The DJI D-RTK 2 Mobile Station can be used as a compatible solution for the Phantom 4 RTK (P4R) to provide high-accuracy geotagged images. Propeller does not sell this base station and did not produce this product, so all questions should be sent to DJI. 

 

Note—The D-RTK 2 Mobile Station is a type of Real-time Kinematic (RTK) workflow, but it is not compatible with the Propeller PPK workflow. The Propeller PPK workflow is only optimized to work with data collected from AeroPoints and the DJI Phantom 4 RTK drone.

 

Please read the User Guide that came with your base station. It is available for download on the DJI website.

 

Collecting Data

Set up the base in a clear open area, away from obstructions (including large bodies of water) and power lines. Make sure it is stable and level. 

 

You must place the base station on a known point by centering the tripod over the known point. If the base is not set up over a known point, you will not be able to successfully process your data in Propeller. 

 

This is essential if you will be flying the site repeatedly, if you need to export the data into another software package that requires global accuracy, or if you will be importing designs into Propeller for comparison. 

 

Exception—If the flight is for a one-off mission (such as for stockpile volumes, etc), you do not need to set the base over a known point. 

 

Power on the base station. You will hear the fan running if the station is on. You will use Operating Mode 1 for the Phantom 4 RTK.



Link the base to the remote controller and the aircraft using the instructions on page 6 of the user guide.


To input the known point coordinates into GS RTK

  1. Tap on Fly.

  2. Tap on the RTK icon in the top menu. 

  3. After an RTK link has been established, scroll to the bottom of the RTK menu and click Advanced Settings.

  4. Input the known point coordinates for the base station location.

These coordinates should be in lats/longs and ellipsoid height. The height given needs to include the antenna height above the known point on the ground.

 

Make sure the difference in distance between the input and actual coordinates is less than 5 (sometimes listed as 50) meters, or the input will not work.

 

When calculating the height of the antenna, you need to add 141.9mm to the length of the pole to get the phase center distance.



 

Uploading the Data

You will need to upload the data collected using this workflow for high-accuracy geotagged photo datasets

 

When uploading the data, the image geotag vertical datum option must be set to ellipsoid height.

 

If you flew with a Phantom 4 RTK drone and the D-RTK 2 Mobile Station, you do not need to include the .BIN and .MRK files normally associated with Propeller PPK processing. If you do include them, without a PPK license, the upload will be blocked until the data files are removed.

 

Please contact your Customer Success Engineer if you have any questions about this workflow. 

 

For more information on the D-RTK 2 Mobile Station, you can refer to the FAQs on the DJI website.


I still can't do it!

We wrote these articles to arm you with everything you need to get the job done on your own, but we understand that sometimes this isn't sufficient.

If you're stuck, the Propeller Hardware Support team may be able to help. You can contact our support team by emailing hardwaresupport@propelleraero.com.au or by clicking the support tab on the top-right pane of your user portal.