A Simulation Method of Land Surface Temperature with Spatial Continuity

Abstract

The invention discloses a ground surface temperature simulation method with spatial continuity, belonging to the technical field of remote sensing simulation, comprising the following steps: (1) calculating the slope, slope direction, and sunlight incident angle of each pixel by using time and space data; 2) Determine the short-wave reflectivity, long-wave emissivity, and thermal conductivity of each pixel according to the classification map; (3) determine the radiation amount and atmospheric parameters of each pixel; (4) utilize the step (1)-(3) Determined parameters, according to the one-dimensional heat balance equation considering the longitudinal heat transfer, solve the surface temperature of each pixel; (5) on the basis of the one-dimensional heat balance equation in step (4), add adjacent pixels in the horizontal direction to the target image The horizontal conduction heat flux of each pixel is used to construct a three-dimensional heat balance equation, and the corrected surface temperature of each pixel is solved. Compared with similar methods, this method introduces horizontal heat conduction and considers the influence of spatial continuity on temperature simulation, which is suitable for thermal infrared remote sensing research.

Description

[0001] (1) Technical field [0002] The invention relates to a ground surface temperature simulation method with spatial continuity, which belongs to the technical field of remote sensing simulation and is suitable for the research of thermal infrared remote sensing. [0003] (2) Background technology [0004] Thermal infrared remote sensing generally refers to remote sensing whose working band is limited to the infrared band, and its working band is generally between 0.76-1000μm. For all matter, as long as its temperature is higher than absolute zero, it will emit infrared radiation to the outer space. The thermal radiation of an object is related to the temperature and composition of the material inside. Therefore, all objects in space will exchange energy through thermal radiation. When the external radiation energy absorbed by an object is equal to the radiation energy emitted by itself to the outside world, the object is in a state of thermal equilibrium. For general obj...

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Problems solved by technology

At present, in terms of heat transfer, it is generally considered that the earth’s surface is a semi-infinite object, and the heat conduction process is simplified to a one-dimensional longitudinal heat conduction model, and the temperature is solved through the longitudinal heat balance equation without considering the horizontal heat conduction in the horizontal direction. There is a lack of spatial continuity, and it does not have the conditions to generate a spatially continuous surface temperature distribution map for thermal infrared remote sensing services

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