关于这张图
By providing a set of base measurements that were taken on Earth, this calibration target will help fine-tune the settings on the Scanning Habitable Environments with Raman & Luminescence for Organics and Chemicals (SHERLOC) instrument carried aboard NASA's Perseverance Mars rover. There are 10 kinds of materials on SHERLOC's calibration target, including a fragment of a Martian meteorite and five of the first spacesuit materials sent to Mars. They'll be observed to see how they hold up in the intense radiation on the Martian surface. https://photojournal.jpl.nasa.gov/catalog/PIA23980
