Ntp gps server - using satellite time signals
| Added: 20-06-2006 Author: Richard N Williams Category: GPS |
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GPS system works with the transmission clock this time with the satellite position and velocity. A satellite navigation receiver will work out when he received this time how long it takes signals to reach and how far he traveled. Using three or more signals from a satellite navigation device can this work exactly where it is.
GPS can do so only because the atomic clock that is used to transmit time signals. These signals during transport, because all the radio signals, the speed of light so that the inaccuracy of only 1 millisecond (1 / 1000 seconds) can cause the satellite navigation is about 300 miles out.
For these reasons, Clocks so accurate, they make an ideal source for NTP time server. NTP (Network Time Protocol) is a program that distributes the time from when the web server. GPS time and UTC (Coordinated Universal Time) on the time scale is not a civil right but something is a basic NTP don the same time scale so that no conversion problem. GPS uses a network NTP server dedicated realistically be synchronized within a few milliseconds UTC
GPS Clock another term often given GPS time server. Network has 21 active GPS satellites (and some spare parts) 10.000 miles in orbit above the Earth and each satellite circles the Earth twice a day. Designed for navigation satellites, the GPS receiver requires at least three satellites to maintain position. However, in the case of GPS satellites is only one hour is needed to ensure a simple signal.
Each satellite transmits its position to continue as a code. The time code generated by an onboard atomic clock, very accurate, is that if this information is used by the GPS receiver to triangulate position and whether it was only the second half Sat Nav out. units will be right and thousands of miles.
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