Where'd you get that? > The mass- and power-constrained rover can achieve high data rates of up to 2 megabits per second on the relatively short-distance relay

Where'd you get that? > The mass- and power-constrained rover can achieve high data rates of up to 2 megabits per second on the relatively short-distance relay link to the orbiters overhead. The orbiters then use their much larger antennas and transmitters to relay that data on the long-distance link back to Earth. > Transmission Rates Up to 2 megabits per second on the rover-to-orbiter relay link. And using DSN Now, we can also see that the speed from Earth to those orbiters is also 2Mbps.