Glos­sary

Glos­sary of Terms

The fol­low­ing is a glos­sary of some of the terms com­monly used in the dig­i­tal time set­ting process. Please be advised that in explain­ing these terms we place an empha­sis on how the topic relates to the over­all process of data as evi­dence — data as tes­ti­mony that meets legal, reg­u­la­tory and indus­try stan­dards. As a result, some of the def­i­n­i­tions raise spe­cific issues as to evi­dence and court admis­si­bil­ity rather than focus­ing on pure tech­nol­ogy issues.

• BIPM Bureau Inter­na­tional de Poids et Mesures)
• Chronome­ter
• Drift
• Ephemeris Time
• GMT (Green­wich Mean Time)
• GPS (Global Posi­tion­ing System)
• Hard­ware or Embed­ded Clock
• Latency
• Leap Sec­ond
• Legal Metrol­ogy
• Metrol­ogy
• Microsec­ond
• Mil­lisec­ond
• Naval Obser­va­tory (USNO)
• NIST(National Insti­tute of Stan­dards and Technology)
• NTP (Net­work Time Protocol)
• pool​.ntp​.org The NTP POOL Project
• Sec­ond
• SI
• SNTP (Sim­ple Net­work Time Protocol)
• Soft­ware Clock
• Stra­tum Server
• TAI (Inter­na­tional Atomic Time)
• Trace­abil­ity
• UDP (User Data­gram Protocol)
• UTC Uni­ver­sal Coör­di­nated Time
• USNO the United States Naval Observatory
• USTim­ing (US Time Server Foundation)
• Zulu or Zulu Time (aka UTC)