If you have 20 satellite locks and their relative positions in the sky were broad and horizon to horizon, then altitude should have been reasonablly accurate since that data point is based on simple satellite distance/time signal calcuation. So I don't understand why the error would be so high.
Prevailing unusual atmospheric conditions may also affect GPS accuracy, most noteably solar flare... and to a much lesser degree, local wx conditions.
Did you try downloading the google maps for offline use to compare ? We noticed a sim issue with E1 last year, and it was the maps used. Updated the maps, and the error corrected. Not sure what else to tell you. Any others near you with an E2 that you can compare? Our company ordered 4 E2P's and we love them. They are replacing our old E1 fleet.
I have a 4-month-old Evo2 8k, same issue. I just sent it back, they replaced the ICU, and its still the same.
For me, I can fly for 5 mins under 20 feet and it will eventually show me Negative altitude. I can hover at what looks like 10 feet and it says it's at 4 feet on the readout. This is scary for mission flying.
I wrote back and they said have you calibrated it.. I want to scream at him.. You just sent it back to me, surely you tested and calibrated it after replacing ICU.. uuuuuggghhh..!
How can we use a bird for mission flying that doesn't know its correct altitude..
I agree with you. My drone is for recreation not for commercial use where, I would assume, detail is important. I just run the risk of ditching my drone and losing my hard earned pennies. Lets see what Autel says about my issue. I have to say that the lack of capacity to download a flight log and all its detail does not fill me with confidence. Using a phone screen recording device to record the flight log would seem to miss a lot of detail, detail which my old Mavic Air could provide. I shall reserve judgement until I see what the outcome is.
Yes it is an Autel is trying to tell me that it isnt! They will check it out if i ship it to them and pay the costs of shipping it to them and them shipping it back to me, oh and paying them to diagnose it. This particular drone was given to me as a gift and the person who purchased it has passed away and nobody knows where it was purchased from or when. I received it in November of 2019! Not very happy with Autel right now!!
A quick question and I'm sorry if this has already been explained or gone over... But what flight mode are you flying in? Are you using the mission planning to capture these expeditions or are you just going up in a manual mode and taking the pictures as you normally would? If in manual mode I have experienced that you need to broadcast the GPS coordinates along with the intermittent pictures to be taken as you fly without any real user input, but if you are using the mission planner as you should be using it then I don't really know considering you could have a simple setting misconfigured which I know sounds stupid but trust me it happens to the best of us.