I use RTH every flight. 90 flights and counting. If your Mavic ever flies without control, either directly or indirectly via automated functions, it has a problem and should be sent back to DJI for repair.
You've had 90 flights with no issues? If so, good to know that not every mavic is affected by this bug. It seems like for some people it 'might' be related to calibration (though it seems silly if that's all it is, because some people have calibrated carefully and still had the problem) - but just to see, can I ask how often you calibrate? I've seen people on the forum who say they didn't even calibrate out of the box and it worked, in fact the instructions don't even say you have to calibrate on first use. So I'm interested to know your take. I think it's odd that DJI says to calibrate if you change positions significantly, yet how is it that you don't necessarily need to calibrate on first use if it's shipped from China?I use RTH every flight. 90 flights and counting. If your Mavic ever flies without control, either directly or indirectly via automated functions, it has a problem and should be sent back to DJI for repair.
With few exceptions, when I've experienced TBE, it correlated with a GPS warning, and automatic switching to ATTI mode. When it switches to ATTI, the circular flight path stops, and instead, the MP drifts rapidly away from whatever hover position I had chosen. While in ATTI mode, I apply inputs to bring the MP back to where I want it. So, once a TBE is occurring, you should still have adequate control input - it just won't respond with the precision and accuracy that you're expecting.
Further, all the TBEs have been on a horizontal plane. That is, the altitude has not be affected. Thus, if you find yourself circling, increase your altitude immediately if there are objects at your current altitude. Until you break the cycle (or the unit switches into ATTI mode) the circle will continue to get larger, and you will impact objects.
Until the MP jumps from GPS to ATTI mode, it is very difficult to fly a straight line. And every pause you make will restart the circle. It's quite scary if you're not expecting it. The key is to not panic. You haven't lost complete control. It's not flying away from you on its own. While in GPS mode, it's hunting to for the hover spot and will do so as the circle gets increasing larger. Once it switches to ATTI, it will appear to 'take off' on its own as it drifts (possibly rapidly) in whatever direction it was hurled at the end of the GPS cycle. Keep eyes on the bird (or get orientation through the video down link) quickly and provide input to bring her back to you.
The ATTI interval will switch back to GPS once whatever source of error has been overcome. When it does, you'll see the GPS signal return to normal, and any hover attempt will once again be rock solid.
As to the causes, I'm completely convinced those that are regularly experiencing this issue, despite proper compass calibrations, are suffering from a bug/defect that is NOT resolvable through repeated proper calibrations. If you're experiencing frequent TBEs, contact DJI support.
Today My Mavic took off in GPS mode with 18 satellites the same spot that i always fly in and i was up about 30 feet and it switched to "vision"and then ATTI and the Mavic drifted and started circle. I felt a panic coming on i gained control and landed. i still saw 18 satellites but is was in a red color.
I restarted everything and then i had a perfect flight.
I called DJI and they said some interference could be the issue .
my concern is what if this happens when i am a mile out can i still take control ? And i was also under the impression with the new updates that if the GPS signal is lost the Mavic will RTH on its own in ATTI mode ?
Also what is the "Vision in yellow" in replace of GPS on the top at times ?
Thank you
From your description your incident could be similar to the gpsHealth incidents that others have experienced. If you can retrieve the .DAT file we could take a closer look. To see how to do that go here. It'll be large so you'll have to Dropbox it and provide the link.Today My Mavic took off in GPS mode with 18 satellites the same spot that i always fly in and i was up about 30 feet and it switched to "vision"and then ATTI and the Mavic drifted and started circle. I felt a panic coming on i gained control and landed. i still saw 18 satellites but is was in a red color.
I restarted everything and then i had a perfect flight.
I called DJI and they said some interference could be the issue .
my concern is what if this happens when i am a mile out can i still take control ? And i was also under the impression with the new updates that if the GPS signal is lost the Mavic will RTH on its own in ATTI mode ?
Also what is the "Vision in yellow" in replace of GPS on the top at times ?
Thank you
its 1.5 gigs i will upload to dropbox its the first flight with todays date and you can see the other flights after the restart where flawless. should i share the flight logs in drop box here ?From your description your incident could be similar to the gpsHealth incidents that others have experienced. If you can retrieve the .DAT file we could take a closer look. To see how to do that go here. It'll be large so you'll have to Dropbox it and provide the link.
It's up to you if you want to share here. If not you can PM me with the link.its 1.5 gigs i will upload to dropbox its the first flight with todays date and you can see the other flights after the restart where flawless. should i share the flight logs in drop box here ?
and I thank you both for your help
Jimmy
Dropbox - DJI_ASSISTANT_EXPORT_FILE_2016-12-20_19-27-25.DATIt's up to you if you want to share here. If not you can PM me with the link.
I looked at the first flight. The cause of the incident was a drop in gpsHealth which is not the same as numSats. GpsHealth has a range from 0 (worst) to 5 (best) and is a measure of both vertical and horizontal dilution of precision. With the P3 if gpsHealth drops below 4 the P3 will switch to ATTI mode because the GPS is unreliable.Dropbox - DJI_ASSISTANT_EXPORT_FILE_2016-12-20_19-27-25.DAT
Its the first short flight of today. After that the flights were perfect and the footage i got today was excellent. p
thank you again for looking at the files
Also i have a Mac is there a easy way i can view the logs ? I might have no idea what I am looking at but. LOL
Jimmy