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 Samy A. Khalil;A. H. Hassan;U. Ali Rahoma;A. Abulwfa;Ashraf S. Khamees

作者机构：National Research Institute of Astronomy and Geophysics Helwan Egypt 

出 版 物：《Open Journal of Applied Sciences》 (应用科学（英文）)

年 卷 期：2021年第11卷第3期

页      面：294-311页

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

主　　题：Solar Radiation Components Annular Solar Eclipse Color Portion Transparency and Link and Angstrom Turbidity 

摘      要：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 21st, 2020 in Helwan, Egypt (Lat. 29.866°N and Long. 31.20°E) has been made. A pyrheliometer for measuring the direct solar radiation, in three different bands;direct yellow (Y), direct red (R), direct infrared (IR), and also the total direct band (I);A pyranometers for measuring the different components of global solar radiation (G), global ultraviolet (GUV), global infrared (GIR) 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 (Ispan style=wh