首页 >  , Vol. , Issue () : 1993-2002

摘要

引用本文:

DOI:

10.11834/jrs.20209122

收稿日期:

2019-04-29

修改日期:

2019-07-14

PDF Free   EndNote   BibTeX
基于Himawari-8/AHI的一种改进的火点检测算法的研究
鄢俊洁, 瞿建华
华云星地通科技有限公司
摘要:

对Himawari-8卫星的3.9μm和11.2μm两通道进行了连续时相变化研究,根据对一天周期内的晴空条件下的不同纬度的地表的亮温变化研究,得出两通道的亮温在时间上的变化差值稳定且规律明显。根据维恩定律,当有火点发生时,3.9μm通道在时相上的亮温变化明显,其亮温会迅速升高;而11.2μm通道亮温变化较缓。基于以上研究,结合Himawari-8高观测频次的特点,提出了适用于晴空条件下的改进的火点检测算法。该算法根据两通道在时相上的变化特点,考虑白天可见光对3.9μm通道的影响,结合火点出现时引起的亮温变化特征,可快速有效的获取火点的信息。在多处进行了此算法的实验,例如2018年11月27日16:40(UTC时)河北张家口市桥东区一化工厂附近发生的严重爆炸起火事件以及2019年2月28日澳大利亚西南部发生的火灾事件,运用改进的火点检测算法均快速有效的提取到了火点。结果显示,该算法能很好的进行火点检测,并能解决晨昏交界、冰雪下垫面、常规火源点、太阳耀光等火点检测的难题。

An Improved Fire Detection Algorithm for Himawari-8 /AHI
Abstract:

This paper describes an improved fire detection algorithm based on the continuous phase change of the 3.9 μm and 11.2 μm measurements by satellite Himawari-8. According to the results on the brightness temperature change of different latitude under clear sky conditions in one day,it is concluded that the brightness temperature change is stable and obvious. When the fire happens, the brightness temperature of 3.9 μm channel changes rapider than 11.2 μm channel between two continuous ten minutes. An improved fire detection algorithm is proposed based on this change studies, and considers the visible spectra effect on the 3.9 μm channel during the day time. Experiments with this algorithm have been carried out in several places, such as the serious explosive fire near a chemical plant in Qiaodong District, Zhangjiakou City, Hebei Province, at 16:40 (UTC) on November 27, 2018 and a fire incident in southwestern Australia on February 28, 2019, and the improved fire detection algorithm was used to quickly and effectively extract the fire points. The results show that the algorithm can perform fire detection well, and can solve the fire detection on snow, during twilight, sunglint and so on.

本文暂时没有被引用!

欢迎关注学报微信

遥感学报交流群 分享按钮