Study on the correction of sunlight pollution in mid-infrared image of FY-3C/VIRR

被引：0

作者：

Zhu J. ^{[1
]}

Hu X. ^{[2
]}

Yang L. ^{[1
]}

Xu H. ^{[2
]}

Xu N. ^{[2
]}

Zhang P. ^{[2
]}

机构：

[1] School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo

[2] National Satellite Meteorological Centre, Beijing

来源：

National Remote Sensing Bulletin | 2021年 / 25卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Destriping; FY-3C; Solar pollution; Variational model; Visible and Infra-Red Radiometer(VIRR);

D O I：

10.11834/jrs.20209474

中图分类号：

学科分类号：

摘要：

The Visible and Infra-Red Radiometer (VIRR) sensor on FY-3C was affected by the scanning mirror of the remote sensing instrument illuminated by the sunlight at high latitude, which results in the noise of the earth observation image, and the stripe noise of the channel-3 in VIRR, which seriously affected the data application. The causes of strip noise pollution include the influence of direct sunlight near the terminator, the effect of space clamp caused by stray light formed by reflection and scattering of sunlight and the influence of temperature fluctuation of scanning mirror caused by sunlight. According to the anisotropic characteristics of the stripe noise and the unidirectional variational model, We studied the removal of stripe noise in channel 3 of VIRR, and compared the results with the low-pass filtering method and TV-L1 method. The mean cross-track profiles before and after destriping, Peak Signal to Noise Ratio (PSNR), Improvement Factors (IF) of radiation quality and Inverse Coefficient of Variation (ICV) were used to evaluate the destriping results. In addition, in order to analyze the change of solar pollution over time, we made pollution line statistics, using the data of January, April, July and October 2014-2019. The results show that the variational model had a good effect on the stripe noise caused by solar pollution in the observation data of FY-3C VIRR channel 3. In the real experiment, PSNR was increased to 32.77 db; in the real data experiment, IF was increased to 16.99 db. The results of time series analysis of solar pollution show that solar pollution has significant seasonal variation and has significant correlation with satellite β angle. © 2021, Science Press. All right reserved.

引用

页码：803 / 815

页数：12

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