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"Albedo, the ratio of incoming to reflected solar radiation, plays an important role in climate by regulating the amount of shortwave radiation reflected or absorbed and subsequently reradiated as longwave radiation by a surface.” (Burakowski et al., 2015). Albedo changes are related to light scattering which is caused by changes in particle (crystal size) packing density and foreign materials such as algae or dust on the snow; these things impact the melt rate and can be an indicator of snow/water equivalent, which is important for reservoir management.. .

Products:
ASD range
Date:
April 18 2018
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The value of Full-Range Spectroradiometers for measuring Solar Spectral Energy:. Many climate and surface energy balance studies involve monitoring the direct, diffuse and total components of solar spectral irradiance as they relate to the Earth’s atmosphere and surface (ASD Inc., n.d.).Outdoors, the primary source of spectral irradiance is the sun. The diffuse radiation from the sky is found primarily in the visible and UV portions of the spectrum (ASD Inc., 2012).“Because the solar radiation on the sun-surface-sensor path in the 0.4–2.5 μm visible and near-IR spectral regions is subject to absorption and scattering by atmospheric gases and aerosols, hyperspectral imaging data contains atmospheric effects. In order to use hyperspectral imaging data for quantitative remote sensing of land surfaces and ocean color, the atmospheric effects must be removed.” (Gao et al., 2009)“Atmospheric turbidity generally inhibits reliable measures of vegetation and sometimes renders atmosphere-induced variations on canopy spectra to exceed those due to vegetation development. These effects make the accurate and quantitative translation of [vegetation indices] more difficult and complicated.“ (Gao et al., 2000)“The illumination and appearance of the solar/skydome is critical for many applications in computer graphics, computer vision, and daylighting studies. Unfortunately, physically accurate measurements of this rapidly changing illumination source are difficult to achieve, but necessary for the development of accurate physically-based sky illumination models and comparison studies of existing simulation models.” (Kider et al., 2014)“Radiance is normally obtained in the field by nadir measurement of specific ground targets, with incoming solar irradiance spectra typically acquired from coincident measurement of reflected energy flux from reference panels with known spectral and angular scattering properties.” (Peddle et al., 2001)

Products:
ASD range
Date:
April 18 2018
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The value of Full-Range Spectrometers for Petrology:. "Spectra, like human fingerprints, can be used to search for materials with a similar spectrum and to investigate the composition of the material.""Diffusive spectral reflectance (DSR) has been successfully used as a geologic tool to identify mineral phases in rocks and sediments. The method is non-destructive, fast, and relatively inexpensive.""Scattering properties are wavelength-dependent and can vary significantly over the VIS-NIR spectral range. In particular, the phase function of a granular material is affected by both the absorptivity and the external and internal structure of the grains, from the millimeter scale down to the wavelength scale.""Reflectance spectroscopy can yield valuable information on metamorphic intensity in rocks containing white mica, particularly in low-grade sequences where conventional indicators of metamorphic grade are lacking. Futhermore, the information can be obtained with field-portable spectrometer."

Products:
ASD range
Date:
April 18 2018
Language:
English
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Energy in the 21st Century Application Note

When will the Demand for Energy exceed the Conventional Supply?.

Products:
ASD range
Date:
April 17 2018
Language:
English
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Earth Observing Satellites Application Note

A chart of earth observing satellites with technical specifications, including:. NameOperator/CountryLaunch/End DateSensor TypeSpectral ResolutionSpatial (m)Radiometric (bit)Swath (km)Revisit (days)

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ASD range
Date:
April 17 2018
Language:
English
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Caused by oil pollution and waterlogging using spectral and thermal remote sensing.

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Date:
April 17 2018
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Corn stover is regarded as the prime candidate feedstock material forcommercial biomass conversion in the United States. Variations in chemical composition of Zea mays cell walls can obviously affect biomass conversion process yields and economics. Mutant lines were constructed by activating a Mu transposon system. The cell wall chemical composition of 48 mutant families was characterized using near-infrared (NIR) spectroscopy. NIR data were analyzed using a multivariate statistical analysis technique called Principal Component Analysis (PCA). PCA of the NIR data from 349 maize leaf samples reveals 57 individuals as outliers on one or more of six Principal Components (PCs) at the 95% confidence interval. Of these, 19 individuals from 16 families are outliers on either PC3 (9% of the variation) or PC6 (1% of the variation), the two PCs that contain information about cell wall polymers. Those individuals for which altered cell wall chemistry is confirmed with wet chemical analysis will then be subjected to fermentation analysis to determine whether or not biomass conversion process kinetics, yields and/or economics are significantly affected. Those mutants that provide indications for a decrease in process cost will be pursued further to identify the gene(s) responsible for the observed changes in cell wall composition and associated changes in process economics. These geneswill eventually be incorporated into maize breeding programs directed at the development of a truly dual use crop..

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ASD range
Date:
April 17 2018
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English
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CLAMS OverviewField campaign sponsored by CERES, MISR, MODIS-Atmospheres and the NASA/GEWEX Global Aerosol Climatology Project (GACP).. Chesapeake Lighthouse sea platform 20 km east of Virginia Beach, at which NASA and NOAA make continuous, long-term measurements of radiation, meteorology, and ocean waves.. Common set of objectives tied to the validation of EOS data products.. A first CLAMS campaign, currently being planned for July 2001 to validate Terra data products, is a shortwave closure experiment. A second and similar campaign is being considered for 2002 for Aqua data product validation with additional focus in the longwave and on atmospheric water vapor..

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ASD range
Date:
April 17 2018
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CLAMS is a aircraft field campaign that is planned for summer 2001 at the CERES Ocean Validation Experiment (COVE) site – a rigid sea platform 20 km east of Virginia Beach. CLAMS is a clear-sky, shortwave (SW) closure campaign sponsored by CERES, MISR, MODIS-Atmospheres, and GACP. It seeks more accurate.

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ASD range
Date:
April 17 2018
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English
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CLAMS is a aircraft field campaign that is planned for summer 2001 at the CERES Ocean Validation Experiment (COVE) site – a rigid sea platform 20 km east of Virginia Beach. CLAMS is a clear-sky, shortwave (SW) closure campaign sponsored by CERES, MISR, MODIS-Atmospheres, and GACP..

Products:
ASD range
Date:
April 17 2018
Language:
English
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