Using ‘Use best’ in this case would result in using the poorer quality GPS and result in more switching between GPS units. High quality GPS will often have a better quality fix even if it has fewer satellites. This should be used when two dissimilar GPS units are used, one high quality primary unit, and a secondary less accurate unit. Use primary GPS as set with GPS_PRIMARY if it has a 3D fix or better. When using two GPS units there are a number of switching options that can be selected with GPS_AUTO_SWITCH.Īlways use the primary GPS, this can be either the first or second as set with GPS_PRIMARYĪutomatically select the best GPS, this is done based on GPS fix status (2D / 3D / rtk) if both GPSs have the same fix status the one with the larger number of satellites is used.īlend is best suited for use with two identical GPS units, see GPS blending
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