Is it possible to use any GPS module for RTK on Ground Station?

Hardware Vendors CubePilot/ProfiCNC/HEX
1

Hi,

I have a plane setup, which have got pair of Here3 GPS.

Also, I have Radiolink SE100 GPS from my old APM setup, which works fine. Can I use SE100 on G.S. for RTK purpose?

2

Here3 GPS can support high-precision positioning. It uses the u-blox m8p chip. If you have both the flow and the reference, you can use the inject method in the mission planner to achieve RTK high-precision positioning.
Radiolink se100 is a u-blox m8n chip, which only supports single-point positioning and cannot achieve high-precision positioning (RTK), but you can connect to GPS2 for redundancy.