Perturbations and Errors Simulation
Satellite Navigation
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User Manual 1178.6379.02 ─ 01
Show Scaled Values
Switches between scaled and unscaled values representation.
Navigation message values are recalculated automatically.
Remote command:
[:SOURce<hw>]:BB:GNSS:SSValues
12.7 System Errors Settings
Access:
1. Select "Simulation Configuration > Satellites > GNSS system > SV# > SV Config >
Signals Configuration".
2. Select real navigation data as data source.
For example, for a GPS SV ID, select
"Nav Msg Type > LNAV"
.
3. Select
"Nav Msg Control > Edit"
.
4. Select
"Nav Msg Content > Config > Additional Data"
.
Per default, the navigation message parameters are set to values, that correspond
to the values retrieved from the constellation data source.
Available navigation message parameters depend GNSS system and selected
navigation message type.
5. To simulate errors, change the values.
For example, set "User Range Accuracy Index (URA) = 12".
With this URA index, the selected SV is set to unvisible.
Changing any navigation message value leads to deviation between the simulated
and the broadcasted navigation message and thus to a deliberated error.
System Errors Settings
