Results 161 to 170 of about 1,972 (193)

Physical parameters of the martian atmosphere

Earth, Moon, and Planets, 1989
The following physical parameters have been computed from 0 to 200 km altitude; (1) pressure, (2) density (3), speed of sound, (4) density, (5) number density, (6) mean free path, (7) viscosity, (8) pressure scale, (9) mean particle velocity, (10) collisional frequency and (11) columnar mass.
Basil Petropoulos, Constantin Macris
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Is there a Martian atmospheric electric circuit?

Journal of Geophysical Research: Planets, 2001
Laboratory, analytical, and simulation studies suggest that Martian dust clouds can become significantly charged via dust/dust contact electrification. If moderate‐size dust clouds on Mars are like their terrestrial counterparts, they are expected to have the capacity to create electric fields in excess of 1 kV/m.
W. M. Farrell, M. D. Desch
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Buildup with Bremsstrahlung in the Martian Atmosphere

Nuclear Science and Engineering, 2020
Photon buildup is a function of energy, medium, and geometry and therefore must be specifically calculated for the case of interest.
Praneel P. Gulabrao, Kevin T. Clarno
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Change in the Martian Atmosphere

1999
There are several lines of evidence that the atmosphere of Mars has significantly evolved over the history of the planet. Because Mars does not have a strong intrinsic magnetic field, the atmosphere is eroded by interactions with the solar wind. Conditions in the early solar-system significantly enhanced this loss, notably the component due to solar ...
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Determination of the temperature of the Martian atmosphere

Journal of Quantitative Spectroscopy and Radiative Transfer, 1975
Abstract We have calculated the temperature distribution of a Martian atmosphere using the high-resolution spectroscopic data of Carletonet al.(1) and the theory of Goody and Gierasch.(8) Models of the Martian atmosphere have been developed and synthetic spectra of the 1·05 μCO2 spectrum in the Martian atmosphere have been computed.
A. Sharma, V.B. Singh
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Photochemistry of the Martian Atmosphere

1986
A problem and ways to solve it. Consider a problem of the calculation of ionospheric composition with the neutral upper atmospheric composition being known.
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Disentangling xenon components in Nakhla: martian atmosphere, spallation and martian interior

Geochimica et Cosmochimica Acta, 2001
A powdered sample of Nakhla was separated into 3 subsamples. One was left otherwise untreated, one was washed in water and one etched with HNO3 removing 6% of the original mass. We report results of isotopic analysis of xenon released by laser step heating on aliquots of each of these subsamples; some aliquots were neutron irradiated before isotopic ...
Gilmour, J. D.; id_orcid 0000-0003-1990-8636, Whitby, J. A., Turner, G.   +2 more
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Photochemistry of nitrogen in the Martian atmosphere

Icarus, 1977
Models are developed for the photochemistry of a CO_2-H_2O-N_2 atmosphere on Mars and estimates are given for the concentrations of N, NO, NO_2, NO_3, N_2O_5, HNO_2, HNO_3, and N_2O as a function of altitude. Nitric oxide is the most abundant form of odd nitrogen, present with a mixing ratio relative to CO_2 of order 10^(−8).
Yung, Yuk Ling, Strobel, Darrell F., Kong, Ten Ying, McElroy, Michael B.   +3 more
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Atmospheric effects on Martian aerocapture

17th Atmospheric Flight Mechanics Conference, 1990
A preliminary study of the effects of the atmosphere on Martian aerocapture has been completed at NASA-Johnson. Nominal cases were defined and several types of density dispersions utilized to show the effect of L/D ratio on aerocapture performance. Both open and closed loop three-degree-of-freedom simulations were developed.
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Diurnal Tide in the Martian Atmosphere

Journal of the Atmospheric Sciences, 1976
Classical atmospheric tidal theory is extended to include the effects of large-amplitude planetary-scale variations of the terrain height. Utilizing simple models of the thermotidal forcing, the resulting technique is used to compute the diurnal tide in both the dust-free and the dust-laden Martian atmosphere.
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