1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2 3<html> 4 5 <head> 6 <meta name="GENERATOR" content="Adobe PageMill 3.0 per Windows"> 7 <meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> 8 <title>PTB Modem Time Service</title> 9 <link href="scripts/style.css" type="text/css" rel="stylesheet"> 10 </head> 11 12 <body> 13 <h3>European Automated Computer Time Services</h3> 14<p>Last update: 15 <!-- #BeginDate format:En2m -->21-Oct-2010 23:44<!-- #EndDate --> 16 UTC</p> 17 <hr> 18 <p>Several European countries use the following message data format:</p> 19 <p><font size="-1" face="Courier New">Data format<br> 20 0000000000111111111122222222223333333333444444444455555555556666666666777777777 7<br> 21 0123456789012345678901234567890123456789012345678901234567890123456789012345678 9<br> 22 1995-01-23 20:58:51 MEZ 10402303260219950123195849740+40000500 *<br> 23 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> 24 A year<br> 25 B month<br> 26 C day<br> 27 D hour<br> 28 E : normally<br> 29 A for DST to ST switch first hour<br> 30 B for DST to ST switch second hour if not marked in H<br> 31 F minute<br> 32 G second<br> 33 H timezone<br> 34 I day of week<br> 35 J week of year<br> 36 K day of year<br> 37 L month for next ST/DST changes<br> 38 M day<br> 39 N hour<br> 40 O UTC year<br> 41 P UTC month<br> 42 Q UTC day<br> 43 R UTC hour<br> 44 S UTC minute<br> 45 T modified julian day (MJD)<br> 46 U DUT1<br> 47 V direction and month if leap second<br> 48 W signal delay (assumed/measured)<br> 49 X sequence number for additional text line in Y<br> 50 Y additional text<br> 51 Z on time marker (* - assumed delay / # measured delay)<br> 52 <CR>!<LF> ! is second change !<br> 53 </font></p> 54 <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> 55 <ul> 56 <li>In Germany by Physikalisch-Technische Bundesanstalt (PTB)'s timecode service. Phone number: +49 5 31 51 20 38. 57 <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> 58 <li>In the UK by National Physical Laboratory (NPL)'s TRUETIME service. Phone number: 0891 516 333 59 <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> 60 <li>In Italy by Istituto Elettrotecnico Nazionale "Galileo Ferrais" (IEN)'s CTD service. Phone number: 166 11 46 15 61 <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> 62 <li>In Switzerland by Swiss Federal Office of Metrology's timecode service. Phone number: 031 323 32 25 63 <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> 64 <li>In Sweden by SP Swedish National Testing and Research Institute 's timecode service. Phone number: +46 33 415783. 65 <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> 66 </ul> 67 <dl></dl> 68 <h4>Additional Information</h4> 69 <p><a href="../refclock.html">Reference Clock Drivers</a></p> 70 <hr> 71 <script type="text/javascript" language="javascript" src="scripts/footer.txt"></script> 72 </body> 73 74</html> 75