Sirius RTK GNSS Rover Vs Phantom 4 RTK and general questions

I am looking to build a multirotor with RTK/PPK capabilities equal to or better than a DJI Phantom 4. Based on my preliminary research, I think your SIRIUS RTK GNSS Rover will fit the bill. I have quite a few questions, so I’ll jump right in. Is the module rover only? If I wanted a rover and a base station unit, how would I accomplish that? Would I be able to use a Trimble R10 or R12 as a base station? In other words, if I had a drone with your module, could we use the R10 or R12 for correction data and still perform RTK/PPK?

I have included a list below that has some specifications and capabilities for the Phantom 4 RTK, from It looks like your module wins for the first one! I cannot say which piece of equipment is better in regards to the rest of the list. Can you make a case for Drotek being better in those three areas?

Hover accuracy range:

Phantom 4 RTK:

RTK enabled and functioning properly:Vertical:±0.1 m;Horizontal:±0.1 m. I did not include RTK disabled, because they use vision when RTK is disabled


1 cm position accuracy.

Image Position Offset

Phantom 4 RTK:

The position of the camera center is relative to the phase center of the onboard D-RTK antenna under the aircraft body’s axis:(36, 0, and 192 mm) already applied to the image coordinates in Exif data. The positive x, y, and z axes of the aircraft body point to the forward, rightward, and downward of the aircraft, respectively.


As I build the drone, is image position offset something I need to take into account?

Mapping Accuracy

Phantom 4 RTK

Mapping accuracy meets the requirements of the ASPRS Accuracy Standards for Digital Orthophotos Class Ⅲ** The actual accuracy depends on surrounding lighting and patterns, aircraft altitude, mapping software used, and other factors when shooting


Is there any type of mapping accuracy standard/certification that the Drotek module and/or ZED F9P meets?

Multi-Frequency Multi-System High-Precision RTK GNSS Frequency Used

Phantom 4 RTK

GPS:L1/L2, GLONASS:L1/L2, BeiDou:B1/B2, Galileo: E1/E5a

First-Fixed Time:< 50 s


GPS: L1/L2, GLONASS: G1/G2, BeiDou: B1/B2, Galileo: E1/E5b)

I see that both the Phantom 4 and the ZED F9P uses the same constellations (GPS, GLONASS, BeiDou and Galileo) but appear to use different bands. Can you elaborate on this?

A few additional questions:

-Can you provide any other people or companies that are currently using your module for RTK/PPK purposes? I would love to discuss their set up and how they go about work flows and data management.

-Do you have an antenna that you would recommend for use with your system on a multirotor UAV?