I have an Ublox SAM-M8Q GPS module from Drotek, which works quite good so far.
In u-center UBX-CFG-GNSS configration I activated Galileo GNSS in and saved it.
Then ArduCopter was using GPS, GLONASS, GALILEO and SBAS at 10 Hz update rate.
Got 23 sats with HDOP of 0.55, which is quite good I think.
Unfortunately SAM-M8Q has no flash to permanent save the settings, just a battery backup RAM.
The battery is too weak, so the settings are lost after some hours and Galileo is off again.
Then in Mission Planner I set Parameter GPS_GNSS_MODE to 71, which should activate GPS, GLONASS, GALILEO and SBAS at ArduCopter boot time.
But the UBX-CFG-GNSS setting did not change! I verified with MAVSerial-Pass and u-center.
It also did not work with a different Drotek NEO-M8N module, which I updated to ublox firmware 3.01. Also other values for GPS_GNSS_MODE did not work.
GPS_AUTO_CONFIG is set to “1”.
Is GPS_GNSS_MODE working at all?
How can I activate Galileo with ArduCopter?