Performance of Incoming Solar Radiation Components in Partial Annular Solar Eclipse on June 21<sup>st</sup>, 2020 in Helwan, Egypt

• 作者: Samy A. Khalil A. H. Hassan U. Ali Rahoma A. Abulwfa Ashraf S. Khamees
• 来源期刊: 应用科学(英文)
• 学科: 数学
• 关键词: Solar Radiation Components Annular Solar Eclipse Color Portion Transparency and Link and Angstrom Turbidity
• 年，卷（期）: 2021,（3）
• 页码范围: 294-311
• 页数: 18页
• 分类号: O17

摘要

<span style="white-space:normal;">Observing and studying the solar radiation during solar eclipses is important in knowing the changes that occur to the environmental elements during this event. The main objective of this paper is the performance of the incoming variation of solar radiation components, global, direct and diffuse and their fractions during the partial annular solar eclipse on June 21</span><sup style="white-space:normal;">st</sup><span style="white-space:normal;">, 2020 in Helwan, Egypt (Lat. 29.866</span>&#176;<span style="white-space:normal;">N and Long. 31.20</span>&#176;<span style="white-space:normal;">E) has been made. A pyrheliometer for measuring the direct solar radiation, in three different bands;direct yellow (</span><em style="white-space:normal;">Y</em><span style="white-space:normal;">), direct red (</span><em style="white-space:normal;">R</em><span style="white-space:normal;">), direct infrared (</span><em style="white-space:normal;">IR</em><span style="white-space:normal;">), and also the total direct band (</span><em style="white-space:normal;">I</em><span style="white-space:normal;">);A pyranometers for measuring the different components of global solar radiation (</span><em style="white-space:normal;">G</em><span style="white-space:normal;">), global ultraviolet (</span><em style="white-space:normal;">G_UV</em><span style="white-space:normal;">), global infrared (</span><em style="white-space:normal;">G_IR</em><span style="white-space:normal;">) and a meteorological station to measure the different meteorological parameters. The duration of the solar eclipse was 01 h:59 m, and the maximum magnitude of the eclipse in this region was 0.449. The depression is clear at the solar radiation of all components due to the annular solar eclipse, while the depressions of the diffuse and global infrared solar radiation are lower. In all direct radiation compounds (</span><em style="white-space:normal;">I</em><span style="white-space:normal;">, </span><em style="white-sp