3.28.1.22. AT$XTRAEN - GpsOneXTRA feature control
This command enables/disables the GpsOneXTRA Feature.
When GpsOneXTRA feature is enabled:
If standalone GNSS session is started and there is no XTRA
assistance data file in device, The XTRA file downloading is
triggered, and it always requires data service.
An XTRA file contains orbit predictions for constellations, which are
valid up to 7 days. With valid XTRA data present, a GNSS engine on
modem can eliminate the need for GNSS navigation data
demodulation over the air and reduce the time required for
generating a position fix.