Results 151 to 160 of about 2,936 (194)

Photovoltaic arrays for Martian surface power

Acta Astronautica, 1993
Missions to Mars will require electric power. A leading candidate for providing power is solar power produced by photovoltaic arrays. To design such a power system, detailed information on solar-radiation availability on the Martian surface is necessary.
Joseph Appelbaum, Geoffrey A. Landis
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Digital Topography Models for Martian Surfaces

IEEE Geoscience and Remote Sensing Letters, 2005
We propose to use an unsupervised automated classification of topographic features on Mars in order to speed up geomorphic and geologic mapping of the planet. We construct a digital topography model (DTM), a multilayer grid that stores various kinds of topographical information for every pixel in a site.
T. Stepinski, R. Vilalta
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Modelling Martian Moons' Surface Temperature

IntroductionThe two martian moons, Phobos and Deimos, will be visited by the sample return JAXA mission MMX in 2027 (launch planned in October 2026). They orbits Mars at respectively 9400 and Deimos at 23000km, with low inclinations and eccentricities. Their heavily processed surfaces harbour a fine regolith [1].
Robin Sultana, Antonella Barucci, Cédric Leyrat, Gaël David   +3 more
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Permafrost features on the martian surface

Icarus, 1968
Abstract Permanently frozen ground may be a distinct possibility in all latitudes on Mars. Mean shallow subsurface temperatures are below the freezing point of water. Given a supply of water, either meteoric or juvenile, minor topographic features will develop in permafrost areas.
F.Alton Wade, Jane Negus De Wys
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The morphology of the Martian surface

Space Science Reviews, 1980
Most of the southern hemisphere of Mars is densely cratered and stands 1–3 km above the topographic datum. The northern hemisphere is more sparsely cratered and elevations are generally below the datum. A broad rise, the Tharsis bulge, centered at 14° S, 101° W, is 8000 km across and 10 km above the datum at its summit. The densely cratered terrain has
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Scratching the surface of martian habitability

Science, 2014
Are the right chemical ingredients enough to make a habitable planet?
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The composition of the Martian surface

Icarus, 1964
Abstract It is generally believed that the desert areas of Mars are composed of limonite. This model of the surface, while based upon polarimetric, spectrometric, color, and albedo measurements, contradicts a reasonable geologic model. An examination of the evidence for limonite on Mars shows that the above measurements are ambiguous.
Roger A. Van Tassel, John W. Salisbury
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Martian surface harmonics and continental drift

Physics of the Earth and Planetary Interiors, 1971
Abstract Recent radar and spectroscopic determinations of topographic heights on Mars reveal that the planet possesses a distribution of surface harmonics similar to that of the Earth. This similarity is manifested in the dominance of the first five harmonics with a rapid decline of higher order terms.
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Neutron environments on the Martian surface.

Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB), 2002
Radiation is a primary concern in the planning of a manned mission to Mars. Recent studies using NASA Langley Research Center's HZETRN space radiation transport code show that the low energy neutron fluence on the Martian surface is larger than previously expected.
M S, Clowdsley, J W, Wilson, M H, Kim, R C, Singleterry, R K, Tripathi, J H, Heinbockel, F F, Badavi, J L, Shinn   +7 more
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment

Ca-A Cancer Journal for Clinicians, 2022
Jun J Mao,, Msce, Lorenzo Cohen, Karen M Mustian   +2 more
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