NASA's Perseverance rover regularly images a Sherlock Holmes–themed maze to calibrate its chemical-hunting SHERLOC instrument.

Why does NASA's Perseverance rover keep taking pictures of this maze on Mars?

Source: space
Source Link: https://www.space.com/space-exploration/mars-rovers/why-does-nasas-perseverance-rover-keep-taking-pictures-of-this-maze-on-mars