Results 261 to 270 of about 10,345 (309)
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Atypical features of a lunar corona
Journal of Optics A: Pure and Applied Optics, 2006The image of a lunar corona recorded in 1979 is examined in detail. It is noticed that the profile is non-circular, the width of the coloured ring is almost independent of the angular distance from the moon, and an outer structure of fine rings is appearing.
Molesini G, Vannoni M
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Feature Extraction from Lunar Images
2011Automatic feature identification from orbital imagery would be of wide use in planetary science. For geo scientific applications, automatic shape-based feature detection offers a fast and non-subjective means of identifying geological structures within data.
V. Tamililakkiya, K. Vani
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The main features of the geochemistry of lunar rocks
Physics and Chemistry of the Earth, 1979Abstract Statistical cluster analysis of 635 individual bulk chemical compositions of lunar rocks distinguishes three major chemical groups which correspond respectively to highland rocks, high titanium mare basalts and mare basalts with moderate titanium contents.
V.L. Barsukov, L.V. Dmitriev
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2009
The Moon is an airless body, devoid of the atmosphere that Earth has to protect it from the impacts of meteoroids. In the case of the Earth, the atmosphere shields the ground from all but the larger (and much rarer) meteoroid collisions. We see the collision between the meteoroid and the atmosphere as a “falling” or “shooting” star, sometimes leaving a
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The Moon is an airless body, devoid of the atmosphere that Earth has to protect it from the impacts of meteoroids. In the case of the Earth, the atmosphere shields the ground from all but the larger (and much rarer) meteoroid collisions. We see the collision between the meteoroid and the atmosphere as a “falling” or “shooting” star, sometimes leaving a
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A feature‐assisted matching algorithm for lunar rover
Aircraft Engineering and Aerospace Technology, 2006PurposeTo present a stereo matching algorithm which satisfies the need of visual navigation on outdoor natural terrain for lunar rover or other mobile robots.Design/methodology/approachA feature‐assisted matching algorithm is presented to generate dense and accurate disparity map of natural terrain.
Jian Hou, Naiming Qi, Hong Zhang
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Small‐area thorium features on the lunar surface
Journal of Geophysical Research: Planets, 2003Using an improved understanding of the Lunar Prospector Gamma‐Ray Spectrometer (LP‐GRS) spatial footprint, we have derived a new map of global thorium abundances on the lunar surface. This map has a full‐width, half‐maximum spatial resolution of ∼(80 km)2 and is mapped on the lunar surface using 0.5° × 0.5° pixels.
D. J. Lawrence +5 more
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Eclipse calculations of lunar features
Vistas in Astronomy, 1972Abstract Measurements of the times when lunar features (especially prominent craters) enter and leave the umbra during an eclipse of the Moon are important in evaluating the enlargement of the observed umbra over the size predicted geometrically. It may be useful to prepare prediction times of these crater entrances and exits.
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Visual feature extraction for lunar surface images
2012 5th International Congress on Image and Signal Processing, 2012Visual feature extraction is foundation of lunar surface topography reconstruction. The paper studies visual feature extraction for lunar surface images, and then offers the visual feature extraction algorithm for lunar surface images. The experimental results show that the algorithm has good adaptability to illumination change, scale change and ...
Guicai Wang, Jianguo Tang, Ying Hou
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Estimation of Local Lunar Gravity Features
Radio Science, 1970A quantitative estimate of the gravity features on the near surface of the moon has been obtained by iteratively constructing a mass density model to improve the agreement between actual Doppler tracking data from Lunar‐Orbiter spacecraft and theoretical trajectory predictions.
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Volcanic features of the nearside equatorial lunar maria
Journal of the Geological Society, 1976A map is presented of the distribution of volcanic features in the lunar maria between longitudes 50°E. and 100°W, and latitudes 50°N. and S. Flood basaltic flows predominate, and where individual flow units can be identified they may be hundreds of kilometres long.
J. E. GUEST, J.B. MURRAY
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