+* html doc reconciliation with DLM's copy.
(4.2.7p328) 2012/11/30 Released by Harlan Stenn <stenn@ntp.org>
* html doc reconciliation with DLM's copy.
(4.2.7p327) 2012/11/29 Released by Harlan Stenn <stenn@ntp.org>
<img src="pic/alice44.gif" alt="gif" align="left"><a href="http://www.eecis.udel.edu/%7emills/pictures.html">from <i>Alice's Adventures in Wonderland</i>, Lewis Carroll</a>
<p>Our resident cryptographer; now you see him, now you don't.</p>
<p>Last update:
- <!-- #BeginDate format:En2m -->05-Oct-2011 15:25<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:40<!-- #EndDate -->
UTC</p>
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<h4>Related Links</h4>
<h3>Copyright Notice</h3>
<img src="pic/sheepb.jpg" alt="jpg" align="left"> "Clone me," says Dolly sheepishly.
<p>Last update:
- <!-- #BeginDate format:En2m -->04-Aug-2011 1:37<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:42<!-- #EndDate -->
UTC</p>
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</p>
<img src="pic/alice47.gif" alt="gif" align="left"><a href="http://www.eecis.udel.edu/%7emills/pictures.html">from <i>Alice's Adventures in Wonderland</i>, Lewis Carroll</a>
<p>Caterpillar knows all the error codes, which is more than most of us do.</p>
<p>Last update:
- <!-- #BeginDate format:En2m -->04-Oct-2011 21:20<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:40<!-- #EndDate -->
UTC</p>
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<h4>Related Links</h4>
<h3>Undisciplined Local Clock</h3>
<p>Author: David L. Mills (mills@udel.edu)<br>
Last update:
- <!-- #BeginDate format:En2m -->18-Oct-2010 20:51<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:51<!-- #EndDate -->
UTC</p>
<hr>
<h4>Synopsis</h4>
<body>
<h3>Leap Second Processing</h3>
<p>Last update:
- <!-- #BeginDate format:En2m -->31-May-2012 20:56<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:43<!-- #EndDate -->
UTC</p>
<hr>
<p>About every eighteen months the International Earth Rotation Service (IERS) issues a bulletin announcing the insertion of a leap second in the Universal Coordinated Time (UTC) timescale. Ordinarily, this happens at the end of the last day of June or December; but, in principle, it could happen at the end of any month. While these bulletins are available on the Internet at <a href="http://www.iers.org">www.iers.org</a>, advance notice of leap seconds is also available in signals broadcast from national time and frequency stations, in GPS signals and in telephone modem services. Many, but not all, reference clocks recognize these signals and many, but not all, drivers for them can decode the signals and set the leap bits in the timecode accordingly. This means that many, but not all, primary servers can pass on these bits in the NTP packet heard to dependent secondary servers and clients. Secondary servers can pass these bits to their dependents and so on throughout the NTP subnet.</p>
<img src="pic/boom3.gif" alt="gif" align="left"><a href="http://www.eecis.udel.edu/~mills/pictures.html">from <i>Pogo</i>, Walt Kelly</a>
<p>We have three, now looking for more.</p>
<p>Last update:
- <!-- #BeginDate format:En2m -->01-Nov-2011 00:44<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:43<!-- #EndDate -->
UTC</p>
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<h4>Related Links</h4>
<img src="pic/wingdorothy.gif" alt="gif" align="left"><a href="http://www.eecis.udel.edu/~mills/pictures.html">from <i>The Wizard of Oz</i>, L. Frank Baum</a>
<p>You need help from the monkeys.</p>
<p>Last update:
- <!-- #BeginDate format:En2m -->21-Dec-2010 13:51<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:44<!-- #EndDate -->
UTC</p>
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<h4>Related Links</h4>
<img src="pic/rabbit.gif" alt="gif" align="left"><a href="http://www.eecis.udel.edu/~mills/pictures.html">from <i>Alice's Adventures in Wonderland</i>, Lewis Carroll</a>
<p>I told you it was eyeball and wristwatch.</p>
<p>Last update:
- <!-- #BeginDate format:En2m -->04-Sep-2010 1:24<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:45<!-- #EndDate -->
UTC</p>
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<hr>
<img src="pic/bustardfly.gif" alt="gif" align="left"><a href="http://www.eecis.udel.edu/~mills/pictures.html">from <i>Pogo</i>, Walt Kelly</a>
<p>A typical NTP monitoring packet</p>
<p>Last update:
- <!-- #BeginDate format:En2m -->20-May-2011 20:04<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:46<!-- #EndDate -->
UTC</p>
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<h4>More Help</h4>
<img src="pic/alice13.gif" alt="gif" align="left"><a href="http://www.eecis.udel.edu/~mills/pictures.html">from <i>Alice's Adventures in Wonderland</i>, Lewis Carroll</a>
<p>The rabbit knows the way back.</p>
<p>Last update:
- <!-- #BeginDate format:En2m -->04-Sep-2010 14:51<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:47<!-- #EndDate -->
UTC</p>
<br clear="left">
<hr>
</head>
<body>
<p>Last update:
- <!-- #BeginDate format:En2m -->12-Sep-2010 3:54<!-- #EndDate -->
+ <!-- #BeginDate format:En2m -->29-Nov-2012 16:48<!-- #EndDate -->
UTC</p>
<h3>Quick Start</h3>
<img src="pic/panda.gif" alt="gif" align="left">FAX test image for SATNET (1979).
<p>The baby panda was scanned at University College London and used as a FAX test image for a demonstration of the DARPA Atlantic SATNET Program and the first transatlantic Internet connection in 1978. The computing system used for that demonstration was called the <a href="http://www.eecis.udel.edu/%7emills/database/papers/fuzz.ps">Fuzzball</a>. As it happened, this was also the first Internet multimedia presentation and the first to use a predecessor of NTP in regular operation. The image was widely copied and used for testing purpose throughout much of the 1980s.</p>
<p>Last update:
- <!-- #BeginDate format:En1m -->12-sep-10 3:54<!-- #EndDate -->
+ <!-- #BeginDate format:En1m -->29-nov-12 16:48<!-- #EndDate -->
UTC</p>
<h4>Related Links</h4>
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projects / thirdparty / ntp.git / commitdiff
