Communications with Earth
NASA's Mars 2020 mission uses the NASA's Deep Space Network (DSN), an international network of antennas that provides communication links between planetary exploration spacecraft and their mission teams on Earth.
The Deep Space Network consists of three deep-space communications complexes placed approximately 120 degrees apart around the world: at Goldstone, in California's Mojave Desert; near Madrid, Spain; and near Canberra, Australia. This strategic placement permits constant links to distant spacecraft even as the Earth rotates on its own axis.
As with previous Mars landers and rovers, the Mars 2020 mission relies on Mars-orbiting spacecraft to relay data from the rover to the antennas of the Deep Space Network.