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
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