A Simple Method for Converting 1-km Resolution Daily Clear-Sky LST into Real LST [PDF]
Remote Sensing, 2020 Land-surface temperature (LST) plays a key role in the physical processes of surface energy and water balance from local through global scales. The widely used one kilometre resolution daily Moderate Resolution Imaging Spectroradiometer (MODIS) LST ...
Yunfei Zhang +3 more
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Cloud Detection Method Based on All-Sky Polarization Imaging [PDF]
Sensors, 2022 Sky cloud detection has a significant application value in the meteorological field. The existing cloud detection methods mainly rely on the color difference between the sky background and the cloud layer in the sky image and are not reliable due to the ...
Wunan Li +4 more
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Evidence of linear relationships between clear‑sky indices in photosynthetically active radiation and broadband ranges [PDF]
Meteorologische ZeitschriftThis study provides empirical relationships between photosynthetically active radiation (PAR) and broadband clear‑sky indices at ground level for both the PAR global irradiance and its direct component.
William Wandji Nyamsi +4 more
doaj +2 more sources
Towards the intrahour forecasting of direct normal irradiance using sky-imaging data [PDF]
Heliyon, 2018 Increasing power plant efficiency through improved operation is key in the development of Concentrating Solar Power (CSP) technologies. To this end, one of the most challenging topics remains accurately forecasting the solar resource at a short-term ...
Julien Nou +4 more
doaj +2 more sources
A generative hidden Markov model of the clear-sky index [PDF]
Journal of Renewable and Sustainable Energy, 2019 Clear-sky index (CSI) generative models are of paramount importance in, e.g., studying the integration of solar power in the electricity grid. Several models have recently been proposed with methodologies that are related to hidden Markov models (HMMs).
Mahmoud Shepero +2 more
openaire +4 more sources
Clear Sky Index : Framtagen med enkortsdator och webbkamera [PDF]
, 2015 A future sustainable society need to rely more on renewable energy sources. One of the most promising alternatives is solar power. However, there are inherent fluctuations accompanied with solar power, for example if the shadow of a cloud blocks the sun light on a whole solar cell it will not produce any power.
Enström, Oskar +2 more
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Contribution of Land Surface Temperature (TCI) to Vegetation Health Index: A Comparative Study Using Clear Sky and All-Weather Climate Data Records [PDF]
Remote Sensing, 2018 The Vegetation Health Index (VHI) is widely used for monitoring drought using satellite data. VHI depends on vegetation state and thermal stress, respectively assessed via (i) the Vegetation Condition Index (VCI) that usually relies on information from ...
Virgílio A. Bento +3 more
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On a Probability Distribution Convolution Approach to Clear-Sky Index and a Generalized Ångström Equation [PDF]
We show that by modeling solar beam irradiance approximately as a simple Bernoulli distribution and diffuse irradiance as a Gamma distribution, a generalized Ångström equation relating solar irradiation to sunshine hours follows directly as aconsequence of the convolution of beam and diffuseirradiance distributions into a distribution for the clear-sky
Munkhammar, Joakim, Widén, Joakim
core +6 more sources
Effect of sky clearness index on transmission of evacuated (vacuum) glazing [PDF]
Renewable Energy, 2017 Glazing transmittance variation with clearness index has higher influence than incident angle for soar energy application. This work presents variation of vacuum glazing transmittance with clearness index. Clearness index and transmittance was calculated from measured one year (2014) solar radiation and glazing transmittance data in Dublin, Ireland ...
Ghosh, Aritra +2 more
openaire +4 more sources
Clouds over Hyytiälä, Finland: an algorithm to classify clouds based on solar radiation and cloud base height measurements [PDF]
Atmospheric Measurement Techniques, 2020 We developed a simple algorithm to classify clouds based on global radiation and cloud base height measured by pyranometer and ceilometer, respectively.
I. Ylivinkka +11 more
doaj +1 more source