A member of a science field team operates a subsurface radar in the Nevada desert in February 2020 as part of a practice exercise. Over the course of several days, the field team stood in for NASA's Perseverance rover, sending data to and receiving commands from scientists located remotely, just as the rover will after landing on Mars in February 2021.

For more information about the mission, go to https://mars.nasa.gov/mars2020/.