When I start up an calibrate the drone everything is good to go.  There has been trouble once I fy a short while that significant altitude readings variations without the drone moving.  I've even left the drone idling on the ground and watched the altitude readings climb.  This becomes an issue not only for being lower than reported but when I use some of the autoflight features.  Any help would be greatly appreciated.                                                                                                                                                                                                                                                                                                                                          

The altitude comes from a barometer, if the air pressure changes then the indicated altitude will change, there are many reasons that the air pressure may change a little over a few minutes.

How much change are you seeing?

Nigel_ Posted at 2017-5-5 12:24
The altitude comes from a barometer, if the air pressure changes then the indicated altitude will change, there are many reasons that the air pressure may change a little over a few minutes.

How much change are you seeing?

multiple feet....up to 25' sometimes

Just to clarify, what kind of areas are you flying in? Did you notice this right out of the box, or after a firmware update or hard landing?

Try letting it warm up a little more before taking off. Might help.

DJI-Jamie Posted at 2017-5-5 14:33
Just to clarify, what kind of areas are you flying in? Did you notice this right out of the box, or after a firmware update or hard landing?

I noticed it starting after using the Autopilot app, it may have been happening before.  I'm in FL, literally 3' above sea level.

KM5RG-Robert Posted at 2017-5-5 14:36
Try letting it warm up a little more before taking off. Might help.

I tried that a few times and I could watch the altitude climb increase while the drone is still on the ground.

Be cautious idling on the ground.  I have had mine decide to take off on its own because the altimeter changed and the drone was trying to maintain altitude.  This only happened after landing without shutting off motors, but it pays to be careful.

Kneepuck Posted at 2017-5-7 13:09
Be cautious idling on the ground.  I have had mine decide to take off on its own because the altimeter changed and the drone was trying to maintain altitude.  This only happened after landing without shutting off motors, but it pays to be careful.

Solid advice, thank you

Doc Larson Posted at 2017-5-7 08:41
I tried that a few times and I could watch the altitude climb increase while the drone is still on the ground.

While the motors were running or off?
What I was suggesting was let it warm up (motors off) a little more and see. I don't think the altitude will change with the motors off as it sets that at take-off (I think).

Doc Larson Posted at 2017-5-7 08:40
I noticed it starting after using the Autopilot app, it may have been happening before.  I'm in FL, literally 3' above sea level.

Just to make sure I'm on the same page, there's a discrepancy between the readings from the Go app than what's on the Autopilot app or do they both read the same values?

DJI-Jamie Posted at 2017-5-8 15:16
Just to make sure I'm on the same page, there's a discrepancy between the readings from the Go app than what's on the Autopilot app or do they both read the same values?

They will read the same.

Hi having the same problem on a P4 and Android tab reporting 25' up 50 feet off, always lower never higher. I've been watching this for a couple weeks now.. almost always land in at 20 foot high or more. Caused a couple near crashes about ready to return the craft. In the year I've been flying I never noticed this much discrepancy before

I have Autopilot too and have seen this odd altitude event where if I set it to 30 feet in a box pattern, the outward leg may be 30 feet visually, but coming back inward it climbs to maybe 50 feet.  If I allow it to continue in the box it drops to 30 feet again on the outward, but climbs again on the inward.  It's very odd.

In GO 4 I've seen it differ by 45 feet from take-off to landing, but I just chalk it up to not a military type grade aircraft.  Sometimes while flying it shows -6 feet in altitude too.

I too have had this issue since day one. Nobody seems to have a solution.  It happens in the Go 4 app, But it,doesn't seem to occur in the GS Pro app.