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<h3>European Automated Computer Time Services</h3>
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<p>Several European countries use the following message data format:</p>
<p><font size="-1" face="Courier New">Data format<br>
0000000000111111111122222222223333333333444444444455555555556666666666777777777 7<br>
0123456789012345678901234567890123456789012345678901234567890123456789012345678 9<br>
1995-01-23 20:58:51 MEZ 10402303260219950123195849740+40000500 *<br>
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>
A year<br>
B month<br>
C day<br>
D hour<br>
E : normally<br>
A for DST to ST switch first hour<br>
B for DST to ST switch second hour if not marked in H<br>
F minute<br>
G second<br>
H timezone<br>
I day of week<br>
J week of year<br>
K day of year<br>
L month for next ST/DST changes<br>
M day<br>
N hour<br>
O UTC year<br>
P UTC month<br>
Q UTC day<br>
R UTC hour<br>
S UTC minute<br>
T modified julian day (MJD)<br>
U DUT1<br>
V direction and month if leap second<br>
W signal delay (assumed/measured)<br>
X sequence number for additional text line in Y<br>
Y additional text<br>
Z on time marker (* - assumed delay / # measured delay)<br>
<CR>!<LF> ! is second change !<br>
</font></p>
<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>
<ul>
<li>In Germany by Physikalisch-Technische Bundesanstalt (PTB)'s timecode service. Phone number: +49 5 31 51 20 38.
<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>
<li>In the UK by National Physical Laboratory (NPL)'s TRUETIME service. Phone number: 0891 516 333
<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>
<li>In Italy by Istituto Elettrotecnico Nazionale "Galileo Ferrais" (IEN)'s CTD service. Phone number: 166 11 46 15
<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>
<li>In Switzerland by Swiss Federal Office of Metrology's timecode service. Phone number: 031 323 32 25
<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>
<li>In Sweden by SP Swedish National Testing and Research Institute 's timecode service. Phone number: +46 33 415783.
<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>
</ul>
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<h4>Additional Information</h4>
<p><a href="../refclock.html">Reference Clock Drivers</a></p>
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