53 research outputs found

    Characteristics of flight simulator visual systems

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    The physical parameters of the flight simulator visual system that characterize the system and determine its fidelity are identified and defined. The characteristics of visual simulation systems are discussed in terms of the basic categories of spatial, energy, and temporal properties corresponding to the three fundamental quantities of length, mass, and time. Each of these parameters are further addressed in relation to its effect, its appropriate units or descriptors, methods of measurement, and its use or importance to image quality

    Measurements of Solar Vector Magnetic Fields

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    Various aspects of the measurement of solar magnetic fields are presented. The four major subdivisions of the study are: (1) theoretical understanding of solar vector magnetic fields; (3) techniques for interpretation of observational data; and (4) techniques for data display

    Realistic visualisation of cultural heritage objects

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    This research investigation used digital photography in a hemispherical dome, enabling a set of 64 photographic images of an object to be captured in perfect pixel register, with each image illuminated from a different direction. This representation turns out to be much richer than a single 2D image, because it contains information at each point about both the 3D shape of the surface (gradient and local curvature) and the directionality of reflectance (gloss and specularity). Thereby it enables not only interactive visualisation through viewer software, giving the illusion of 3D, but also the reconstruction of an actual 3D surface and highly realistic rendering of a wide range of materials. The following seven outcomes of the research are claimed as novel and therefore as representing contributions to knowledge in the field: A method for determining the geometry of an illumination dome; An adaptive method for finding surface normals by bounded regression; Generating 3D surfaces from photometric stereo; Relationship between surface normals and specular angles; Modelling surface specularity by a modified Lorentzian function; Determining the optimal wavelengths of colour laser scanners; Characterising colour devices by synthetic reflectance spectra

    Light environment - A. Visible light. B. Ultraviolet light

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    Visible and ultraviolet light environment as related to human performance and safety during space mission

    Program and abstracts

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    The workshop will bring together researchers with interests in planetary dunes from diverse backgrounds in image analysis, modeling, and terrestrial analogue studies.National Aeronautics and Space Administration, Universities Space Research Association, Lunar and Planetary Institute, NASA’s Planetary Dunes Programconvener, Timothy Titus ; scientific organizing committee Timothy Titus ... [and others]PARTIAL CONTENTS: The Answer is Blowin in the Wind: The Remarkable Aeolian Career of Ronald Greeley / J.R. Zimbelman--Source-to-Sink: Comparison of Boundary Conditions for Planetary Aeolian Systems / R.C. Ewing--The Relationships Between Dune-Dune Interactions, Boundary Conditions and Dune Field Development, Al Liwa Basin, the Empty Quarter / M.A. Bishop--Reconstruction of Eolian Bedforms and Paleocurrents at Meridiani Planum, Mars / L.A. Edgar

    Study of a high resolution facsimile system experiment on the surface of the planet Mars Final report

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    High resolution facsimile transmission camera capsule for Mars planetary landin

    Aerometry instrumentation study Final report

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    Techniques and instruments for meteorological measurements in Mars and Venus atmosphere
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