Hi guys,I have a big issue with my Dji Spark. I'm very confident flying this drone, becouse of RTH function, unfortunately after 5 min from take-off he lost GPS signal, disconnect from RC and go to ATTI mode (that is my last log on RC). I know the last pozition of the drone but he didin't land there becouse of wind, I know the wind direction and speed but i don't know how to claculate where he approximately land.


Drone: dji spark
Drone last poz: at the end of the video
Drone last recorded battery level: 68%
Wind: 3 m/s
Wind direction: on the photo

Video: https://drive.google.com/open?id=1ja1-aGSu-VhONkt7m8aTieQjLW_7EzAG
Photo: https://drive.google.com/open?id=1PnZdSToa0h2LXnhst_f5p9Rde84C_fbx

Hello and good day wiwi1212. I am sorry to know what happened to your previous flight with your DJI Spark. This is not the experience we want you to have with DJI. I understand that there's a possibility that your drone is not on the last location due to the wind condition however, it is still ok to give it a try. You can still try to find it using the DJI Go 4. The App version should be 4.0.3 or above is required. In the APP main interface, tap the upper-right corner button (three bars) → Find My Drone. The map interface appears and there is a red airplane icon. Click the airplane icon to display a buzzer. If your product is within the warranty period, the best thing you need to do is to contact our support team at: https://www.dji.com/support?site=brandsite&from=nav for additional help and analysis on the DJI Spark. Please take note that DJI will not perform data analysis for cases occurring after the expiry of the warranty. If you need further assistance with your case, please let us know. Thank you for your support

Hi wiwi,

sorry for your loss, if you like upload your flightlog on here
using > https://www.phantomhelp.com/LogViewer/Upload/

Mayby its possible to give an estimated landing position.

cheers
JJB

JJB* Posted at 3-17 02:50
Hi wiwi,

sorry for your loss, if you like upload your flightlog on here

Ahem. You mean flight record, right? ;)

nilanjan118 Posted at 3-17 04:58
Ahem. You mean flight record, right? ;)

yes,  the flightrecord.txt file (on the mobile device)

Hi I found logs https://www.phantomhelp.com/LogViewer/XCQ1T5YNSNKRSVIDDK75, but how It is possible that the drone send me position after disconnected form RC ?
I'll go to his last pos and try to found it, do you think that after last position he feel down or he goes far away?

wiwi1212 Posted at 3-17 07:12
Hi I found logs https://www.phantomhelp.com/LogViewer/XCQ1T5YNSNKRSVIDDK75, but how It is possible that the drone send me position after disconnected form RC ?
I'll go to his last pos and try to found it, do you think that after last position he feel down or he goes far away?

Hi,

Had a look at your flight.

First you started this flight with zero satellites and no reception.
OPTI mode after take-off, this for few seconds, into ATTI mode.
In OPTI/ATTI mode max height is limited, see warning  "Max Altitude Approached. Wait for the GPS satellite signal recovery before ascend." This warning 4x in the GoApp.

After 46 seconds 4  satellites with no reception.
Still trying to fly higher (stick up) but nope, still at 30 meters.

At 1m6 seconds 10 sats and 2 bars, so latLon postions are there!
HomePoint recorded at 1m9 seconds and again at 1m30s.

At 2m57 a compass errror followed by speed and yaw errors (typical spark...)
At 3m26 Exit P-GPS and into ATTI mode. Away from home 290 meters.

In ATTI mode you have to control the AC by yourself, use the compass indicator to yaw back home and pitch forward. (in the log you only pushed up...)

Spark drifted on the wind in the heading 037 with some 8 m/s.
Distance away 290 meters, at the end distance of 606 meters.

After loosing connection with the RC and in ATTI Sparl will perform an autolanding.

My calulated guess is the orange marking on the map.

cheers
JJB

JJB* Posted at 3-17 08:27
Hi,

Had a look at your flight.
[Image]

*Mistake*

JJB* Posted at 3-17 08:27
Hi,

Had a look at your flight.
[Image]

Thanks a lot, but can you send the “orange line” top view?

wiwi1212 Posted at 3-17 08:46
Thanks a lot, but can you send the “orange line” top view?

yes, ofcourse it is a really estimated calculated postion.Must be somewhere between last postion know flying and towards this point, close to orange marking i hope.
Good luck with searching!

