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Hello

I am using Pixhawk AC3.3 and two ublox m8n gps (primary and secondary redundancy).   I am currently facing two problems with gps.

1)  latitude and longitude for both gps mismatch nearly 4 to 5m difference in position 

2) whenever the SP in EKF4 spikes to 1 or more, gps switch from primary to secondary. But how it happens? when SP spikes to 1 or more??

Gps problem.png