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Configuring RTK base with DJI Assistant 2
699 7 2017-3-20 09:07:07
Ramiro_Vigo
Beginner
Spain
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Hello,

I think there is a bug here:

When you configure DJI D-RTK (ground segment) it asks for "elipsoidal height" (without saying what datum and coordinate system)

I used a Trimble R8 GNSS GPS with the following measurements for the DJI D-RTK Base:

Lat: 42.16877139 N
Long: -8.68799987 W
Height: 523.294 m (elipsoidal WGS84)

With this good coordinates from Trimble GPS, the RTK is blinking all the time: red and green (not fixed).

But If I get the same point coordinates from Google Earth (not very good coordinates) like this:

Lat: 42.1669960
Long: 8.686421
Heigh: 456 m


Then  D-RTK works, the LED is "FIXED GREEN" (it Works).

But as you can see there is a big difference: 523.294 - 456 = 67.294 m

My questions are three:

(1) Is not very dangerous to Land or use waypoint with Google Earth coordinates in the D-RTK base since there is 67 m of difference?
(2) What datum and system is asking DJI Assistant 2?
(3) Why the DJI GPS (D-RTK ) is not accepting real and true GPS coordinates (WGS84) from a good Trimble GPS,
     but it is accepting not very good Google Earth coordinates?


Best regards,

--
Ramiro Alvarez Clavero
Remote Sensing Service
http://gravatar.com/ramalvclav
Center for Support of Scientific and Technological Research (CACTI)
Vigo University
2017-3-20 09:07:07
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JackOO7
Beginner
Flight distance : 695
Finland
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Very good question indeed.
2017-4-22 13:14:55
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JackOO7
Beginner
Flight distance : 695
Finland
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Very good question indeed. Any answers from dji?
2017-4-22 13:15:42
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Ramiro_Vigo
Beginner
Spain
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JackOO7 Posted at 2017-4-22 13:15
Very good question indeed. Any answers from dji?

No, I reported this problem lots of times but DJI has not answered, this is a proof of the bad technical support offered by DJI in this forum.
2017-5-25 23:22:17
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rick.iseeit
Hobbyist
Canada
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Ramiro_Vigo Posted at 2017-5-25 23:22
No, I reported this problem lots of times but DJI has not answered, this is a proof of the bad technical support offered by DJI in this forum.

Hey Ramiro,

Question...
The D-RTK is plugged into the A3 so does that mean that the A3 will fly with 1cm precision or does the RTK only provide precision data to the camera?

I just started flying a new M600/Pro with RTK and my return-to-home was about 5 feet off the home.
I had GPS was 15 with a blue R.
2017-6-8 16:41:50
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EagleDrone
Beginner
Netherlands
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rick.iseeit Posted at 2017-6-8 16:41
Hey Ramiro,

Question...

D-RTK does not geotag the pictures. I did hear that DJI is working on it, but those rumours are already 6 months old...
2017-6-13 00:25:41
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rick.iseeit
Hobbyist
Canada
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rick.iseeit Posted at 2017-6-13 12:09
RE:
Question...
The D-RTK is plugged into the A3 so does that mean that the A3 will fly with 1cm precision or does the RTK only provide precision data to the camera?
I just started flying a new M600/Pro with RTK and my return-to-home was about 5 feet off the home.


DJI support replied with the following:

"Our RTK provides more accurate positioning when flying and hovering, but when you get it return it to home (RTH button), the drone doesn't use RTK, but just uses its GPS."
I'm happy with that.

The infrared camera that I am currently testing HAS written code (SDK) to get the GPS info from the M600/Ronin-MX to the camera.
I'm not going to mention their name because I'm waiting for them to response satisfactorily to my recent purchase before I start promoting their solution.
Long story.
2017-6-13 12:09:38
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