The project I am working on involves very long flight times (greater than 1 hour) at altitudes of up to 1000' feet (I know about the NAS restrictions but am just using this altitude as a target).
Because of the long flight times, it does not seem that barometric sensing would work (and I am not sure how accurate that would be anyway). Also, I understand that the altitude data from GPS is unreliable and can be off be several meters.
I have an ArduIMU and was just wondering if there is an accurate way of getting altitude data beyond sort of dead reckoning.
Thanks for any insight,
James
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