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North American Time Synchronization Sources Time Signal Time Provided Accuracy Source Signal Format Hardware Requirements Linux/Unix Software Windows Software GPS: UTC(USNO) 1575.42 MHz: NMEA 0183 sentences, 1PPS signal. Minimum: GPS receiver that works with one's chosen software; this requires some combination of GPGGA, GPRMC, GPZDA, GPGSA ...
IEEE 1588v2 PTP GPS Master & Slave clocks from Masterclock [69] IEEE 1588v2 PTP GPS Master & Slave clocks from Tekron [70] IEEE 1588v2 PTP GPS Smartgrid clocks from Tekron [70] IPITEK MSP-1588 [71] Open Time Server : 1GbE, Rubidium IEEE 1588 PTP, NTP, SyncE, PPS GNSS grandmaster clock from Timebeat.app [72]
In addition to its use in navigation, the Global Positioning System (GPS) can also be used for clock synchronization. The accuracy of GPS time signals is ±10 nanoseconds. [8] Using GPS (or other satellite navigation systems) for synchronization requires a receiver connected to an antenna with unobstructed view of the sky.
The Precision Time Protocol (PTP) is a protocol for clock synchronization throughout a computer network with relatively high precision and therefore potentially high accuracy. In a local area network (LAN), accuracy can be sub-microsecond – making it suitable for measurement and control systems. [ 1 ]
The network time server in Windows 2000 Server (and Windows XP) does not implement NTP disciplined synchronization, only locally disciplined synchronization with NTP/SNTP correction. [ 44 ] Beginning with Windows Server 2003 and Windows Vista , the NTP provider for W32Time became compatible with a significant subset of NTPv3. [ 45 ]
A GPS disciplined oscillator unit with a GPS antenna input, 10 MHz and 1 pulse-per-second (PPS) outputs, and an RS-232 interface.. A GPS clock, or GPS disciplined oscillator (GPSDO), is a combination of a GPS receiver and a high-quality, stable oscillator such as a quartz or rubidium oscillator whose output is controlled to agree with the signals broadcast by GPS or other GNSS satellites.
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A particular case-in-point is the Android software which can often be run on laptops or PCs (running Linux, Windows or Mac OS X) as well. This can be done using emulators. Some of the software mentioned here may run only on devices that are no longer commercially sold (such as the PalmPilot and PocketPC devices).