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Radiometric Performance Evaluation of FY-4A/AGRI Based on Aqua/MODIS

by 1,2, 1,2, 2,* and 2
College of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
State Key Laboratory of Remote Sensing Science, Aerospace information Research Institute, Chinese Academy of Sciences, Beijing 100101, China
Author to whom correspondence should be addressed.
Sensors 2021, 21(5), 1859;
Received: 29 January 2021 / Revised: 28 February 2021 / Accepted: 3 March 2021 / Published: 7 March 2021
(This article belongs to the Section Remote Sensors)
Fengyun-4A (FY-4A) is the first satellite of the Chinese second-generation geostationary orbit meteorological satellites (FY-4). The Advanced Geostationary Radiation Imager (AGRI), onboard FY-4A does not load with high-precision calibration facility in visible and near infrared (VNIR) channel. As a consequence, it is necessary to comprehensively evaluate its radiometric performance and quantitatively describe the attenuation while using its VNIR data. In this paper, the radiometric performance at VNIR channels of FY-4A/AGRI is evaluated based on Aqua/MODIS data using the deep convective cloud (DCC) target. In order to reduce the influence of view angle and spectral response difference, the bi-directional reflectance distribution function (BRDF) correction and spectral matching have been performed. The evaluation result shows the radiometric performance of FY-4A/AGRI: (1) is less stable and with obvious fluctuations; (2) has a lower radiation level because of 24.99% lower compared with Aqua/MODIS; 3) has a high attenuation with 9.11% total attenuation over 2 years and 4.0% average annual attenuation rate. After the evaluation, relative radiometric normalization between AGRI and MODIS in VNIR channel is performed and the procedure is proved effective. This paper proposed a more reliable reference for the quantitative applications of FY-4A data. View Full-Text
Keywords: FY-4A/AGRI; VNIR; DCC; radiometric performance; Aqua/MODIS FY-4A/AGRI; VNIR; DCC; radiometric performance; Aqua/MODIS
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MDPI and ACS Style

Zhong, B.; Ma, Y.; Yang, A.; Wu, J. Radiometric Performance Evaluation of FY-4A/AGRI Based on Aqua/MODIS. Sensors 2021, 21, 1859.

AMA Style

Zhong B, Ma Y, Yang A, Wu J. Radiometric Performance Evaluation of FY-4A/AGRI Based on Aqua/MODIS. Sensors. 2021; 21(5):1859.

Chicago/Turabian Style

Zhong, Bo, Yingbo Ma, Aixia Yang, and Junjun Wu. 2021. "Radiometric Performance Evaluation of FY-4A/AGRI Based on Aqua/MODIS" Sensors 21, no. 5: 1859.

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