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Curiosity’s science team has finished its work at Namib Dune and has decided to move on, even though they are still analyzing an unspecified issue with the rover’s scoop instrument.
So far, in the week since they first had a problem while sifting sand from the dune, they have not described in any way what the problem is. All they have said is this:
Unfortunately, the CHIMRA behaved in an unexpected way during processing of the third scoop on Sol 1231, which prevented completion of the arm activities planned for last weekend.
The robot arm functions, and they used it yesterday to get some extreme close-ups of the sand, but it appears they cannot use the scoop at this time.