As NASA’s Perseverance rover fell through the Martian atmosphere last week, a video camera on the spacecraft captured the breakneck deployment of its parachute, which was decorated with splotches of reddish orange and white. Those splotches were a secret message. During a news conference Monday, Allen Chen, the engineer in charge of the landing system, narrated what could be seen and learned in the slowed-down video. He added, cryptically and nonchalantly, that his team hoped to inspire others. “Sometimes we leave messages in our work for others to find for that purpose,” he said. “So we invite you all to give it a shot and show your work.”
The person who came up with the idea for embedding a message was Ian Clark, who led development of the parachute. NASA’s previous rover, Curiosity, used the same system when it successfully landed on Mars in 2012. But a failure of a prototype parachute intended for future missions spurred engineers to improve the design. While watching video of a high-altitude test of the new parachute for Perseverance, Dr. Clark noticed that the checkerboard pattern on the canopy made it difficult to track how individual portions of the parachute unfurled and inflated.
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https://www.nytimes.com/2021/02/24/science/nasa-mars-parachute-code.html
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