FengYun-3 B Satellite Medium Resolution Spectral Imager Visible On-Board Calibrator Radiometric Output Degradation Analysis
| العنوان: | FengYun-3 B Satellite Medium Resolution Spectral Imager Visible On-Board Calibrator Radiometric Output Degradation Analysis |
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| المؤلفون: | Yanna Zhang, Wei Wei, Tanqi Yu, Xiaobing Zheng, Dandan Zhi, Ling Sun, Xin Li, Yan Pan |
| المصدر: | IEEE Transactions on Geoscience and Remote Sensing. 57:3240-3251 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Detector, 0211 other engineering and technologies, 02 engineering and technology, Tracking (particle physics), Wavelength, Calibration, General Earth and Planetary Sciences, Environmental science, Radiometry, Satellite, Electrical and Electronic Engineering, Radiometric calibration, Shortwave, 021101 geological & geomatics engineering, Remote sensing |
| الوصف: | The output of the FengYun-3 B (FY-3B) satellite’s medium resolution spectral imager (MERSI) visible on-board calibrator (OBC) degrades with time, causing concerns regarding its reliability in radiometric calibration. Special efforts have been made to extract the variation in information of the interior lamps. The specifications include: 1) digital count retrieval from the OBC files and an exponential plus linear fit applied to determine the relative change in the MERSI response; 2) anchoring to cross calibration with MODIS to acquire the absolute radiometric calibration coefficients; 3) a time series calibration tracking method based on the pseudoinvariant target site applied to monitor the degradation of the FY-3B MERSI instrument; and 4) “net” interior lamp radiometric output (ILRO) obtained by subtracting long-term pseudoinvariant tracking results from the scaled visible on-board calibrator-based model gain coefficients. The results show that the decay rates of the ILRO are wavelength dependent and the shortwave outputs are found to experience a large degradation, particularly at 470, 550, 412, 443, 490, 520, and 565 nm. The largest annual degradation rate is greater than 15% in the first year. The implementation of the current procedure combined with a detailed analysis will provide a basis for further determining lamp changes, leading to improved absolute calibration accuracy of MERSI products. |
| تدمد: | 1558-0644 0196-2892 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::96ebf9201c7623f313754d01955f9536 https://doi.org/10.1109/tgrs.2018.2882858 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........96ebf9201c7623f313754d01955f9536 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15580644 01962892 |
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