If your name begins with “L” you will especially enjoy this story about the first letter to be laser engraved on Mars. Every once in a while, we see cartoons where a Mars rover is driven in a pattern to make letters in the sand with its wheel tracks. The letters may spell out a silly phrase, and
Illustration of the Mars Perseverance Rover using its SuperCam instrument to laser zap a rock in order to test what it’s made of. Credit: NASA
Mars Perseverance Sol 471 – SuperCam Camera: Three dark laser pits in the shape of a slightly tilted letter “L” were produced in the rock surface of target “Pinefield Gap” as a dry run for marking the surface of a sample core. The L mark is a way to maintain knowledge of the rotational orientation of the rock after the core is cut from the same location.
Mars Perseverance Sol 498 – Right Mastcam-Z Camera: Image taken by the Mastcam-Z right camera taken on Sol 498 showing the two drill holes and abrasion patch on the Skinner Ridge rock surface. Credit: NASA/JPL-Caltech/ASU Fast forward to summer 2022. The SuperCam team was asked to be ready to mark a rock for coring with just a few days of notice. I was on SuperCam operations, and seeing how soon we might need the marks, we decided to switch from a normal observation to a core-marking sequence as a dry run. We had prepared various patterns for the mark. The basic principle is to understand the rotational orientation of the core after it has been removed from the rock and placed in the sample tube.
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