Tornado12
lvl.4
Flight distance : 356391 ft
United States
Offline
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The loss of altitude on take off / landing in the same spot suggests barometric pressure causing issue with sensors. This has come up before where folks had their altitude suddenly go crazy and show them flying at like -170 feet, despite being up in the air, well above take off point. DJI in one case responded to a user and said it was due to changes in barometric pressure screwing with the sensor in the drone, and that it was harmless. You likely have the same thing going on. It seems you also have some weird issue going on with the vision sensors.
I took my drone out yesterday after seeing your video and tested it just as you did in your videos. I run my drone in Brake mode though. Im still not 100% trusting of the obstacle avoidance until they get it perfected so I prefer the drone to just STOP if it sees something rather than try to navigate it. In brake mode I had no issues in my tests. I am in Florida, USA though, and below the drone was heavy wooded areas, lots of green leaves. Ive had none of the issues though others have reported. Drifting, altitude, etc etc. The drone has flown exactly as you would expect it to everytime Ive went up. Ive always had 16+ satellites locked in and been in good daylight though.
EDIT: One other thought is that since you mention the issues seem to always happen inside of 80 Feet tells me its 100% an issue with the downard facing vision sensors. Something is throwing them off. In the Owners manual it does talk about the vision system could malfunction when flying over certain things like mirrors and things, but Over white snow? I would run a test... Find a spot whre you have lots of snow. as in your video, then perhaps a transition from snow to something other ground cover, like maybe an asphalt parking lot or something. See if, as you exit the snow and enter the change in ground cover, if the drone immediately changes behaviour.
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