Results 71 to 80 of about 128,825 (209)

Acquisition and analysis of coastal ground-truth data for correlation with ERTS-1 imagery [PDF]

open access: yes
The author has identified the following significant results. Radiance profiles drawn along cruise tracks have been examined for use in correlating digital radiance levels with ground truth data. Preliminary examination results are encouraging.
Anikouchine, W. A.
core   +1 more source

Calibration of longwavelength exotech model 20-C spectroradiometer [PDF]

open access: yes
A brief description of the Exotech model 20-C field spectroradiometer which measures the spectral radiance of a target in the wavelength ranges 0.37 to 2.5 microns (short wavelength unit), 2.8 to 5.6 microns and 7.0 to 14 microns (long wavelength unit ...
Kumar, R., Robinson, B., Silva, L.
core   +1 more source

Proposal to evaluate the use of ERTS-1 imagery in mapping and managing soil and range resources in the Sand Hills region of Nebraska [PDF]

open access: yes
The author has identified the following significant results. Increase in radiance values is directly related to decrease in vegetative biomass, though not in a linear manner.
Drew, J. V.
core   +2 more sources

The Environmental Light Characteristics of Forest Under Different Logging Regimes

open access: yesEcology and Evolution
Light is a fundamental attribute and key abiotic driver in forest ecosystems. Although the ecological effects of light itself is well studied, capturing the complex parameters that constitute the whole light environment remain an intricate research ...
Bernard W. T. Coetzee, Layla vanZyl
doaj   +1 more source

Infrared horizon sensor modeling for attitude determination and control: Analysis and mission experience [PDF]

open access: yes
The work performed by the Attitude Determination and Control Section at the National Aeronautics and Space Administration/Goddard Space Flight Center in analyzing and evaluating the performance of infrared horizon sensors is presented.
Lee, T. H.   +3 more
core   +1 more source

Structures observed on the spot radiance fields during the FIRE experiment [PDF]

open access: yes
Three Spot images taken during the FIRE experiment on stratocumulus are analyzed. From this high resolution data detailed observations of the true cloud radiance field may be made.
Desbois, Michel   +2 more
core   +1 more source

Multi-Criteria Optimization of Tubular Daylighting Devices for Classrooms in High-Solar Climates through Parametric Simulation

open access: yesJournal of Daylighting
In educational architecture, particularly in high-solar climates, achieving a balance between ample daylight and visual comfort is a significant challenge.
Fatima Zohra Ferahta, Mourad Dahmani
doaj   +1 more source

Determination of aerosol content in the atmosphere [PDF]

open access: yes
This investigation is designed to demonstrate the feasibility of determining the aerosol content in the atmosphere from contrast measurements of ground features, and from radiance measurements.
Griggs, M.
core   +1 more source

Estimating radiant flux of nighttime light images from NASA’s Black Marble product

open access: yesGeo-spatial Information Science
Recently, radiant flux has been proved as a more accurate measure of nighttime light (NTL) compared to radiance. To estimate radiant flux of NTL from nighttime light images accurately, we propose a practical methodology that considers the anisotropy of ...
Xi Li, Bingqing Sun, Hanrui Cao
doaj   +1 more source

An Approach to Retrieve BRDF from Satellite and Airborne Measurements of Surface-Reflected Radiance Based on Decoupling of Atmospheric Radiative Transfer and Surface Reflection [PDF]

open access: yes
Bi-directional Reflection Distribution Function (BRDF) defines anisotropy of the surface reflection. It is required to specify the boundary condition for radiative transfer (RT) modeling.
Radkevich, Alexander
core   +1 more source

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