Journal ArticleDOI
Light scattering by randomly oriented crystals.
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TLDR
The scattering phase function and the degree of linear polarization for small crystals oriented randomly in space have been computed using the geometric ray tracing theory and assuming that the crystals are homogeneous and isotropic.Abstract:
The scattering phase function and the degree of linear polarization for small crystals oriented randomly in space have been computed using the geometric ray tracing theory and assuming that the crystals are homogeneous and isotropic. Calculations have been carried out for the main crystal geometries. Detection of halos from crystals other than hexagonal water ice is briefly discussed. The crystal size and shape parameters have also been averaged over some simple distributions in order to examine general light scattering properties of sharp-edged particles. A scalar physical optics correction has been developed for the geometric optics phase functions. Results can be applied to light scattering from regoliths and planetary rings, and possibly also to atmospheric halos. Retroreflecting crystals in the regolith would cause an opposition spike, a phenomenon observed for many bright satellites.read more
Citations
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Journal ArticleDOI
Advances in understanding clouds from ISCCP
TL;DR: The progress report on the International Satellite Cloud Climatology Project (ISCCP) describes changes made to produce new cloud data products (D data), examines the evidence that these changes are improvements over the previous version (C data), summarizes some results, and discusses plans for the ISCCP through 2005.
Book
Theory of Reflectance and Emittance Spectroscopy
TL;DR: In this article, the authors present a review of vector calculus and functions of a complex variable and Fraunhoffer diffraction by a circular hole, and a miscellany of bidirectional reflectances and related quantities.
Journal ArticleDOI
Modeling phase functions for dustlike tropospheric aerosols using a shape mixture of randomly oriented polydisperse spheroids
TL;DR: In this article, the authors used the rigorous T-matrix method to extensively compute light scattering by shape distributions of polydisperse, randomly oriented spheroids with refractive indices and size distributions representative of naturally occurring dust aerosols.
Journal ArticleDOI
Bidirectional Reflectance of Flat, Optically Thick Particulate Layers: An Efficient Radiative Transfer Solution and Applications to Snow and Soil Surfaces
TL;DR: In this article, a simple and highly efficient and accurate radiative transfer technique for computing bidirectional reflectance of a macroscopically flat scattering layer composed of nonabsorbing or weakly absorbing, arbitrarily shaped, randomly oriented and randomly distributed particles is described.
Journal ArticleDOI
Earth as an Extrasolar Planet: Earth Model Validation Using EPOXI Earth Observations
Tyler D. Robinson,Victoria S. Meadows,David Crisp,Drake Deming,Michael F. A'Hearn,David Charbonneau,Timothy A. Livengood,Sara Seager,Richard K. Barry,Thomas Hearty,Tilak Hewagama,Carey M. Lisse,Lucy A. McFadden,Dennis D. Wellnitz +13 more
TL;DR: The validated forward model can be used to simulate Earth's time-dependent brightness and spectral properties for wavelengths from the far ultraviolet to the far infrared and extended into the mid-infrared by comparing the model to high spectral resolution observations of Earth from the Atmospheric Infrared Sounder.
References
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Journal ArticleDOI
Retroreflectance from a dense distribution of spherical particles
Yasuo Kuga,Akira Ishimaru +1 more
TL;DR: In this article, the backscattered intensity from a dense distribution of latex microspheres is measured near the retroreflection direction and it is shown that a sharp peak appears in the retro-reflective direction when the volume density is above 1%.
Journal ArticleDOI
Backscattering enhancement of random discrete scatterers
Leung Tsang,Akira Ishimaru +1 more
TL;DR: In this article, a second-order multiple-scattering theory of discrete particles is proposed to explain the angular width of backscattering from a random distribution of discrete scatterers.
Journal ArticleDOI
Polarized light scattering by hexagonal ice crystals: theory.
Q. Cai,Kuo-Nan Liou +1 more
TL;DR: A scattering model involving complete polarization information for arbitrarily oriented hexagonal columns and plates is developed on the basis of the ray tracing principle which includes contributions from geometric reflection and refraction and Fraunhofer diffraction.
Journal ArticleDOI
Minor planets and related objects. XX - Polarimetric evidence for the albedos and compositions of 94 asteroids
Ben Zellner,J. Gradie +1 more
TL;DR: Polarimetric observations for a total of 94 asteroids were presented and analyzed in this paper, where numerical parameters describing the polarization-plane curve, the maximum depth of the negative branch, geometric albedo, and diameter were presented.
Journal ArticleDOI
Scattering of solar radiation by hexagonal ice crystals.
TL;DR: It is shown that both plate- and columnlike ice crystals show a strong backscattering and the effect of orientation on the light scattering, and that columnlike crystals randomlyoriented in a plane behave rather like spherical particles and not like columns randomly oriented in space.
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