Sols 1818-1819: Brushfest
15 September 2017
We are planning only 2 sols today because there will be a soliday on Sunday
to get us back in sync with "Mars time" in Gale Crater. The focus of
science planning this morning was on observations of the current
workspace,
including an
experiment to acquire APXS and MAHLI data on a bedrock target before and
after brushing. MAHLI images of three potential DRT targets were
received and used to determine which of these small
exposures could be brushed. One had small pebbles in the DRT
ellipse, so could not be brushed, but both of the other targets
("Christmas Cove" and "Mitten Ledge") are brushable. So the APXS will
measure the chemistry of Christmas Cove before it is brushed off, then
will be placed on the brushed spot to measure chemical differences.
MAHLI will image both targets before and after brushing, then acquire a
full suite of images on a layered block dubbed "Whittum." Also on Sol
1818, ChemCam will shoot its laser at another layered bedrock block
named "Medomak." Mastcam will also image Medomak, the Sun, and the
crater rim to measure dust opacity in the atmosphere. That night, the
APXS will be placed on Mitten Ledge for a long integration.
On
Sol 1819, Navcam will search for dust devils before ChemCam acquires
passive spectra of Christmas Cove and Mitten Ledge. Mastcam will then
acquire multispectral observations of Christmas Cove and more distant
"Jaquish Ledge" before the rover drives away. After the drive, in
addition to the standard imaging, DAN will execute two active
integrations. Because the Martian winter is approaching, we are
planning more heating, which reduces the power available for other
activities. Therefore, it was difficult to fit all of the above into
the plan today, making for a challenging day for me as SOWG Chair. We
had to shorten or delete some scientific observations, which was
painful, but I'm happy with all of the science we were able to plan
today!