Results 21 to 30 of about 96,800 (307)
Remote Sensing, 2019 Reflectance and vegetation indices obtained from aerial images are often used for monitoring crop fields. In recent years, unmanned aerial vehicles (UAVs) have become popular and aerial images have been collected under various solar radiation conditions.
Naoyuki Hashimoto +3 more
doaj +1 more source
Environmental Research Letters, 2020 Increased deployment of solar farms in the last decade is coincident with continued monitoring of surface spectral reflectances by the moderate resolution imaging spectroradiometers (MODIS) aboard NASA Aqua satellite.
Chongxing Fan, Xianglei Huang
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Optical Control of Solar Sails using Distributed Reflectivity [PDF]
Spacecraft Structures Conference, 2014 The dynamics of solar sails with a variable surface reflectivity distribution are investigated. When changing the reflectivity across the sail film, which can be achieved using electro-chromic coatings, the solar radiation pressure forces and torques across the sail film can be controlled without changing the attitude of the spacecraft relative to the ...
Borggräfe, A. +3 more
openaire +2 more sources
Remote Sensing, 2016 The Visible Infrared Imaging Radiometer Suite (VIIRS) onboard Suomi National Polar Orbiting Partnership (SNPP) uses a solar diffuser (SD) as its radiometric calibrator for the reflective solar band calibration.
Xi Shao, Changyong Cao, Tung-Chang Liu
doaj +1 more source
EVALUATION OF THE RADIOMETRIC ACCURACY OF IMAGES OBTAINED BY A SEQUOIA MULTISPECTRAL CAMERA [PDF]
Engenharia Agrícola, 2020 Geometric and radiometric corrections of images obtained by remotely piloted aircraft systems (RPAS) are required for the measurement of the spectral reflectance and calculation of vegetation indices.
Alison A. D. Teixeira +4 more
doaj +1 more source
Reflective type Solar-LCDs by using polarizing polymer solar cells
Optics Express, 2012 We present herein the results of a study of the reflective polarizing photovoltaic (PV) effects in an aligned polymer bulk-heterojunction PV layer. The PV layer consisted of a composite of regioregular poly(3-hexylthiophene) and methanofullerene (P3HT:PCBM) and the fairly uniform in-plane alignment of the P3HT:PCBM PV layer was achieved by means of a ...
Yoon Ho, Huh +3 more
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingSurface reflectance varies with changes in solar and viewing angles, exhibiting distinct anisotropic reflectance characteristics, which can be characterized using the bidirectional reflectance distribution function (BRDF).
Qianrui Xi +7 more
doaj +1 more source
Energies, 2021 More and more attention is being paid to the solar reflectance of built-up surfaces due to its influence on the summer heating of buildings and urban areas and the consequent effects on energy needs for air conditioning, as well as on the peak load of ...
Sofia Costanzini +3 more
doaj +1 more source
Reflection hologram solar spectrum-splitting filters [PDF]
SPIE Proceedings, 2012 In this paper we investigate the use of holographic filters in solar spectrum splitting applications. Photovoltaic (PV) systems utilizing spectrum splitting have higher theoretical conversion efficiency than single bandgap cell modules. Dichroic band-rejection filters have been used for spectrum splitting applications with some success however these ...
Zhang, Deming +6 more
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Mg-Ni-H films as selective coatings: tunable reflectance by layered hydrogenation [PDF]
, 2004 Unlike other switchable mirrors, Mg2NiHx films show large changes in reflection that yield very low reflectance (high absorptance) at different hydrogen contents, far before reaching the semiconducting state.
B. Dam +7 more
core +3 more sources