Barometric vs Sensor Altitude
I launched a 7 minute mission this morning (DJI Mavic Air 2).
The first Destination (just a few feet away from takeoff) is set to 8' ATF in the plan. Upon reaching that Destination, the flight logs show both Barometric and Sensor altitude at 8.3'. (Note: Airdata uses the term "Sonar" for this data, but I think the MA2 actually uses a visual sensor.)
The last step of the mission is a Path that returns to the takeoff point. That Path has a Marker near the takeoff location, set for 8' ATL. When reaching that point, I observed the drone was actually about 3' ATL. The flight logs show Barometric Altitude at 8.3' (wrong) and Sensor Altitude at 3.3' (correct).
I understand how barometric altitude works, and how it can change during a flight. That's why DJI added a visual sensor: To provide more accurate altitude data near the ground (up to about 35').
Question: Does Dronelink have access to the sensor altitude data? Can this be prioritized over barometric when close to the ground, to get more accurate altitude?
Comments
2 comments
You can submit it as a feature request, but unfortunately it's not that simple. The ultrasonic sensor just tells you how close anything is below the drone, and there is no way for us to know if it is actually the ground, or a tree, etc.
Understood. I guess the visual sensor is only useful when moving straight down, as in landing, and wouldn't really be useful during horizontal movement.
Thanks.
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