Precision evaluation method and system for remote sensing estimation of surface sensible heat/latent heat flux

A latent heat flux and accuracy evaluation technology, applied in the direction of measuring heat, calorimeters, measuring devices, etc., can solve problems such as inaccurate verification results and mismatching spatial representation ranges
CN104406715AInactive Publication Date: 2015-03-11CHONGQING SURVEY INST +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHONGQING SURVEY INST
Publication Date
2015-03-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a precision evaluation method and system for remote sensing estimation of surface sensible heat / latent heat flux. The method comprises the following steps: S1, observing the surface by a surface flux observation instrument to obtain reference surface sensible heat / latent heat flux data, and obtaining remote sensing surface sensible heat / latent heat flux data from a remote sensing product; S2, creating a Footprint model by data obtained by the surface flux observation instrument in the step S1, setting footprint grid resolution, working out the Footprint model to obtain a flux-source area for observing the surface sensible heat / latent heat flux, and performing normalization computing to obtain the flux contribution rate of each footprint grid; S3, performing weighted average calculation to obtain a remote sensing estimation value; S4, comparing the remote sensing estimation value with the actual measurement value of the ground. According to the method, the remote sensing product is subjected to precision evaluation by the observation value of a ground instrument, so that the precision and reliability of the remote sensing product can be guaranteed and the reliance of a user on the remote sensing product can be improved.
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Description

technical field

[0001] The invention relates to the technical field of verification of remote sensing products, in particular to a precision evaluation method and system for remote sensing estimation of surface sensible / latent heat flux. Background technique

[0002] For surface sensible heat and latent heat flux, the remote sensing estimation results are arranged in pixels, and the size of each pixel is fixed. On the other hand, the flux values ​​observed by ground instruments, the size and position of the spatial range represented by them are not fixed, and are generally related to the height of the instrument, wind direction and speed, atmospheric stability, and the condition of the underlying surface, etc., and will continue to change over time. . Therefore, in the process of verification, there is a problem of mismatching of spatial representative ranges, and it is impossible to make one-to-one correspondence on the pixel scale. At present, for the verification of sur...

Claims

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