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REMOTE SENSING FOR LAND & RESOURCES    2015, Vol. 27 Issue (1) : 92-99     DOI: 10.6046/gtzyyg.2015.01.15
Technology Application |
Improvement and application effect of water vapor moving signal extraction algorithm in "clear sky region" from FY-2E infrared channel
ZHAO Hang1,2, WANG Zhenhui1,2, YANG Lu1,2, ZHAN Yizhe1,2, TANG Min1,2
1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China
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Abstract  

The quadratic difference method, as an improved water vapor signal extraction algorithm, is employed in "clear sky region" from FY-2E infrared channel. By means of both split window and temporal difference calculation from infrared cloud mask images, the method can weaken the surface temperature interference and help trace the weak signal of water vapor in "clear sky region", regardless of the order of the two calculations. Application examples show that this method can trace the weak signal of water vapor in "clear sky region" more effectively and make up for the lacking wind field data in clear sky with high water vapor content values as compared with the obvious limitation of deriving cloud motion wind by the traditional method. A comparison between the wind fields using this technique and that obtained from the NCEP reanalysis data shows a good relative accuracy.

Keywords Wenchuan great earthquake      earthquake secondary geological disasters      airborne remote sensing      distribution regularity      development tendency analysis     
:  TP79  
Issue Date: 08 December 2014
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WEI Yongming
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WEI Yongming,WEI Xianhu,CHEN Yu. Improvement and application effect of water vapor moving signal extraction algorithm in "clear sky region" from FY-2E infrared channel[J]. REMOTE SENSING FOR LAND & RESOURCES, 2015, 27(1): 92-99.
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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2015.01.15     OR     https://www.gtzyyg.com/EN/Y2015/V27/I1/92
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