Device for measuring albedo of multi-channel narrow-waveband wave spectrum

Abstract

The invention discloses a device for measuring an albedo of a multi-channel narrow-waveband wave spectrum. The device comprises a shell, and an upward observation sensor and a downward observation sensor which are arranged on the top and at the bottom of the shell, respectively, wherein each of the upward observation sensor and the downward observation sensor comprises a cosine corrector, a filter and a detector; in the upward observation sensor, the cosine corrector, the filter and the detector are sequentially arranged from top to bottom; in the downward observation sensor, the cosine corrector, the filter and the detector are sequentially arranged from bottom to top. The device can precisely measure the albedo of the narrow-waveband wave spectrum which has the same response as that of a satellite sensor wave spectrum and supply direct checking equipment and data to inspection of a satellite product; the cosine correctors adopted by the invention can effectively reduce the cosine errors of the sensors. The device comprises the upper sensor and the lower sensor which are integrated; the equipment can be simplified; waterproofing and mounting are facilitated.

Description

Technical field [0001] The invention relates to a multi-channel narrow-band spectrum albedo measuring device, which belongs to the field of meteorological observation and radiation energy balance. Background technique [0002] The surface albedo is the ratio of the solar shortwave radiation reflected in all directions to the total solar radiation. It determines the distribution process of radiant energy between the earth's surface and the atmosphere, which in turn affects the ecosystem such as surface temperature, transpiration, energy balance, photosynthesis and A series of physical, physiological and biochemical processes such as respiration are the prerequisites for accurately estimating other land surface parameters. [0003] The existing ground measurement equipment for albedo is mainly a short-wave wide-band radiometer, which uses two horizontally installed short-wave wide-band radiometers, one upward and one downward, to measure the broad-band solar and environmental downwar...

AI Technical Summary

Problems solved by technology

[0004] When using satellite observation data to estimate the surface albedo, since the satellite sensors are generally multiple narrow channels and multi-band settings with a relatively narrow band range of tens to hundreds of nanometers, only the corresponding band can be estimated according to the satellite albedo algorithm The narrow-band spectral surface albedo can not be directly compared with the wide-band surface albedo measured on the ground

Therefore, in remote sensing product verification, it is necessary to compare the spectral albedo estimated by satellite sensors with the wide-band albedo measured on the ground after conversion from narrow-band to wide-band. This conversion process will introduce errors, thus have an impact on the verification results

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