Attenuation Tracking of FY-3B/MERSI Based on Ocean Sun Glint
HU Xiu-qing1, 2, 3, HE Xing-wei1, 2, 3*, HE Yu-qing4, JIANG Meng-die4, CHEN Wei5
1. National Satellite Meteorological Center (National Center for Space Weather), China Meteorological Administration, Beijing 100081, China
2. Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081, China
3. Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, Beijing 100081, China
4. School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
5. School of Geosciences and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China
Abstract：This study focuses on the on-orbit attenuation tracking problem of FY-3B/MERSI. Ocean surface sun glints are adopted as stable targets to track the attenuation from 2011 to 2018. Based on cloud-free and effective sun glint area data, the 865 nm band is regarded as the benchmark band; the ratios between other bands' reflectance and the benchmark band's reflectance are calculated to analyze the attenuations of these bands during the 8 years. There are obvious degradations for all FY-3B/MERSI bands, especially for shortwave bands. The annual degradation rate of 412 nm is 7.12%, while the corresponding value is 0.28% for the 765 nm band. The degradation is much bigger for the 1 030 nm band, at around 3.88%. Furthermore, the reflectance ratios between different bands and benchmark bands show obvious oscillation, consistent with the north-south periodic change of latitude at the center of the sun glint. Ocean surface sun glints are an effective target for the inter-band radiometric calibrations, and could help track the long-term attenuation of on-orbit sensors.
胡秀清，何兴伟，何玉青，姜梦蝶，陈 伟. 基于海面耀斑观测的FY-3B中分辨率光谱成像仪在轨衰减跟踪研究[J]. 光谱学与光谱分析, 2025, 45(08): 2373-2379.
HU Xiu-qing, HE Xing-wei, HE Yu-qing, JIANG Meng-die, CHEN Wei. Attenuation Tracking of FY-3B/MERSI Based on Ocean Sun Glint. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2025, 45(08): 2373-2379.
[1] Urabe T, Xiong X X, Hashiguchi T, et al. Remote Sensing, 2020, 12(1): 69.
[2] Cao S, Danielson B, Clare S, et al. ISPRS Journal of Photogrammetry and Remote Sensing, 2019, 149: 132.
[3] Barnes R A, Eplee Jr R E, Schmidt G M, et al. Applied Optics, 2001, 40(36): 6682.
[4] Rast M, Bezy J L, Bruzzi S. International Journal of Remote Sensing, 1999, 20(9): 1681.
[5] GU Xing-fa, TIAN Guo-liang, YU Tao, et al(顾行发，田国良，余 涛，等). Principles and Methods of Radiometric Calibration for Aerospace Optical Remote Sensors(航天光学遥感器辐射定标原理与方法). Beijing: Science Press(北京：科学出版社), 2013.
[6] Dinguirard M, Slater P N. Remote Sensing of Environment, 1999, 68(3): 194.
[7] Chang T, Diaz C P, Shrestha A, et al. Journal of Applied Remote Sensing, 2021, 15(2): 024506.
[8] CHEN Lin, XU Na, HU Xiu-qing, et al(陈 林, 徐 娜, 胡秀清, 等). Spectroscopy and Spectral Analysis, 2016, 36(8): 2639.
[9] Goldberg M, Ohring G, Butler J, et al. Bulletin of the American Meteorological Society, 2011, 92(4): 467.
[10] CHEN Lin, ZHANG Peng, WU Rong-hua, et al(陈 林, 张 鹏, 吴荣华, 等). National Remote Sensing Bulletin(遥感学报), 2018, 22(2): 211.
[11] Sun J Q, Xiong X X, Barnes W L, et al. IEEE Transactions on Geoscience and Remote Sensing, 2007, 45(7): 2383.
[12] WU Rong-hua, ZHANG Peng, YANG Zhong-dong, et al(吴荣华，张 鹏，杨忠东，等). National Remote Sensing Bulletin(遥感学报), 2016, 20(2): 278.
[13] Staylor F W. Journal of Atmospheric & Oceanic Technology, 1990, 7(3): 411.
[14] Rao C R N, Chen J. International Journal of Remote Sensing, 1995, 16(11): 1931.
[15] JING Xin, YAN Lei, HU Xiu-qing, et al(景 欣, 晏 磊, 胡秀清, 等). Journal of Infrared and Millimeter Waves, 2017, 36(6): 694.
[16] Kaufman Y J, Holben B N. International Journal of Remote Sensing, 1993, 14(1): 21.
[17] Hagolle O, Nicolas J M, Fougnie B, et al. IEEE Transactions on Geoscience and Remote Sensing, 2004, 42(7): 1472.
[18] Sun L, Gao L, Cao D Y, et al. Proceedings of SPIE, 2018, 10631: 1063116.
[19] Sun L, Hu X Q, Guo M H, et al. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(12): 4929.
[20] Sun L, Li X J. Proceedings of SPIE, 2014, 9298: 929800.
