Everything tested out perfectly, from the chute opening, heat shield blasting away, rockets firing, and then the cable deploying for the lander to be lowered to the surface.
FORBES: 7 Minutes of Big Data: Driving NASA's Mars Curiosity
As the spacecraft descended, it sent back signals when critical events occurred: heat shield separation, parachute deployment, retro-rocket firing.
NPR: Mars Rover Marks Second Anniversary of Landing
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