Spectracom GSG-5 series, User Manual With Scpi Manual

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The leap second field can be set to -1, 0 or 1, and indicates a future change in the leap second
value. While
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 L
SF
(Leap Seconds Future).
When the leap second 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 (8-bit representation) of the week holding the 30th of June, or
31st of December, whichever comes first with respect to the scenario start time.
DN = Day number of the date described above.
When the leap second is set to zero
The following values will be used:
Δ
t
LSF
=
Δ
t
LS
,
WN
LSF
= WN
LS
– 1, and
DN = 1
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 L
SF
when a leap second change will occur,
in order to ensure correct behavior. The default UTC/GPS offset—as of 2016—is set to
17 seconds (it will be 18 seconds in 2017).
The four leap second almanac variables are:
WN
LSF
: Week number when the leap second becomes effective
DN : Day number when the leap second becomes effective
Δ
t
LS
: Current or past leap second value
Δ
t
LSF
: Current or future leap second value.
4.9 Studioview Tasks
4.9.1 What Is StudioView?
GSG StudioView™ software for Windows
®
enables you to create and edit scenarios, and per
form file management tasks with Spectracom's GSG series GPS/GNSS simulators.
While GSG simulators are capable of configuring and running scenarios without the need for
an external computer, StudioView Windows
®
software offers several additional benefits:
Create, edit and organize all scenario parameters including dynamic events
Create, edit and visualize trajectories with mapping tools
4.9 Studioview Tasks
CHAPTER
4
•
User Manual GSG-5/6 Series Rev. 26
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