Heure légale Française – vérifier sa synchro
https://heurelegalefrancaise.fr/
Technical
Leap second information
https://www.livescience.com/earth-spin-negative-leap-second
The Earth has been spinning faster lately
Scientists around the world have noted that the Earth has been spinning on its axis faster lately—the fastest ever recorded. https://phys.org/news/2021-01-earth-faster.html
Leap second – how does it work
The precise reference time over the world is based on atomic clock and is maintained by all countries, this time called TAI is continous. The historical time used by people for every day life is based on observed solar time Lire plus …
Time over the world – how does it work
A brief history of the time is defined across the world. 1884: International time is defined Adopted Greenwich as the prime meridian Recommended GMT as the reference time for the world Proposed the time zones system 1 second = 1/86400 Lire plus …
GPS spoofing concern
Today concerns arise around GPS spoofing capability which mean building a system that creates signals that would appear to a receiver to be from GPS satellites. Transmitting these false GPS signals to receivers may cause them to lock onto the Lire plus …
IRIGB optical fiber distribution – TMO3000-T/R
Timelink is pleased to introduce its new optical fiber time transport system. TMO3000-T/R is a transmitter/receiver system made of 2 units allowing transmission of 3 analogs and 4 digitals signal over an optical fiber Signals are digitalized at the input Lire plus …
Spectre and Meltdown Vulnerabilities
Timelink products are protected against those vulnerabilities by the fact that in order to exploit the vulnerability, malware is required to be run locally within the system. When using a Timelink product, only authorized users with the appropriate password can Lire plus …
NTP basic – how it works
NTP is a protocol which allows a customer to be synchronized starting from a TCP/IP network.It was developed to provide a UTC (Universal Time Co-ordinated) of a precision about the millisecond for LAN network and about 50 milliseconds for WAN. Lire plus …
Disciplined clock – Stability and Time Error
When using a disciplined clock (GNSS disciplined for instance), two modes of operation are of importance. Disciplined Mode When the pilot is disciplined, the quality of the algorithm used and the pilot stability characteristics will determine the overall clock stability Lire plus …