Campbell, John; King, Penelope; Burkemper, Laura K; Berger, Jeffrey; Gellert, Ralph; Boyd, Nicholas; Perrett, Glynis; Pradler, I; Thompson, Lucy; Edgett, Kenneth; Yingst, R.A.
The Mars Science Laboratory Curiosity rover carries a basalt calibration target for monitoring the performance of the alpha particle X-ray spectrometer. The spectrum acquired on Sol 34 shows increased contributions from Mg, S, Cl and Fe relative to laboratory spectra recorded before launch. Mars Hand Lens Imager images confirm changes in the appearance of the surface. Spectra taken on Sols 179 and 411 indicate some loss of the deposited material. The observations suggest deposition of a surface...[Show more]
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