Thank you for the question.
While, given normal conditions the device accuracy is withing 3meters. I would say that good radius is 10meters for personal estimation and device should report the position within this circle. 99+% of the time.
There is no command for such parameter. Whats your application and why do you need it?
Remember that the measured location is a result of constantly changing conditions (moving satellites/moving car/objects nearby that impact the signal.). Therefore, it's a matter of change, even if you knew the accuracy you only know the circle and at best probability where the estimated location point is most likely to appear.
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