File:Leapsecond.ut1-utc.svg

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Description	English: Plot showing the difference UT1−UTC in seconds. Vertical segments correspond to leap seconds. Red part of graph was prediction (future values) at the time the file was made. Česky: Graf zobrazující rozdíl UT1−UTC v sekundách. Svislé úseky odpovídají přestupným sekundám. Červená část je předpověď budoucích hodnot (v okamžiku vytvoření grafu).
Source	self-made with gnuplot using data file “finals.all” available from http://maia.usno.navy.mil/
Date	2009-04-08
Author	commons:User:Tomia, Petr Kadlec
Permission	see below
Other versions	Image:Leapsecond.ut1-utc.png (slightly reworked version that is now out of date at: Image:Leap second history.svg)

Licensing:

I, the author of this work, hereby publish it under the following license: This image is ineligible for copyright and therefore is in the public domain, because it consists entirely of information that is common property and contains no original authorship.

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:

set xdata time
set timefmt "%d/%m/%Y"
set format x "%Y"
set xrange ["01/05/1984":"01/05/2010"]
set yrange [-0.8:0.8]
set grid lt 3 lc 0
unset key
set terminal svg dashed
set output 'Leapsecond.ut1-utc.svg'
plot 'finals-iers.txt' using (sprintf("%02.0f/%02.0f/%04.0f", $3, $2, ($4 <= 51543 ? 1900 + $1 : 2000 + $1))):($6) w l lt 1 lc 2 title 'Measured', 'finals-pred.txt' using (sprintf("%02.0f/%02.0f/%04.0f", $3, $2, ($4 <= 51543 ? 1900 + $1 : 2000 + $1))):($6) w l lt 1 lc 1 title 'Predicted'
set output

This page uses content from Wikipedia. The original article was at File:Leapsecond.ut1-utc.svg. The list of authors can be seen in the page history. The text of this Wikinfo article is available under the GNU Free Documentation License and the Creative Commons Attribution-Share Alike 3.0 license. English | Română | edit

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	14:53, 3 September 2009		600×480 (132 KB)	Anime addict (Talk | contribs)

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