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Newer page: version 16 Last edited on Friday, February 1, 2013 1:43:00 am by SamBailey Revert
Older page: version 15 Last edited on Thursday, December 27, 2012 3:48:49 pm by AristotlePagaltzis Revert
@@ -1,39 +1,67 @@
-!!! [ NTP] Servers 
+!!! NTP Servers in New Zealand  
  
-!! In NewZealand  
+There is a pool of servers at <tt>nz.pool.ntp.org</tt>, which provides [Round Robin DNS|RoundRobin] access to publicly accessible [NTP] servers that have agreed to be part of the pool.  
  
-There is a pool of servers at <tt>nz.pool.ntp.org</tt>, which provides RoundRobin [DNS] access to publicly accessible [NTP] servers that have agreed to be part of the pool.  
-  
- Many [ISP]s have [ NTP] servers for their customers: 
+Many ISPs have NTP servers for their customers: 
  
 * <tt>ntp.iprolink.co.nz</tt> 
 * <tt>ntp.iconz.co.nz</tt> 
 * <tt>tk1.ihug.co.nz to tk3.ihug.co.nz</tt> 
 * <tt>time.paradise.net.nz</tt> 
-  
-or you could try querying your [ISP]'s [DNS] servers with <tt>ntp</tt> or <tt>ntp1</tt>.  
  
 Some universities have publicly accessible servers: 
  
 * <tt>ntp.public.otago.ac.nz</tt> (Please notify before using) 
 * <tt>ntp.massey.ac.nz</tt> 
  
-For a long time WaikatoUniversity had public [ NTP] servers. They are still available but no longer publicly accessible. 
+For a long time [Waikato University| WaikatoUniversity] had public NTP servers. They are still available but no longer publicly accessible.  
+  
+!! Stratum 1 Servers in New Zealand  
+  
+You shouldn't synchronise to a stratum one server for your small network -- if everyone did that then the server would need too much bandwidth. The difference in accuracy between synching to a stratum 1 server and a lower stratum server is negligible! [more|http://list.waikato.ac.nz/pipermail/nznog/2001-October/003705.html]  
+  
+! .nz Registry Services  
+  
+There are three stratum 1 NTP servers provided by .nz Registry Services (NZRS) for network operators based within New Zealand. [more|http://ntp.net.nz/]  
+  
+* <tt>s1.ntp.net.nz</tt> in Albany connected to [FX].  
+* <tt>s2.ntp.net.nz</tt> in Auckland connected to [ICONZ] and [APE].  
+* <tt>s3.ntp.net.nz</tt> in Wellington connected to [FX] and [WIX].  
+  
+All three are Symmetricom S300 NTP servers, each connected to a differential GPS antenna on the roof and each with a rubidium oscillator to provide a stable clock in the event of an issue with the GPS signal. [more|http://ntp.net.nz/architecture/]  
+  
+! The Measurement Standards Laboratory  
+  
+The standard for time in New Zealand is maintained by the [Measurement Standards Laboratory|http://msl.irl.cri.nz/], part of [Industrial Research Limited|http://irl.cri.nz/]. MSL runs several public NTP servers that are referenced to UTC(MSL).  
+  
+* <tt>msltime.irl.cri.nz</tt>  
+* <tt>msltime1.irl.cri.nz</tt>  
+* <tt>msltime2.irl.cri.nz</tt>  
+  
+They are FreeBSD-based servers that are directly connected to their master HP5071A caesium clock. [more|http://msl.irl.cri.nz/services/time-and-frequency/ntp-server-information]  
+  
+!! Stratum 1 Servers in other countries  
+  
+! United States  
+  
+The US National Institute of Standards and Technology (NIST) operates several publicly accessable stratum 1 time servers on the pacific coast of the US. These servers are referenced to UTC(NIST) using the NIST Automated Computer Time Service (ACTS), a modem-based service established in 1988. [more|http://tf.nist.gov/tf-cgi/servers.cgi]  
+  
+* <tt>nist1.symmetricom.com</tt> San Jose, California  
+* <tt>nist1-sj.ustiming.org</tt> San Jose, California  
+* <tt>nist1-la.ustiming.org</tt> Los Angeles, California  
+* <tt>nist1.aol-ca.symmetricom.com</tt> Mountain View, California  
  
-!! In other countries  
+The US Naval Observatory (USNO) operates several stratum 1 time servers from it's Alternate Master Clock Facility (AMCF) at [Schriever Air Force Base|http://en.wikipedia.org/wiki/Schriever_Air_Force_Base], [near Colorado Springs|http://maps.google.com/maps?q=schriever+afb], on the same site as the GPS Master Control Station. These servers are referenced to UTC(USNO). [more|http://tycho.usno.navy.mil/clocks.html]  
  
-<tt>pool .ntp .org </tt> has [NTP] server pools for many countries
+* <tt>tick .usnogps .navy.mil </tt>  
+* <tt>tock .usnogps.navy.mil</tt>  
  
-* <tt>au.pool.ntp.org</tt> Australia  
-* <tt>us.pool.ntp.org</tt> United States  
-* <tt>de.pool.ntp.org</tt> Germany  
-* Etc. Try <tt>''cc''.pool.ntp.org</tt>, where ''cc'' is a country code.  
+! Australia 
  
-[List of public German NTP servers | http://www.hullen .de /helmut /filebox /DCF77/ntpsrvr .html ].  
+The Australian National Measurement Institute (NMI) maintains the Australian time standard, UTC(AUS) using caesium and hydrogen maser standards. NMI maintains a number of NTP servers which are referenced to UTC(AUS). To use these servers, you need to register via email. [more |http://www.measurement .gov.au /Services /Pages /TimeandFrequencyDisseminationService .aspx
  
 !! See also 
  
 * [NTPNotes] 
 * TimeSources 
-* [NTPStratum1Servers]  
- * [Scientific study from 1999 on the topology of the country's main NTP servers | http://www.cosc.canterbury.ac.nz/research/reports/TechReps/1999/tr_9901.pdf ] (note that [GPS] is much more widely available now)  
+* [Scientific study from 1999 on the topology of the country's main NTP servers | http://www.cosc.canterbury.ac.nz/research/reports/TechReps/1999/tr_9901.pdf ]