71 lines
3.4 KiB
HTML
71 lines
3.4 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta name="GENERATOR" content="Adobe PageMill 3.0 per Windows">
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<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
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<title>PTB Modem Time Service</title>
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<link href="scripts/style.css" type="text/css" rel="stylesheet">
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</head>
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<body>
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<h3>European Automated Computer Time Services</h3>
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<hr>
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<p>Several European countries use the following message data format:</p>
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<p><font size="-1" face="Courier New">Data format<br>
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0000000000111111111122222222223333333333444444444455555555556666666666777777777 7<br>
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0123456789012345678901234567890123456789012345678901234567890123456789012345678 9<br>
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1995-01-23 20:58:51 MEZ 10402303260219950123195849740+40000500 *<br>
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A B C D EF G H IJ K L M N O P Q R S T U V W XY Z<CR><LF><br>
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A year<br>
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B month<br>
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C day<br>
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D hour<br>
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E : normally<br>
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A for DST to ST switch first hour<br>
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B for DST to ST switch second hour if not marked in H<br>
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F minute<br>
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G second<br>
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H timezone<br>
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I day of week<br>
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J week of year<br>
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K day of year<br>
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L month for next ST/DST changes<br>
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M day<br>
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N hour<br>
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O UTC year<br>
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P UTC month<br>
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Q UTC day<br>
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R UTC hour<br>
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S UTC minute<br>
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T modified julian day (MJD)<br>
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U DUT1<br>
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V direction and month if leap second<br>
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W signal delay (assumed/measured)<br>
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X sequence number for additional text line in Y<br>
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Y additional text<br>
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Z on time marker (* - assumed delay / # measured delay)<br>
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<CR>!<LF> ! is second change !<br>
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</font></p>
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<p>This format is an ITU-R Recommendation (ITU-R TF583.4) and is now available from the primary timing centres of the following countries: Austria, Belgium, Germany, Italy, The Netherlands, Poland, Portugal, Romania, Spain, Sweden, Switzerland, Turkey and United Kingdom. Some examples are:</p>
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<ul>
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<li>In Germany by Physikalisch-Technische Bundesanstalt (PTB)'s timecode service. Phone number: +49 5 31 51 20 38.
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<p>For more detail, see <a href="http://www.ptb.de/english/org/4/43/433/disse.html">http://www.ptb.de/english/org/4/43/433/disse.htm</a></p>
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<li>In the UK by National Physical Laboratory (NPL)'s TRUETIME service. Phone number: 0891 516 333
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<p>For more detail, see <a href="http://www.npl.co.uk/npl/ctm/truetime.html">http://www.npl.co.uk/npl/ctm/truetime.html</a></p>
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<li>In Italy by Istituto Elettrotecnico Nazionale "Galileo Ferrais" (IEN)'s CTD service. Phone number: 166 11 46 15
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<p>For more detail, see <a href="http://www.ien.it/tf/time/Pagina42.html">http://www.ien.it/tf/time/Pagina42.html</a></p>
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<li>In Switzerland by Swiss Federal Office of Metrology's timecode service. Phone number: 031 323 32 25
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<p>For more detail, see <a href="http://www.metas.ch/en/labors/official-time/modem/index.html">http://www.ofmet.admin.ch/de/labors/4/Zeitvert.html </a></p>
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<li>In Sweden by SP Swedish National Testing and Research Institute 's timecode service. Phone number: +46 33 415783.
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<p>For more detail, see <a href="http://www.sp.se/metrology/timefreq/eng/tandf.htm">http://www.sp.se/metrology/timefreq/eng/tandf.htm</a></p>
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</ul>
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<dl></dl>
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<h4>Additional Information</h4>
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<p><a href="../refclock.html">Reference Clock Drivers</a></p>
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<hr>
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<script type="text/javascript" language="javascript" src="scripts/footer.txt"></script>
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</body>
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</html>
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