We’re using a Sparkfun GPS-RTK breakout board with ZED-F9P on a drone. We have a relatively slow radio (Sparkfun Xbee XB9X-DMUS-001) we’re using to send ground-based RTK data to the GPS-RTK on the drone, and also to receive the GPS data from the drone on the ground.
Is it possible/practical to receive GPS data (without RTK correction) from the drone and then apply the RTK correction data with a computer on the ground? This would save us having to send the RTK data to the drone in the first place.
It’s not a matter of recording NMEA Sentences and “Fixing It”
The volume of data to post-process is quite high. You’d want to be logging UBX-RXM-RAWX packets continuously, or RTCM3 out of the drone. These forms would need to be run through RTKCONV or RTCM3TORINEX type tools to generate RINEX files for post processing.
What you’d probably want to consider is logging the data directly to a MicroSD card on the drone with one of the assorted logging stamps, like Open Log, Open Lager, or a Black Box recorder from the Flight Controller if that’s possible / enabled.