How "Fix GPS Info upon Low Satellites" Works:

If enabled, the message's location/GPS-speed will be fixed based on the number of satellites in that message

If the number of satellites is greater than or equal to the "Satellites Stable Number", nothing will be done
If the number of satellites is less than or equal to the "Satellites Low Number", location/GPS-speed will be fixed
If the number of satellites is between "Satellites Low Number" and "Satellites Stable Number", a new speed will be calculated (based on location change between this message and the previous one)
Location Change Speed (km/h) = Distance Traveled / Change in Time
If "Location Change Speed" is less than or equal to the "Max Reasonable Calculated Speed", nothing will be done, otherwise, location/GPS-speed will be fixed
Fixing location is done by overriding it by the location of the previous message
Fixing speed means setting it to zero
You can choose to enable/disable either of the two fixes