Results 31 to 40 of about 5,686 (263)
A fitted radiance and attenuation model for realistic atmospheres
, 2021 We present a fitted model of sky dome radiance and attenuation for realistic terrestrial atmospheres. Using scatterer distribution data from atmospheric measurement data, our model considerably improves on the visual realism of existing analytical clear ...
Rittig, Tobias +7 more
core +1 more source
Sand-Dust Image Restoration Based on Reversing the Blue Channel Prior
IEEE Photonics Journal, 2020 Images acquired under sand-dust weather conditions are severely degraded, with low contrast and severe color shift. The reason is that, due to the influence of sand-dust particles, light is scattered and absorbed, resulting in a blurred image and low ...
GuXue Gao +4 more
doaj +1 more source
Changes in the surface irradiance during the total solar eclipse 2020 in Valcheta, Argentina
Papers in Physics, 2023 On December 14, 2020, southern South America experienced a total solar eclipse close to the solar noon. The path of totality, about 90 km wide, extended over the continental region from the Chilean west coast to the Argentine east coast, passing through
Pablo Facundo Orte +9 more
doaj +1 more source
Short- and long-term variability of spectral solar UV irradiance at Thessaloniki, Greece: effects of changes in aerosols, total ozone and clouds [PDF]
Atmospheric Chemistry and Physics, 2016 In this study, we discuss the short- and the long-term variability of spectral UV irradiance at Thessaloniki, Greece, using a long, quality-controlled data set from two Brewer spectrophotometers.
I. Fountoulakis +6 more
doaj +1 more source
Nomograms for estimating clear-sky zenith atmospheric attenuation in range 80–130 GHz
Electronics Letters, 1973 Two nomograms are presented for estimating the zenith attenuation of radio waves, due to oxygen and water vapour in a cloudfree atmosphere, in the region 80 to 130 GHz, for a range of climatic conditions.
openaire +1 more source
Chiral Phase Change Nanomaterials
Advanced Functional Materials, EarlyView.This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow +11 more
wiley +1 more source
Rooftop Photovoltaic Energy Production Estimations in India Using Remotely Sensed Data and Methods
Remote Sensing, 2023 We investigate the possibility of estimating global horizontal irradiance (GHI) in parallel to photovoltaic (PV) power production in India using a radiative transfer model (RTM) called libRadtran fed with satellite information on the cloud and aerosol ...
Anil Kumar +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.A dye‐based photoinitiator acting as a structure‐directing element, guides the formation of a cholesteric polymer network that behaves as a chirped photonic structure with dissipative chiral coupling. Photopolymerization freezes a depth‐dependent helical pitch, broadening the Bragg resonance spectrum.
Alfredo Mazzulla +2 more
wiley +1 more source
Performance Assessment of a High-Capacity 120 Gbps Hybrid WDM-Based FSO Link in Weather-Impaired Environments [PDF]
E3S Web of ConferencesIn this study, the design and performance analysis of the high-capacity WDM 120Gbps system in the FSO link have been discussed to assess its performance at varying atmospheric conditions.
Ghazi Alaan +7 more
doaj +1 more source
Forecasting, 2020 Direct Normal Irradiance (DNI) predictions obtained from the Integrated Forecasting System of the European Centre for Medium-Range Weather Forecast (IFS/ECMWF) were compared against ground-based observational data for one location at the south of ...
João Perdigão +3 more
doaj +1 more source