NASA’s Mars Perseverance Rover, APPLIED IMAGE Onboard

Since WATSON can be moved around on the robotic arm, it also provides other images of rover parts and geological targets that can be used by other arm-mounted instruments. For example, it can be pointed at the oxygen-making experiment MOXIE to help monitor how much dust accumulates around the inlet that lets in Martian air to extract oxygen.

A calibration target for WATSON is attached to the front of the rover body. It contains a metric standardized bar graphic, similar to Curiosity, to help calibrate the instrument.