93.90 -> 17085 -> 0.170850 seconds

_______________________________________________
LEAPSECS mailing list
LEAPSECS at leapsecond.com
https://pairlist6.pair.net/mailman/listinfo/leapsecs [1]

Links:
------
[1] https://pairlist6.pair.net/mailman/listinfo/leapsecs