Crash with mini 2 after firmware update v1.04.0000

Camino Ken · Apr 8, 2022

eEridani said:
My point above is that GPS becomes unreliable; could be accuracy doesn't suffer much IF you can maintain a stable connection to the satellites - though I might argue a 16m RMS error isn't ignorable. The paper is clear and confirms my main point. During these events increased ionospheric noise is problematic and leads to higher levels of receiver phase lock error, thus they can play havoc: 56% loss of lock is not insignificant.

To quote the paper:

The intense storm the paper discusses was G2; the March 31 storm was G3, a result of multiple ejections.

I am impressed that you went through the paper in detail. Most folks eyes would have glossed over after a few paragraphs. Kudos to you.

You quoted a max number of 16m. Where did you see this, I must have missed it. The largest numbers I saw where in 1-2m.

it should be noted as well that the cycle slip errors are transitory, typically lasting fractions of a second although in some cases a few minutes.

I think it is also helpful to keep all of this in perspective so folks aren’t unnecessarily alarmed. These are statistical phenomena and on average will have minimal to no effect for most people. The worst case situations tend to occur at high latitudes where a smaller percentage of people live.

eEridani · Apr 11, 2022

Camino Ken said:
I am impressed that you went through the paper in detail. Most folks eyes would have glossed over after a few paragraphs. Kudos to you.

You quoted a max number of 16m. Where did you see this, I must have missed it. The largest numbers I saw where in 1-2m.

it should be noted as well that the cycle slip errors are transitory, typically lasting fractions of a second although in some cases a few minutes.

I think it is also helpful to keep all of this in perspective so folks aren’t unnecessarily alarmed. These are statistical phenomena and on average will have minimal to no effect for most people. The worst case situations tend to occur at high latitudes where a smaller percentage of people live.

It's the RMS error they reported for distance issues under the strain of high TEC in intense and super storms (>X1). But going back to find the exact place, the only place I find 16 is in Table 2; so my note must be a transcribe error of the 1.6m RMS in the conclusion. I went back and corrected my previous post. A 1.6 meter error is negligible.

Thanks for the catch.

The thing is, frequency lock of a PLL can take time, and a frequent loss of lock can look all the world like a worse SNR to the radios involved. Which is what the log in this case shows (lots of "weak GPS" warnings. Since it was a noisy sun day, flare CME might be a reason.

Fil007 · Apr 15, 2022

Fil007 said:
I was flying a few days ago after the update and the drone lost contact with the satellites and just went crazy. As a result, it deviated from me and the battery ran out and fell into a swamp about 170-180 meters from me. Sometimes I had no control over him. I took it to the store where it was bought 2 months ago and they will send it for replacement. I wanted to use the guarantee, not the insurance. I'm not sure if they will respect my warranty and apply a flight record if there are specialists to review this record and explain to me if I can request a replacement warranty or if I have to use DJI insurance?

Hello again,
The store where I bought it and gave it now in exchange told me that DJI told them that the repair cost me 305 euros because it is not covered by the warranty because the drone hit and fell into the water. If I want I can use DJI Care, I will have to pay 95 euros and they will send me a new one. I don’t want to use DJI Care because the drone crashed due to a loss of GPS signal and it just went crazy and as a result it veered away from me and its battery ran out while I was trying to get it back, so it landed in an emergency. Please look at the flight records and tell me if this problem is not covered by the warranty or I agree with DJI Care?
Here are the two fields again who wants to compare them.
31.03.2022