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Land surface temperature inversion method based on TASI data

A surface temperature and data technology, applied in the field of land surface temperature inversion based on TASI data, can solve the problem of low accuracy of surface temperature values, achieve the effect of improving numerical accuracy and inversion accuracy

Active Publication Date: 2019-10-29
北京绿土科技有限公司 +1
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low accuracy of the currently detected surface temperature value, and provide a land surface temperature inversion method based on TASI data, which can improve the numerical accuracy of the surface temperature when applied

Method used

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  • Land surface temperature inversion method based on TASI data
  • Land surface temperature inversion method based on TASI data
  • Land surface temperature inversion method based on TASI data

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Embodiment

[0030] Such as figure 1 As shown, the land surface temperature retrieval method based on TASI data includes the following steps in sequence: Step 1, obtain the TASI image of the study area; Step 2, preprocess the TASI data; Step 3, compare the temperature with the surface specific radiation rate separation; step 4, establish a temperature inversion model, and use the temperature inversion model to obtain the surface temperature. Wherein, in this embodiment, preprocessing is performed on TASI data, which is implemented sequentially through relative radiation correction and atmospheric correction.

[0031] The relative radiometric correction in the preprocessing process includes the following steps: first, the on-board calibration system is used to process the TASI image, and then the image-based statistical method is used to realize the relative radiometric correction, and then the bands with low signal-to-noise ratio of the TASI data are checked. The band is treated with radi...

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Abstract

The invention discloses a land surface temperature inversion method based on TASI data, which comprises the following steps of S1, acquiring a TASI image of a research area, and successively preprocessing the TASI data by means of relative radiation correction and atmospheric correction; S2, separating the temperature from the surface emissivity; and S3, establishing a temperature inversion modelbased on a surface emissivity spectral curve and an atmospheric upward and downward radiation curve, and using the temperature inversion model to obtain the surface temperature. The land surface temperature inversion method improves the inversion precision by utilizing the relationship characteristics between the intrinsic bands and associated region between the intrinsic bands and the soil emission spectrum feature, thereby improving the surface temperature numerical precision.

Description

technical field [0001] The invention relates to a land surface temperature monitoring technology, in particular to a land surface temperature inversion method based on TASI data. Background technique [0002] Surface temperature is a very important characteristic physical quantity that characterizes changes in surface processes, and is a direct driver of surface-atmosphere energy exchange. It is widely used in research fields such as surface energy balance, climate change, and resource and environment monitoring. Surface temperature is a key parameter in the study of global change, and it is of great significance to hydrology, ecology and other research. The accuracy of surface temperature retrieval will greatly affect the accuracy of surface parameters and the effectiveness of related remote sensing applications. At present, the temperature retrieved by remote sensing thermal infrared is limited by the complexity of land surface types and insufficient observation informatio...

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Application Information

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IPC IPC(8): G01J5/00
CPCG01J5/007G01J2005/0077G01J5/804
Inventor 王建华常睿春
Owner 北京绿土科技有限公司
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