Results 261 to 270 of about 14,343 (306)

Chemical Mapping of Planetary Surfaces

IEEE Transactions on Geoscience Electronics, 1976
Two instruments, the gamma-ray spectrometer and the X-ray fluorescence spectrometer, are uniquely suited to the chemical mapping of planetary surfaces from orbit. Through their detection of characteristic line spectra they measure the concentrations of a suite of elements in each area overflown.
E. L. Haines, J. R. Arnold, A. E. Metzger   +2 more
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Mobility on Planetary Surfaces

2012
Exploration vehicles, either manned or automatic, can use a variety of means of locomotion to achieve their goal. A first distinction must be made between ground vehicles, i.e. vehicles supported by a solid surface, atmospheric or sea vehicles, i.e.
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Planetary Core and Surface Temperatures

SSRN Electronic Journal, 2013
The paper explains why the physics involved in atmospheric and sub-surface heat transfer appears to have been misunderstood, and incorrectly applied, when postulating that a radiative “greenhouse effect” is responsible for warming the surfaces of planets such as Venus and our own Earth.A detailed discussion of the application of the Second Law of ...
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The physics of lunar and planetary surfaces

Contemporary Physics, 1974
Abstract The physical properties of the surfaces of members of the Solar System have now been investigated by Earth-based optical and radio telescopes, by instrumented space vehicles passing by or landing and, in the case of the Moon, by manned and unmanned landings with the establishment of instruments on the surface and the return of samples to Earth.
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Photopolarimetric sensing of planetary surfaces

Advances in Space Research, 1985
Abstract Polarization measurements over the surfaces of the Moon, Mercury, Mars and Saturn's rings, and global data for the Galilean satellites, have been recorded with telescopes in France. A number of asteroids were measured by B. Zellner in USA. The curves of polarization are diagnostic of the micro-texture of the surface, and demonstrate that all
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Aeolian Modification of Planetary Surfaces

1982
Any planet or satellite having a dynamic atmosphere and a solid surface has the potential for aeolian processes. Survey of the Solar System shows that wind plays an important, and in some regions, the key role in surface modiflcations. Most deserts and many coastal oreas on Earth are subject to aeolian processes, Seasonal dust storms sweep the surface ...
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Photometry of Resolved Planetary Surfaces

2001
The study of reflected light forms the first method of investigating the properties of a planetary surface. The reduction of the observed broad-band radiance into parameters which describe the surface properties can be confusing, however, because of differences in nomenclature and definition used by authors.
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Ages of planetary surfaces

2022
Tracy K.P. Gregg, Paul K. Byrne
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Robotic Planetary Surface Exploration

IFAC Proceedings Volumes, 1998
Abstract This is a brief text of speech given by the author as the opening plenary talk at the 3rd IFAC Symposium on Intelligent Autonomous Vehicles. Mter a brief introduction about JPL's past, present, and future missions, it presents Sojourner rover and its accomplishments as well as JPL's research on Long Range Science Rovers. References 1, 2, and
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Planetary Surfaces

2020
Colette Salyk, Kevin Lewis
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