By National Research Council Staff
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All rights reserved. html TECHNOLOGICAL CAPABILITIES cameras and other sensors. This method proved to be extremely challenging and required a crew that had not only “a knowledge of control techniques and skills, but also definite psychophysical qualities: a capacity for prolonged attention, speed in reaction and in processing information, long-term and current memory, acuteness of vision and hearing . . ”5 Longer lags in communications make this method of operation highly impractical for use beyond the Moon.
B. , “The Galileo Probe Mass Spectrometer: Composition of Jupiter’s Atmosphere,” Science 272: 846, 1996. 40. K. , “Chemistry and Clouds of the Atmosphere of Jupiter: A Galileo Perspective,” in Three Galileos: The Man, the Spacecraft, the Telescope, J. , Kluwer Academic Publishers, Dordrecht, the Netherlands, 1997. 41. A. , “Structure of the Atmosphere of Jupiter: Galileo Probe Measurements,” Science 272: 844, 1996. 42. A. , “Thermal Structure of Jupiter’s Upper Atmosphere Derived from the Galileo Probe,” Science 276: 102, 1997.
In addition, because each wheel was independently driven, Sojourner could use them to dig shallow trenches in the martian soil. A color monoscopic camera was mounted at the back of Sojourner, along with an alpha-proton x-ray spectrometer (APXS). The latter was mounted on an arm that permitted placing its sensor against either rocks or soil. A full elemental analysis of a particular sample required about 10 hours. The color camera imaged the spot where the analysis was carried out. The chemical data returned included some surprises, such as rocks with sufficient SiO2 that quartz appears in their calculated “normative” mineral compositions, and with higher SiO2 than any of the known martian meteorites or any martian soils.