Original file(SVG file, nominally 600 × 480 pixels, file size: 231 KB)

Description
English: Plot showing the difference UT1UTC in seconds. Vertical segments correspond to leap seconds. Red part of graph was prediction (future values) at the time the file was made.
Čeština: Graf zobrazující rozdíl UT1UTC v sekundách. Svislé úseky odpovídají přestupným sekundám. Červená část je předpověď budoucích hodnot (v okamžiku vytvoření grafu).
Date
Source Own work using: http://maia.usno.navy.mil/ser7/finals.all
Author Tomia (talk · contribs)
Petr Kadlec (talk · contribs)
Gordon P. Hemsley (talk · contribs)
RP88 (talk · contribs)
Permission
(Reusing this file)
PD-icon.svg This file is ineligible for copyright and therefore in the public domain because it consists entirely of information that is common property and contains no original authorship.
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

Other versions
SVG development
Gnuplot val.svg
This plot was created with Gnuplot.

Source code

Generated using the following scripts:

wget http://maia.usno.navy.mil/ser7/finals.all

cut -c 1-2,3-4,5-6,8-15,58,59-68 --output-delimiter " " finals.all > finals-cut.txt
grep "P" finals-cut.txt > finals-pred.txt
grep "I" finals-cut.txt > finals-iers.txt

gnuplot leapsecs.gnuplot

leapsecs.gnuplot contains commands for gnuplot 5.0:

set xdata time
set timefmt "%Y-%m-%d"
set format x "%Y"
set xrange ["1973-01-01":"2020-01-01"]
set yrange [-0.9:0.9]
set grid lt 3 lc 0
set terminal svg font "Arial,16"
set style line 1 lc rgb 'dark-green' lt 1
set style line 2 lc rgb 'red' lt 1
unset key
makedate(y,m,d,j) = sprintf("%04d-%02d-%02d", (j <= 51543 ? 1900 + y : 2000 + y), m, d)
set output 'Leapsecond.ut1-utc.svg'
plot \
    'finals-iers.txt' \
        using (makedate($1,$2,$3,$4)):($6) \
        with lines linestyle 1 title 'Measured', \
    'finals-pred.txt' \
        using (makedate($1,$2,$3,$4)):($6) \
        with lines linestyle 2 title 'Predicted'
set output

Captions

Plot showing the difference UT1−UTC in seconds

Items portrayed in this file

no value

File history

Click on a date/time to view the file as it appeared at that time.

(newest | oldest) View (newer 10 | ) (10 | 20 | 50 | 100 | 250 | 500)
Date/TimeThumbnailDimensionsUserComment
current10:46, 23 January 2019Thumbnail for version as of 10:46, 23 January 2019600 × 480 (231 KB)Mormegilupdated to current data
07:47, 13 August 2018Thumbnail for version as of 07:47, 13 August 2018600 × 480 (229 KB)Mormegilupdated to current data
21:34, 5 January 2017Thumbnail for version as of 21:34, 5 January 2017600 × 480 (221 KB)RP88Updated to use data available as of 2017-01-05, post leap second.
13:00, 1 December 2016Thumbnail for version as of 13:00, 1 December 2016600 × 480 (220 KB)Mormegilupdated data, expanded to 2018-01-01
13:58, 9 February 2016Thumbnail for version as of 13:58, 9 February 2016600 × 480 (212 KB)Mormegilupdated to current data, displayed data expanded to 2017-01-01
00:10, 2 July 2015Thumbnail for version as of 00:10, 2 July 2015600 × 480 (213 KB)RP88Updated to use data available as of 2015-07-01, post leap second. Updated to use gunplot 5.0.
12:13, 15 April 2015Thumbnail for version as of 12:13, 15 April 2015600 × 480 (210 KB)GPHemsleyAppropriately generate graph using date range 1973-01-01 to 2015-06-30.
11:04, 15 April 2015Thumbnail for version as of 11:04, 15 April 2015600 × 480 (210 KB)GPHemsleyUpdated to use data available as of 2015-04-15 06:59:35-04:00. Increased range of x-axis to show all available data. Increased range of y-axis to match possible value range of −0.9 s < DUT1 < +0.9 s.
15:07, 6 January 2015Thumbnail for version as of 15:07, 6 January 2015600 × 480 (149 KB)Mormegilupdated to current data (with a small manual tweak to “predict” the leap second to be inserted in June)
00:59, 4 January 2014Thumbnail for version as of 00:59, 4 January 2014600 × 480 (151 KB)Rumaroderupdated to current data
(newest | oldest) View (newer 10 | ) (10 | 20 | 50 | 100 | 250 | 500)

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