Labroides Posted at 2018-6-25 02:56
The Circle of Error is a term based on the GPS determination of probable position and its variance.
I'm well aware of what the circle of error is and understand only too well how in/accurate GPS is.
I just can't see how it makes any difference to DJI's programming of the Phantom to land in place if RTH is triggered within 20 metres.
"The great mystery is: Why did DJI add this?"
It may not be a mystery after all. I contacted DJI support Facebook/USA with that question.
(And another one beforehand. They come back within a couple of minutes with detailed explanations. Nice!)
Here is their answer:
For your concern, the drone was programmed that way. RTH function is a safety feature that you can trigger if the drone needs to return to the home-point depending on the circumstances and the location. If the drone is near, then RTH is not needed, since you can use the RC to move the drone to a safer place, or to the home point.
To me it's an easy answer that makes sense. Why would you need the RTH function with ascending first (and maybe ending up in trees) if the drone is so close while still being able to interrupt that 'Landing Here' procedure to maneuver the drone to a safe place?
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