How to Simulate the Atmospheric of Mars

The parachute that will get the mars 20 20 rover on to the surface of mars has opened perfectly great. The thing about this is so, so one, you have to figure out how to simulate the atmosphere of mars. We can actually simulate this really accurately. And then they have a different loads that is on the end of the parachute to make ure that the parachute doesn't rip or rupture.