Temperature/emissivity inversion method suitable for ground thermal infrared data

Abstract

The invention belongs to the technical field of ground thermal infrared remote sensing information extraction, and particularly relates to a temperature / emissivity inversion method suitable for groundthermal infrared data. The method comprises the following steps: 1, selecting a to-be-measured sample and a ground thermal infrared data measuring instrument; 2, selecting a sample thermal infrared data measurement environment and time; 3, calculating atmospheric downlink radiant heat infrared radiance data; 4, acquiring thermal infrared radiance data of the sample; 5, selecting a sample temperature distribution range; 6, calculating black body thermal infrared radiance data; 7, calculating emissivity values of the sample at different temperatures; 8, calculating the emissivity curve smoothness of the sample at different temperatures and determining the real temperature; 9, calculating the emissivity value of the sample at the real temperature. The method can accurately invert the groundobject temperature and emissivity information based on the ground thermal infrared remote sensing data, and provides an important technical means for the fields of exploration of uranium, polymetallicand other mineral resources, environmental monitoring, target identification and the like.

Description

technical field [0001] The invention belongs to the technical field of ground thermal infrared remote sensing information extraction, and in particular relates to a temperature / emissivity inversion method suitable for ground thermal infrared data. Background technique [0002] Infrared radiation is the most widespread thermal radiation in nature and can be acquired by thermal infrared detection instruments. As long as the surface temperature of an object is above absolute zero, it will continuously radiate energy outward. The energy radiated by objects can be expressed as a function of the object's own temperature and its spectral emissivity. Emissivity is an important characteristic physical quantity of objects. Like fingerprints, each object has its own unique spectral emission characteristics, which can be It is used to identify different types of minerals and rocks and other ground objects; temperature data is an important parameter to reflect the earth-atmosphere inter...

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Problems solved by technology

Although the above-mentioned instruments can accurately measure the thermal radiation brightness value of ground features, the skin temperature that determines the thermal infrared radiation intensity of ground features is the heat balance process between the surface and the interior of the surface through thermal radiation, turbulent heat exchange, and water vapor heat exchange. Comprehensive reflection, it is difficult to accurately obtain the surface temperature of ground objects without destroying the thermal balance with the existing technical means

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