Jackson Labs RSR GNSS Transcoder, User Manual

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RSR GNSS Transcoder™ User Manual
44 © 2017 Jackson Labs Technologies, Inc.
In the the HIGHEST holdover indicate mode the unit decreases the signal strength of the highest
elevation satellite by 6dB to indicate that the holdover state is active. An amplitude reduction of 6dB
should easily be distinguished as a significant reduction in SNR as reported by the target receiver,
while still allowing that signal to be tracked and used in the PVT solution. If the highest elevation
satellite changes during holdover then the reduced signal strength satellite will also change.
The format of this command is:
SIMulation:HOLDover:INDicate <SV32 | HIGHEST | OFF>
4.3.8 SIMulation:POSition:MODE
This command specifies the position mode to be set to either the the Fixed or Motion mode. The
fixed position input is detailed in Section
4.3.9 and Section 4.3.10 , while the motion commands are
detailed starting in Section 4.3.18 .
The format of this command is:
SIMulation:POSition:MODE <FIXED | MOTION>
4.3.9 SIMulation:POSition:LLH
This command specifies the current fixed position in Latitude, Longitude and Height (LLH)
coordinates. Height is the GPS height or height above the reference ellipsoid and not height above
Mean Sea Level (MSL).
The format of this command is:
SIMulation:POSition:LLH <lat>,<lon>,<alt>
where latitude and longitude are in degrees and altitude is in meters.
The fields are separated by comas and up to two of the three parameters are optional. Parameters that
are not present are not changed. For example the command:
SIM:POS:LLH ,,1000.0
Only sets the simulated altitude to 1000.0 meters leaving the latitude and longitude unchanged from
previous settings.
The parameters are immediately applied to the position filter input, but the simulated position will
change over time depending upon the SIM:POS:FILTER... settings. Only if the simulation position
filter mode is set to OFF will the fixed position be applied immediately as the simulated position. If
the simulated position filter mode is set to ON the position will traverse from the previous simulated
position to the new position with the selected dynamics parameters maximum jerk, maximum
acceleration and maximum velocity. See Sections
4.3.14 to 4.3.16 for more details on the dynamics
parameters that affect how the unit simulates a transition from one position to the next.
4.3.10 SIMulation:POSition:ECEF
This command specifies the current fixed position in Earth-Centered-Earth Fixed (ECEF)
coordinates. The x,y,z parametesr are in meters.
The format of this command is:
SIMulation:POSition:ECEF <x,y,z>