Note that UTC is not a time zone, but a time standard, i.e. it is
not used anywhere in the world as the official local time,
whereas GMT (Greenwich Mean Time) is a time zone that is
used in several European and African countries as the official
local time.
TAI: International Atomic Time (Temps Atomique International).
The TAI time scale is based on the SI second and is not adjusted
for leap seconds. As of 5- March-2024, TAI is ahead of UTC
by37 seconds. TAI is always ahead of GPS by 19 seconds.
GPS: The Global Positioning System time is the timescale main-
tained by the GPS satellites.
Global Positioning System time is the time scale maintained by
the GPS satellites. The time signal is provided by atomic clocks
in the GPS ground control stations. The UTC–GPS offset as of 5-
March-2024 is 18 seconds.
For more information on Timescales, see "Timescales" below.
4. If you want to override the system time with a manually set User Time,
check the Manual Time Set checkbox. For information, see "Manually Set-
ting the Time" on page161.
5. Click Submit to update the System Time and close the window.
3.2.1.2 Timescales
The System Time can be configured to operate in one of several timescales, such
as UTC, GPS and TAI (Temps Atomique International). These timescales are
based on international time standards, and are offset from each other by varying
numbers of seconds.
When configuring VersaSync, in most cases, UTC will be the desired timescale to
select.
Note: UTC timescale is also referred to as “ZULU” time. GPS times-
cale is the raw GPS time as transmitted by the GNSS satellites (in
2018 the GPS time is currently 18 seconds ahead of UTC time. UTC
timescale observes leap seconds while GPS timescale does not).
3.2 System Time
CHAPTER 3 • VersaSync User Manual Rev. 12
159
To Next Page
Loading...
