GPS Systems for NTP Time Servers and Timing Applications
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Today, GPS is most commonly known for vehicle navigation solutions. However, the GPS system for many other useful purposes can be used. For example, many network solutions for computer time synchronization, such as NTP time server, use the atomic clocks aboard the GPS satellites for accurate timing. The GPS system can be used as an accurate clock reference for synchronization of time-critical applications on computers and networks. This article describes howComputer systems can use the GPS time and discussed the equipment needed to provide a reference point precision timing.
The GPS is a U.S. military intended for global navigation. The GPS system is a spatial system consisting of a network of 24 satellites in orbit. Precise navigation and positioning is achieved through the use of signal timing and precision of triangulation between different satellites. To ensure a very precise time, everySatellite has an integrated high-precision atomic clock on board. Each satellite transmits the timing information within a few nanoseconds for the right moment to express the position with an accuracy of better than 10m. The exact timing will be information you can from NTP servers and other devices to the computer as a timing reference used very precise moment. The great thing about GPS is that it works around the world and is completely free to air service.
Each GPS satellitesends a signal low-power radio for the earth's surface. Two separate frequencies are used, called L1 and L2. The band is the L1 civil signal, transmitted at 1575.42 MHz L2 is the specter of military, designed for extremely high precision positioning. The transmission of radio signals through the air through the line of sight. The transmitted signal is easily powerful enough to pass through clouds, glass and most plastics, but also absorbs more important material such as brick,Covering materials and metals. The ideal place for a GPS antenna tends to be outdoors and, ideally, on a roof with the best view of the sky.
To get this calendar and GPS location information, some relatively inexpensive equipment, is not required. A GPS antenna can be used to improve the GPS and radio signals. While a GPS receiver decodes the information and presents it in a computer readable format. Many antennas are availablewith integrated receiver, but these have the disadvantage of only a few meters of cabling offers the NTP host server or computer. Rugged Marine GPS antennas mounted on a screw threaded rod rigid capable of withstanding the worst weather conditions. These antennas offer the best solution for static timing applications.
The GPS receiver is usually the NTP server, embedded or encapsulated in a wrapper. A GPS receiver is a small elecronicDevice, the GPS signals will be amplified by an antenna is replaced by a coaxial cable. The receiver decodes these signals and provides an output on computer, it is usually through an RS232 or USB. Most of the receiver decodes information such as: location, satellites visible, the exact time and a precise reference timing pulse output.
The coaxial cables are used to provide a link between the GPS antenna and receiver. The distance the cable can be critical. The antenna mustenhance the GPS signal enough to overcome all the losses used to run cable to the cable. Improved quality antennas generally provide more amplification (gain) addition of a higher quality coaxial cables can be much smaller signal loss per meter used allows for a relatively long cable runs between the antenna and receiver. For the preparation of longer cables, amplifiers can be used to promote more GPS signals in order to overcome the losses of the cable. Typically, a GPS SAT-amplifierOnline coaxial cable and is powered by the receiver. Multiple amplifiers can be run for extremely long cable used.
A roof mounted GPS antenna can be vulnerable to lightning and power surges. It is recommended that surge arresters are used to protect expensive NTP server timing systems from potential damage. An increase is essentially a barrier that is seated in line on the coaxial cable between the antenna and receiver, which protects the recipient from anypotential damage due to power surges.
In conclusion, the GPS system provides a reference to a very precise timetable for NTP servers and computer equipment of other times. This is a reliable, free, can be used anywhere in the world of air. In addition, with the boom in car navigation technology is needed to obtain satellite channels in steady decline included.
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