13 September 2015
Sols 1102-1104: Arm error recovery
Posted by Ryan Anderson
The Sol 1101 activities that we planned yesterday did not complete due to an arm error while it was being stowed. Apparently the shoulder azimuth motor was too cold, so the rover software halted the stow, which precluded the drive that was to follow. The rover is therefore in the same position that it was yesterday.
I’m not scheduled in any operational role today, but I called in to help plan MAHLI imaging of the ChemCam optical window, to monitor dust accumulation. The operations team had to scramble to recover from the arm error and plan science observations, but was able to put together an excellent weekend plan. On Sol 1102, MAHLI will take the standard images of the rover wheels, then acquire a full suite of images of a rock dubbed “Badlands.” APXS will then be placed on the rock for an overnight integration. Arm work will continue on Sol 1103, with MAHLI images of the ChemCam window. Then ChemCam and Mastcam will observe targets named “Madison” and “Jefferson.” On Sol 1104, the RMI and Mastcam will take images of a bright ridge on the flank of Mt. Sharp, then ChemCam and Mastcam will observe “Lincoln.” Mastcam will also acquire another mosaic of the wall of Bridger Basin, then the rover will drive to the bright Murray outcrop “Saddle” as planned yesterday. Fortunately, the Sol 1104 orbiter overflight geometry is better than it was yesterday, so we expect to receive all the data needed for planning on Monday. Finally, early on Sol 1105, Mastcam and Navcam will observe the sun and sky soon after the Mars Odyssey orbiter flies over, so that orbiter observations can be compared with nearly simultaneous observations from the surface. Overall, not a bad plan, considering that the operations team had to quickly respond to the arm error!
by Ken Herkenhoff
Dates of planned rover activities described in these reports are subject to change due to a variety of factors related to the Martian environment, communication relays and rover status.