Typical GPS based NTP server appliances sell for hundreds, even thousands of dollars. Most have lots of features that justify that cost, such as an ovenized crystal oscillator (or even a rubidium standard), additional frequency outputs, custom web interface, commercial support, etc. Building your own basic NTP server (like in this article) can be done on the cheap for well under $200, and for all practical purposes gives just as good time over a network.
Read more at EOC.
Building a Stratum-1 GPS Based NTP Server with a Soekris net4501
Posted on Thursday, May 15 2008 @ 7:21 CEST by Thomas De Maesschalck