Spectracom GSG-5 series, User Manual With Scpi Manual

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Figure 3-7:
Leap second configuration
The leap second field can be set to -1, 0 or 1, and indicates a future change in the leap second
value. While the
Δ
t
LS
is set automatically based on information in the used ephemeris data, the
value given in the leap second field will impact values related to LSF (Leap Seconds Future).
If the leap second value is set to a value other than zero
The following values will be used:
Δ
t
LSF
=
Δ
t
LS
+ value given in the leap second field
WN
LSF
= The GPS week number (eight bit representation) of the week that includes the 30th of
June, or 31st of December, which-ever comes first with respect to the scenario start time.
DN = Day number of the date described above.
If the leap second is set to zero
The following values will be used:
Δ
t
LSF
=
Δ
t
LS
WN
LSF
= WN
LS
– 1
DN = 1
Considerations
Note that downloaded and default navigation data files do not contain any LSF information
(RINEX v2.1). Therefore it is still necessary to set the LSF when a leap second change will occur,
in order to ensure correct behavior. The default UTC/GPS offset currently is set to 17 seconds
(see
Options > Interface and reference: Network > Network configuration: NTP server ).
3.5.7 Event Data
Events can be used to introduce changes into a running scenario. Events can be used to change
the power levels of satellites, to control multipath settings, and to control navigation bits, e.g.
simulating bit errors in the navigation message. Events are captured in event files.
Each line of an event file describes one event, using one of the following formats:
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User Manual GSG-5/6 Series Rev. 26
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