Reach RTK module availability

I have a quick noob question -
If I have a Navio+ on a RSP2.0, do I need to get 2 reach units for RTK GPS?
or would 1 be enough (as a base station?)

Thanks in advance,
Avihay.

How many rovers can simultaneously connect to the base station?
Бколько Ρ€ΠΎΠ²Π΅Ρ€ΠΎΠ² ΠΎΠ΄Π½ΠΎΠ²Ρ€Π΅ΠΌΠ΅Π½Π½ΠΎ ΠΌΠΎΠΆΠ½ΠΎ ΠΏΠΎΠ΄ΠΊΠ»ΡŽΡ‡ΠΈΡ‚ΡŒ ΠΊ Π±Π°Π·ΠΎΠ²ΠΎΠΉ станции?