AOG with F9P alone

I operated AOG with F9P alone.
It became RTKFIX, but the field did not read the direction.
Do I need a compass or IMU to work in the direction of the field?
Also, in the case of F9P alone, when the vehicle is stopped
?? A mark appears, what is the cause?
AOG version is 5.2.0

Direction cannot be calculated from a single point using gps only, you have to move to make a vector to calculate direction.

The imu helps tons once direction is established, if you turn 180 on a single point it will pick up the rotation. Though the gps in this case would only see the one fixed point and not know what is happening.

Bno080 or Bno085 are very good to have.

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