NTP Server Reference Clocks
- Date: 2007-05-11 - Word Count: 474
Share This!
The Network Time Protocol is the standard Internet protocol for distributing accurate time to network time clients. There are a large number of NTP servers that reside on the Internet and can be freely accessed by any number of clients. However, in many cases it may be essential for organisations to install their own Stratum 1 time server. This article introduces a number of external reference clock time and frequency resources that can be used for synchronising a stratum 1 NTP time server.
Probably the most widely used NTP reference clock resource is currently the Global Positioning System (GPS). The GPS system consists of a number of orbiting satellites providing accurate positioning and location information. However, each GPS satellite also has an integral highly accurate atomic clock that can be used as a timing reference. Utilising the GPS system for time synchronisation has a number of advantages. GPS can provide a highly accurate source of time using a relatively low-cost antenna and receiver. A typical GPS receiver can provide timing information to within a few nanoseconds of UTC. Additionally, the GPS signal can be received anywhere in the world, where the antenna can be provided with a good view of the sky. The disadvantage of using the GPS system is the very fact that the antenna requires a view of the sky. In many installations, locating an antenna on a rooftop can be impractical or expensive.
There are also a number of national time and frequency radio transmissions that can be used to synchronise a stratum 1 NTP server. The advantage of using a radio time reference is that generally a good signal can be obtained indoors close to the host computer. This can greatly reduce potential installation costs. However, radio time references are generally less accurate than GPS systems. Typically, national time and frequency transmissions are accurate to 1 - 20 milliseconds. The radio signal has a finite range and is confined to the local region from which the transmission is generated. Additionally, local interference or environmental issues can cause problems with reception. Placing a radio antenna too close to electrically noisy equipment can result in signal loss. Also, locating an antenna inside a metal enclosure or underground in a basement can also be a problem.
There are numerous radio national time and frequency resources each broadcasting to a regional audience.
The WWVB time and frequency signal is a 60kHz radio broadcast transmitted from Fort Collins, Colorado, USA. The WWVB signal continuously transmits time and frequency signals throughout the US and much of Northern America. The signal provides UTC time to an accuracy of 100 microseconds.
The DCF-77 time and frequency signal is transmitted from Frankfurt, Germany. DCF-77 continuously broadcasts time and frequency information at 77.5kHz. The transmission covers Germany and much of Central and North Western Europe. Time and frequency information is broadcast to an accuracy of
Probably the most widely used NTP reference clock resource is currently the Global Positioning System (GPS). The GPS system consists of a number of orbiting satellites providing accurate positioning and location information. However, each GPS satellite also has an integral highly accurate atomic clock that can be used as a timing reference. Utilising the GPS system for time synchronisation has a number of advantages. GPS can provide a highly accurate source of time using a relatively low-cost antenna and receiver. A typical GPS receiver can provide timing information to within a few nanoseconds of UTC. Additionally, the GPS signal can be received anywhere in the world, where the antenna can be provided with a good view of the sky. The disadvantage of using the GPS system is the very fact that the antenna requires a view of the sky. In many installations, locating an antenna on a rooftop can be impractical or expensive.
There are also a number of national time and frequency radio transmissions that can be used to synchronise a stratum 1 NTP server. The advantage of using a radio time reference is that generally a good signal can be obtained indoors close to the host computer. This can greatly reduce potential installation costs. However, radio time references are generally less accurate than GPS systems. Typically, national time and frequency transmissions are accurate to 1 - 20 milliseconds. The radio signal has a finite range and is confined to the local region from which the transmission is generated. Additionally, local interference or environmental issues can cause problems with reception. Placing a radio antenna too close to electrically noisy equipment can result in signal loss. Also, locating an antenna inside a metal enclosure or underground in a basement can also be a problem.
There are numerous radio national time and frequency resources each broadcasting to a regional audience.
The WWVB time and frequency signal is a 60kHz radio broadcast transmitted from Fort Collins, Colorado, USA. The WWVB signal continuously transmits time and frequency signals throughout the US and much of Northern America. The signal provides UTC time to an accuracy of 100 microseconds.
The DCF-77 time and frequency signal is transmitted from Frankfurt, Germany. DCF-77 continuously broadcasts time and frequency information at 77.5kHz. The transmission covers Germany and much of Central and North Western Europe. Time and frequency information is broadcast to an accuracy of
Related Tags: ntp server, time server, gps ntp server, windows ntp server, windows time server, digital wall clock, atomic clock, time synchronisation, gps clock, gps time, time synchronization, ntp time server, digital clock, gps time server
Dave Evans is a technical author with a background in NTP server solutions, reference clocks and telecommunications. Dave provides a technical authoring service to reference clock and NTP server manufacturers. Dave has also provided a configuration, installation and repair service for computer timing systems. Click here to find out more about NTP server solutions. Your Article Search Directory : Find in Articles
Recent articles in this category:
- Using Keywords Effectively For an SEO Campaign
Keyword research is one of the most crucial parts of an SEO campaign. If you end up choosing the wro - Search Engine Optimization Copywriting Tips
SEO copywriting is not as technical as it sounds but is different from traditional copywriting for t - 3 Tips to Make Money Using Videos
For the last five years video has been a real success in the internet. Now you can find video in alm - Is Social Media Networking Your Next Strategy For Your Online Marketing?
When you try to work on online promotion and online marketing, social media especially social media - Submitting a URL of Your Website
People who make a website usually do research on how to improve not only the quality of their websit - 5 Bad Habits of Article Marketing
There are many ways to advertise your company but having a highly ranked website is the best. Most p - Facts About SEO Services Company
SEO services companies are becoming very popular in the internet marketing world but there are some - 4 Ways Search Engine Optimization Can Be So Powerful
Whether you are an affiliate marketer, small businessman or a large organization, your first step wh - A List of 3 Options For Internet Business
The trend of making money through online business has become trendy now a day. People are shifting t - Getting the Best Affiliate Products For Your Site
Making money online was never so difficult before. There are numerous ways through which you can mak
Most viewed articles in this category:
- The Revolutionized Ebay Etailsolution Software
With the help of eBay, the auction business has received a new meaning. With the help of the many eB - Internet Millions - by Ryan Orrell - Honest Review
REVIEW: "Internet Millions", by Ryan Orrell, is a refreshing new kind of internet marketing e-bo - A Google Adsense Addiction
54% of all Google Adsense publishers admit addiction to click income. A recent online study conducte - Lead Generation for Top Residual Income
At the heart of any good residual income business is a person who knows how to generate leads. Lead - Make Money With Information Ebook Products: The Other End
I don't like thinking of myself as the kind of person that has made it rich on the internet, but in - Repeat Business Equals a Residual Income Stream
Residual income comes from other people reacting to a single action by the business owner. What bet - The NFL & United Way
There are many ways that NFL players help with the United Way. First of all, they donate a lot of th - Seo - Making Money Writing Seo Reviews
If you are a reviewer or critic you are likely to find work writing reviews of products and services - Understanding Perfume Types
Understanding the various varieties of perfume can help to cut through the difficulty in selecting a - Ecommerce Basics: Three Things To Avoid
When you decide to put your ecommerce website together there are a few mistakes that are easy to mak