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	Inter-calibration of VIRR/FY-3A/B split-window channels with AIRS/Aqua and IASI/Metop-A measurements
	Jiang G. M.; Wang, Z. Y.; Wang, J. B.
	2016
关键词	land-surface temperature infrared channels intercalibration satellite algorithm system
英文摘要	This work addressed the inter-calibration of the two split-window channels 4 and 5 (IR4, around 10.8 mu m; IR5, around 12.0 mu m) of Visible and Infrared Radiometer (VIRR) aboard FengYun 3 (FY-3) A and B satellites against the hyperspectral channels of Atmospheric Infrared Sounder (AIRS) on Aqua and Infrared Atmospheric Sounding Interferometer (IASI) on Metop-A over the Arctic area (180 degrees W-180 degrees E, 60 degrees N-90 degrees N) using the hyperspectral convolution (HSC) method in June and December of 2010-2013. First, the satellite data were re-sampled into the gridded study area using the area-weighted pixel-aggregation method. Then, besides the collocation condition, the measurements acquired by different instruments were matched with the following criteria: 1) the absolute observation time difference is less than 20 min (|.time|< 20 '), and 2) vertical bar cos theta(1) / cos theta(2) -1 vertical bar< 0.015, where theta(1) and theta(2) are the at-surface view zenith angles (VZAs) of the VIRR/ FY-3 measurement and the hyperspectral measurement, respectively. Finally, linear regression analyses on the matching measurements were carried out to obtain the inter-calibration coefficients, and re-calibrated VIRR/FY-3A/B measurements were achieved. The results showed that the calibrations of AIRS/Aqua and IASI/Metop-A channels were quiet consistent, whereas, against the hyperspectral channels, the calibrations of VIRR/FY-3A/B channels 4 and 5 were biased, and they presented certain seasonal and annual variations, especially for VIRR/FY-3A channel 4. In contrast to VIRR/FY-3A channels, the calibration discrepancies of VIRR/FY-3B channels 4 and 5 were smaller. Moreover, no obvious impact of solar illumination on VIRR/FY-3A/B measurements was observed.
出处	International Journal of Remote Sensing
卷	37
期	22
页	5249-5269
语种	英语
ISSN号	0143-1161
DOI标识	10.1080/01431161.2016.1232873
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/42729]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Jiang G. M.,Wang, Z. Y.,Wang, J. B.. Inter-calibration of VIRR/FY-3A/B split-window channels with AIRS/Aqua and IASI/Metop-A measurements. 2016.

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