High-frequency space adaptive threshold fire remote sensing monitoring method based on GK-2A

Abstract

The invention aims to mainly solve the problems that a fire remote sensing monitoring high-temporal-spatial-resolution data source is single, the accuracy of an existing monitoring method needs to be improved and the like, and provides a high-frequency spatial self-adaptive threshold high-precision fire remote sensing recognition monitoring method based on brand-new geostationary meteorological satellite GK-2A data. The fire monitoring channel is expanded, and the fire monitoring accuracy is improved. The method mainly comprises the steps of data preprocessing (GK-2A satellite data projection conversion, radiation correction, atmospheric correction and the like); marking clear sky pixels (identifying pixels in a cloud region, a water body region, a desert region and the like to mark the clear sky pixels); effective background pixel screening (dynamic screening based on underlying surface type differentiation); background pixel brightness temperature calculation; fire point pixel dynamic threshold value identification (correction coefficient self-adaptive dynamic processing based on the solar altitude and the vegetation proportion, and standard deviation self-adaptive correction based on the cloud pixel proportion); and false fire point elimination. According to the method, the channel of remote sensing fire monitoring is greatly expanded, and the accuracy of remote sensing fire monitoring is improved.

Description

technical field [0001] The invention relates to the technical field of remote sensing fire monitoring, in particular to a high-frequency space adaptive threshold fire remote sensing identification monitoring method based on GK-2A satellite data. Background technique [0002] Fire is an important factor affecting the environment and carbon cycle of terrestrial ecosystems. It changes the carbon source / sink pattern of the entire system, affects global climate change, and also seriously endangers the safety of people's lives and properties. Satellite remote sensing has become an important means of current fire monitoring. In recent years, many domestic and foreign scholars have carried out fire identification and monitoring based on many satellite data such as Terra / MODIS, Aqua / MODIS, NOAA / AVHRR, Himawari-8, and FY-3. Research; Among them, Himawari-8 satellite data is widely used in fire monitoring business due to its high temporal and spatial resolution and high data quality ad...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to focus on solving the problems of a single high-temporal-spatial-resolution data source for fire remote sensing monitoring and the need to improve the accuracy of existing monitoring methods, and provide a high-frequency space adaptive threshold based on the new static meteorological satellite GK-2A data. High-precision fire remote sensing identification and monitoring methods to expand fire monitoring channels, improve fire monitoring accuracy, and achieve high-precision remote sensing fire monitoring

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