JJB* Posted at 3-17 08:55
yes, ofcourse it is a really estimated calculated postion.[Image]

Thanks for you’re time this is anker point for me. Tomorrow I’ll go there and ask peoples about Spark. Thanks a lot

JJB* Posted at 3-17 08:55
yes, ofcourse it is a really estimated calculated postion.Must be somewhere between last postion know flying and towards this point, close to orange marking i hope.
Good luck with searching![Image]

So if he auto land after lost RC signal, why he doesn’t land on the end of the yellow ( green ) path ?

was it in VLOS?

snowbird pilot Posted at 3-17 09:58
was it in VLOS?

I’m can’t see the drone, has he a VLOS mode or something

wiwi1212 Posted at 3-17 10:03
I’m can’t see the drone, has he a VLOS mode or something

but I forgot turn off “Allow indors flights”

wiwi1212 Posted at 3-17 09:53
So if he auto land after lost RC signal, why he doesn’t land on the end of the yellow ( green ) path ?

In ATTI with no RC input the drone drifts with the wind.
Same for autolanding in ATTI mode.
Only when the drone receives and uses the GPS signals a RTH after disconnects will be executed.

JJB* Posted at 3-17 11:57
In ATTI with no RC input the drone drifts with the wind.
Same for autolanding in ATTI mode.
Only when the drone receives and uses the GPS signals a RTH after disconnects will be executed.

So if that is correct don't you think that drone should be farther away, he has more than 60% of battery and for distance more than 300m he used only 5-6%  

wiwi1212 Posted at 3-17 12:26
So if that is correct don't you think that drone should be farther away, he has more than 60% of battery and for distance more than 300m he used only 5-6%

No, beacuse after a full disconnect from the RC in ATTI mode it will start an autolanding after few seconds. So in this case battery level does not have any influence on that.

I hope you have a tel number/email adress on the drone or on the sd card, if landed is someone`s garden....

cheers
JJB

DJI Paladin Posted at 3-16 15:26
Hello and good day wiwi1212. I am sorry to know what happened to your previous flight with your DJI Spark. This is not the experience we want you to have with DJI. I understand that there's a possibility that your drone is not on the last location due to the wind condition however, it is still ok to give it a try. You can still try to find it using the DJI Go 4. The App version should be 4.0.3 or above is required. In the APP main interface, tap the upper-right corner button (three bars) → Find My Drone. The map interface appears and there is a red airplane icon. Click the airplane icon to display a buzzer. If your product is within the warranty period, the best thing you need to do is to contact our support team at: https://www.dji.com/support?site=brandsite&from=nav for additional help and analysis on the DJI Spark. Please take note that DJI will not perform data analysis for cases occurring after the expiry of the warranty. If you need further assistance with your case, please let us know. Thank you for your support.[Image]

What an unhelpful response. Why not tell him how to find his drones last location using the app or don’t you know how it works. Maybe you do not even fly a drone but at least try to be of some use.  

wiwi1212 Posted at 3-17 10:03
I’m can’t see the drone, has he a VLOS mode or something

VLOS= you can see the drone with your eyes. that is the law

JJB* Posted at 3-17 12:29
No, beacuse after a full disconnect from the RC in ATTI mode it will start an autolanding after few seconds. So in this case battery level does not have any influence on that.

I hope you have a tel number/email adress on the drone or on the sd card, if landed is someone`s garden....

Unfortunately i don't have any of this, but i make a few advertisement about lost drone. Now I only need to wait.
"after full disconnected form RC ..." what do you mean saying "full disconnected" can it be half disconnected or 1/4 disconnected. And after I loose control (my moves on RC don't make any differences to drone) this is full disconnected or how much disconnected?

snowbird pilot Posted at 3-17 13:11
VLOS= you can see the drone with your eyes. that is the law

i was flaying and the drone disappear form my view and flay away in ATTI mode

wiwi1212 Posted at 3-17 13:11
Unfortunately i don't have any of this, but i make a few advertisement about lost drone. Now I only need to wait.
"after full disconnected form RC ..." what do you mean saying "full disconnected" can it be half disconnected or 1/4 disconnected. And after I loose control (my moves on RC don't make any differences to drone) this is full disconnected or how much disconnected?

JJB can probably better answer this, but I think what he is saying is, fully connected = GPS, everything working. Then it is less connected when it loses GPS and goes into ATTI mode, its also less connected when you are getting warning messages. It's not really a black and white, got connection, lost connection, there are degrees of connection it's working in and trying to make full connection, but it can equally go the other way and be trying to make connection then lose it all together.

wiwi1212 Posted at 3-17 13:11
Unfortunately i don't have any of this, but i make a few advertisement about lost drone. Now I only need to wait.
"after full disconnected form RC ..." what do you mean saying "full disconnected" can it be half disconnected or 1/4 disconnected. And after I loose control (my moves on RC don't make any differences to drone) this is full disconnected or how much disconnected?

sometimes only the video feed is gone......but still possible to steer the craft using the sticks!
If you not aware of this ; panic!! and more panic!! when the drone is out of sight.

