Visible-shortwave infrared hyperspectral irradiance instrument for long-term automatic observation

Abstract

The invention discloses a visible-shortwave infrared hyperspectral irradiance instrument for long-term automatic observation. The visible-shortwave infrared hyperspectral irradiance instrument is composed of an optical system, a mechanical system, and an electronics system. The optical system is composed of an integrating sphere, a light guide fiber, three light-splitting detection units, and a solar tracking module. The upper end of the integrating sphere is opened and the opened upper end is used for receiving light radiation from a hemisphere space; and the periphery of a light entrance of the integrating sphere is sealed and protected by a quartz-glass hemispherical cover. A fiber beam is arranged at a light-emitting hole of the integrating sphere and is connected with the integrating sphere and the three light-splitting detection units. The solar tracking module is used for realizing full-automatic precise tracking on the sun; and the full-automatic precise tracking is completed by two steps of programmed controlling pre-tracking and four-quadrant active precise tracking. The instrument uses a two-dimensional rotary table and a four-connecting-rod mechanism to track the sun precisely, so that automatic measurement of total illumination of the sky and diffusion illumination can be realized. The instrument can be applied outdoors for long time and is capable of tracking the sun automatically and sending measurement data by CAN bus equipment.

Description

technical field [0001] The invention relates to the field of spectral irradiance measuring instruments, in particular to a visible-short-wave infrared hyperspectral irradiance instrument which can be used for long-term automatic observation. Background technique [0002] The irradiance-based method is one of the important methods for field calibration. Because other methods of field calibration (such as reflectance-based method) need to make certain assumptions on the selected aerosol model when calculating radiative transfer, while the irradiance-based method can reduce the uncertainties introduced by these assumptions. [0003] With the expansion of the satellite's working band, the increase of the number of channels and the spectral resolution, the field irradiance observation in the past has limited the application range due to factors such as low degree of automation and low spectral resolution. Aiming at the requirements of the irradiance base method in the high-reso...

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Problems solved by technology

[0005] SUMMARY OF THE INVENTION The object of the present invention is to provide a visible-short-wave infrared hyperspectral irradiance meter that can be used for long-term automatic observation, so as to solve the problem of automation in the measurement of total illuminance, diffuse illuminance, direct illuminance and diffuse total time in the prior art. Problems with low, low spectral resolution

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