首页 >  , Vol. , Issue () : -

摘要

全文摘要次数: 247 全文下载次数: 392
引用本文:

DOI:

10.11834/jrs.20219176

收稿日期:

2019-06-01

修改日期:

2020-10-18

PDF Free   EndNote   BibTeX
Himawari-8静止气象卫星时序法火点探测方法研究
陈洁
国家卫星气象中心
摘要:

摘要: 随着新一代静止气象卫星的发射,高频次和高时效的观测特性对于火点探测具有独特优势。本文研究目的为基于Himawari-8新一代静止气象卫星高频次观测特点,提出有利于火情初期火点判识的时序探测方法。与传统的极轨气象卫星遥感火情监测采用的上下文法不同,时序探测法判识火点的方法依据为探测像元亮温在观测时间上的差异。研究结果显示,在无云及无异常热源条件下,相邻时次中红外亮温差异较小,当前后时次亮温差达到3K时,可判识出火点,而上下文法的阈值均在6K以上,时序法的火点判识阈值较上下文法明显降低,探测相应的亚像元火点面积减小一倍以上,从而提高了火情判识的灵敏度,实现火点早期发现。本文介绍了时序法火点判识方法,并以黑龙江桦川县的星地同步观测实验进行验证,研究表明,时序法较上下文法在初发火点探测灵敏度方面有明显优势,时序法和上下文法的结合可提高气象卫星对火情发展过程的监测能力。

Study on the method of temporal sequence for fire spot detection by using Himawari-8 geostationary meteorological satellite
Abstract:

Abstract: With the launch of a new generation of geostationary meteorological satellites, the characteristics of high frequency and real-time observation have obvious advantages for fire spot detection. Based on the high frequency observation characteristics of Himawari-8 that a new generation geostationary meteorological satellite, the objectives of this paper proposes a temporal sequence detection method to extract the initial fire spot of fire behavior. The method of study is based on the pixel temperature brightness difference in observation times and its rate, which is different from the conventional contextual method used in remote sensing fire monitoring of polar orbit meteorological satellites. The results showed that under the condition of cloud-free and no abnormal heat source, the mid-infrared bright temperatures have little difference between the adjacent times. When the bright temperature rate between the current time and later time reaches 3K, the fire spot can be identified, while the threshold of contextual method is above 6K. The fire spot detection threshold of the temporal sequential method is significantly lower than that of the contextual method. This paper introduces the method of temporal sequence for fire spot detection, and verifies it with the satellite and ground synchronous observation experiment in Huachuan county, Heilongjiang province. The conclusion demonstrated that this method is benefit to find early fire spot. The combination of the temporal sequence method and the fluctuation of contextual can improve the meteorological satellite monitoring ability of fire development process.

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