Spectracom GSG-5 series, User Manual With Scpi Manual

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Saving RINEX Observation Data
It is possible to store RINEX observations of a running scenario. This feature can be enabled
using the SCPI command:
SOURce:SCENario:OBS <start>,<duration>,<interval>
<start>
Specifies the number of seconds since scenario start to expire before starting to log
observations. Using the parameter ‘- 1’ will start the logging of a running simulation imme
diately.
<duration>
The observation period in seconds. Using the parameter '-1' will log until the
end of the scenario.
<interval>
Is the sample rate.
After the duration/hour is passed or the scenario is stopped, the observations are saved to:
/observations/scenarioNameYYYYMMDDHHMMSS.obs
Each file can contain at maximum 1 hour of data. The generated files can be retrieved via
GSG StudioView , the Web UI, or by using SCPI commands (see "MMEMory:COPY" on
page 306). Additionally, a link named
/observations/latest.obs
points to the
latest generated file.
Observation files supported include GPS, GLONASS, Galileo, BeiDou and mixed. The RINEX
file can be used in post-processing with the navigation data obtained from receiver.
Saving RINEX Navigation Data
It is also possible to log RINEX navigation data for a running scenario. This feature can be
enabled using the SCPI command:
SOURce:SCENario:NAV <ON|OFF>
After each six hours or when the scenario is stopped, the navigation data is saved to:
/observations/scenarioNameYYYYMMDDHHMMSS.nav
The generated files can be retrieved via GSG StudioView , the Web UI, or by using SCPI com
mands (see "MMEMory:COPY" on page 306).
Additionally, a link named
/observations/latest.nav
points to the latest generated
file.
The files are in RINEX 3.0.2 mixed format. As the unit generates new navigation data sets quite
rarely, it is recommended that navigation data logging is enabled before starting a scenario.
Navigation data logging is turned off when scenario stops.
5.7 YUMA Almanac File
During scenario start- up, the GSG simulator generates a GPS constellation almanac in the
Yuma format. The generated file is named
observations/alm_ gps.txt
and can be
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User Manual GSG-5/6 Series Rev. 26
5.7 YUMA Almanac File