With no video feed the little attitude/compass indicator still gets info from the drone, so use this to fly back manually.
My advice is to practise how to use this compass feature, and fly back manually (cover up the rest of the screen.....)

For me a full disconnect = no connection AC<>RC, so hope RTH works in a GPS mode. (99,9% works)
"Half disconnect" = only video feed is not present....



cheers
JJB

Great analysis JJB

snowbird pilot Posted at 3-17 13:11
VLOS= you can see the drone with your eyes. that is the law

To be precise, not only "see" it, but also being able to see the birds attitude (orientation).

Cheers,
Wolferl

Wolferl Posted at 3-18 03:56
To be precise, not only "see" it, but also being able to see the birds attitude (orientation).

Cheers,

i dont see that in the USA laws- is this in austria laws you are talking about

snowbird pilot Posted at 3-18 09:55
i dont see that in the USA laws- is this in austria laws you are talking about

Hi,

I don't think its a special Austrian thing. The law says you need to be able to judge the aircrafts attitude at all times, without any tools except normal glasses (goggles are not allowed, you'll need a spotter then).
That's difficult to do with a Spark 300 metres away.... *g*
That's only logical, because it doesn't help you to just "see" the bird, if it unexpectly drops to ATTI mode.
I think that's the reason why we are allowed to fly in daylight only.

Cheers,
Wolferl

Here in the USA,   it is FAA regulation that the drone must be visible at all times. -- Visual Line of Sight.

Some people "stretch" this interpretation by having a spotter some distance from them that can maintain LOS even when the pilot can not.   However, I think that is probably very much against the rules.

Sid

JJB* Posted at 3-17 08:27
Hi,

Had a look at your flight.
[Image]

hello also lost a drone over the forest, can you help me in searching?

Gieroy Posted at 4-11 20:43
hello also lost a drone over the forest, can you help me in searching?

Hi Gieroy,

Ofcourse, ii can give it a try.

If you upload your flightlog using this > https://www.phantomhelp.com/LogViewer/Upload/

cheers
JJB

JJB* Posted at 4-11 22:38
Hi Gieroy,

Ofcourse, ii can give it a try.

Hey JJB,

Same for me, your help would be much appreciated to find my lost spark.

Thing is that I'm on holiday and leave the place in 1 and a half day..

Thanks in advance,

Jeremy

https://www.phantomhelp.com/LogViewer/1KGTXDOFWV9JW286HSXY/

meltingpot Posted at 4-13 14:54
Hey JJB,

Same for me, your help would be much appreciated to find my lost spark.

Hi,

sorry for your loss.

The whole flight no GPS lock (low on sats # and zero for reception), so no position for use to calculate or guess where it has landed.Only at the end 11 sats and 2 bars for reception, but after loss of connection in ATTI it will autoland.


cheers
JJB

ICBS
Inter Continental Balistic Spark?

JJB* Posted at 4-14 01:25
Hi,

sorry for your loss.
[Image]

Thanks for your reply. In fact I saw what you said but I was wondering as he had 11 sats while autolanding if that was a possibility to get some coordinates?
Have a nice day

Droffarc Posted at 4-14 05:12
ICBS
Inter Continental Balistic Spark?[Image]

Nope, I was on a cruise ship in west Africa, gave my spark to a friend over there, reached Mexico and then made it fly.

meltingpot Posted at 4-14 05:25
Thanks for your reply. In fact I saw what you said but I was wondering as he had 11 sats while autolanding if that was a possibility to get some coordinates?
Have a nice day

Hi,

Autolanding in ATTI is possible, no GPS recordings in your log.

cheers
JJB

JJB* Posted at 4-14 06:25
Hi,

Autolanding in ATTI is possible, no GPS recordings in your log.
[Image]

Too bad, thanks again for your reply. You think the warranty is useful in my case?

Cheers

meltingpot Posted at 4-14 08:03
Too bad, thanks again for your reply. You think the warranty is useful in my case?

Cheers

Oops, i am no specialist about warranty claims etc. sorry.\
Just contact DJI for this.

https://www.phantomhelp.com/LogViewer/QUKJMNS4L5E8LCDV621N/