منابع مشابه
Estimating Snow Grain Size Using AVIRIS Data
Es t ima te s of snow grain size for the near-surface snow layer were calculated for the Tioga Pass region and Mammoth Mountain in the Sierra Nevada, California, using an inversion technique and data collected by the Airborne Visible/Infrared Imaging Spectrometer (A VIRIS). The inversion method takes advantage of the sensitivity of near-infrared snowpack reflectance to snow grain size. The Tiog...
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In the present paper, spectral reflectance measurements of Himalayan seasonal snow were carried out and analysed to retrieve the snow albedo and effective grain size. The asymptotic radiative transfer (ART) theory was applied to retrieve the plane and spherical albedo. The retrieved plane albedo was compared with the measured spectral albedo and a good agreement was observed with ±10% differenc...
متن کاملSnow Grain Size from Satellite Images a Review Note No Samba/31/09 Title Snow Grain Size from Satellite Images
This note is a review of works on retrieval of snow grain size from satellite images. A theoretical background is given and a number of models and algorithms are described. Most of the works are based on Landsat images with 30 m resolution and 7 optical channels, but the hyperspectral airborne AVIRIS sensor with 20 m resolution, and SAR has also been used. An algorithm derived from Landsat imag...
متن کاملMapping Snow Grain Size over Greenland from MODIS
This paper presents a new automatic algorithm to derive optical snow grain size (SGS) at 1 km resolution using Moderate Resolution Imaging Spectroradiometer (MODIS) measurements. Differently from previous approaches, snow grains are not assumed to be spherical but a fractal approach is used to account for their irregular shape. The retrieval is conceptually based on an analytical asymptotic rad...
متن کاملRetrieval of snow grain size over Greenland from MODIS
a GEST Center, University of Maryland, Baltimore County, Catonsville, MD 21228, USA b NASA Goddard Space Flight Center, Mail Code 614.4, Greenbelt, MD 20771, USA c City College of New York — CUNY, 138 and Convent Ave., New York, NY 10031, USA d JCET Center, University of Maryland, Baltimore County, MD, 21228, USA e Meteorological Research Institute, Tsukuba, 305-0052 Ibaraki, Japan f Earth Obse...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 2002
ISSN: 0022-1430,1727-5652
DOI: 10.3189/172756502781831016