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Configuring RTK base with DJI Assistant 2
90 0 2017-3-20 09:07:07
Ramiro_Vigo
Beginner
Spain
Offline

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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