In a not completely unexpected development, Emlid, the guys that make the single L1 frequency Reach RS and Reach RS+ have now released this....
https://reachrs2.emlid.com
Reach RS2 triple-frequency L1/L2/L5 multi-constellation (GPS, GLONASS, Galileo and BeiDou) ruggedised receiver for the equivalent of roughly £1,500.
To put that into context if you were going to buy the equivalent portable RTK base (or rover) from Topcon or Trimble (or any of the other major players) it would...
Portable All Constellations Triple-Frequency RTK Receiver/Base for $1899
https://reachrs2.emlid.com
Reach RS2 triple-frequency L1/L2/L5 multi-constellation (GPS, GLONASS, Galileo and BeiDou) ruggedised receiver for the equivalent of roughly £1,500.
To put that into context if you were going to buy the equivalent portable RTK base (or rover) from Topcon or Trimble (or any of the other major players) it would...
Portable All Constellations Triple-Frequency RTK Receiver/Base for $1899
