Spectracom VelaSync 1225, User Manual

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option to select not just GPS, but also Galileo and/or BeiDou, thus allowing the col-
lection of RINEX3 navigation files and almanac files for the GPS, Galileo and/or BeiDou
constellations. At this time the GLONASS constellation is NOT supported.
Caution: Do NOT use GLONASS when operating VelaSync as an A-
GNSS server, since this will likely crash the A-GNSS software.
Based on accessible and valid GNSS data, VelaSync generates its own ephemeris and
almanac data, and stores it in RINEX files and YUMA files, respectively.
Note: RINEX files (ephemeris data) must be updated no later than
every 2 hours, because the ephemeris data is valid for 4 hours.
You can also determine how often, or at what time each day the YUMA almanac files will
be created. Also, you can assign a 4-character
Station Name to be used in the files gen-
erated by this unit so that their location can later be identified. Under Record Duration ,
you can determine after how many days the history files will be overwritten.
Note: YUMA files (almanac data) are valid for day.
The files can be remotely accessed via the
/pub
path on the VelaSync or via the mapped
drive.
Confirming that the A-GPS RINEX Server License is installed on your unit
Navigate to TOOLS > SYSTEM: Upgrade/Backup . In the System Configuration
panel the option OPT-AGP A-GPS RINEX Server must be present.
Activating the A-GPS RINEX Server License functionality
If an A-GPS RINEX Server License is installed on your unit, you have to activate it:
1. Navigate to INTERFACES > GNSS Reference , and click the GEAR button next to
GNSS 0 .
2.
In the A-GPS panel, check the box Generate RINEX/YUMA Files and populate
the following options:
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CHAPTER
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VelaSync User's Manual Rev. 3
3.3 Managing References