Comparative analysis of application effects of three cloud parameters of FY-4A in a rainstorm case

• Published in: 暴雨灾害 Vol. 41; no. 4; pp. 396 - 404
• Main Authors: Ming WANG, Yingying CHEN, Yuquan ZHOU, Qi LI
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Torrential Rain and Disasters 01.08.2022
• Subjects: cloud parameters; deviation; fy-4a; modis; retrival
• ISSN: 2097-2164
• DOI: 10.3969/j.issn.1004-9045.2022.04.004

The parameters of cloud macro-and microphysical characteristics (referred to as "cloud parameters") are important basis for cloud and precipitation analysis. Aiming at an extreme rainstorm event that occurred in Hubei province on June 27, 2020, the original data of three band and three cloud parameter products of FY-4A were selected to compare with spatio-temporally coincident MODIS data. The results show that: (1) Compared with the narrow spectrum of MODIS, the spectral response function of the FY-4A satellite generally has a wider band. At the center band of the three channels, there is a certain offset in position between the two. (2) Judging from the original data, the plane distribution modes of the two satellites are relatively consistent. The reflectivity of FY-4A in the visible band is generally lower than that of MODIS, with a correlation coefficient of 0.91 and an average deviation of-0.07. The reflectivity of FY-4A in the near-infrared band is nearly 40% larger than MODIS, with an average deviation