Self-Correcting Atmosphere-Surface Optical Radiation Characteristic Observer

Abstract

The invention discloses a self-correcting atmosphere-earth surface optical radiation characteristic observer comprising an optical system and an electronic system. The optical system comprises an integrating sphere, an earth surface reflection observation lens, three light splitting detection units, and a spectrum scaler. An upper light incoming hole of the integrating sphere is used to observe the incoming of the sky light, and a lower light incoming hole is connected with the earth surface reflection observation lens for the observation of the earth surface reflection. The two light incoming holes of the integrating sphere are provided with switchable light blocking plates, and a light shielding plate is disposed in the integrating sphere. The light outlet hole of the integrating sphere is provided with an optical fiber bundle, and the incoming light can be reflected by the built-in light shielding plate after entering the integrating sphere, and then can be led in the three light splitting detection units by the optical fiber bundle disposed on the light outlet hole; the spectrum scaler is disposed in the earth surface reflection observation lens in an integrated manner, and then the corresponding relation between the detection spectrum and the pixel can be detected periodically. The spectrum matching error and the system error of the devices of the conventional measuring way can be prevented, and the on-site observation precision and the radiation transmission calculating precision can be obviously improved.

Description

technical field [0001] The invention belongs to the field of optical radiation measurement and the field of remote sensing science, in particular to a self-correcting atmosphere-surface optical radiation characteristic observer. Background technique [0002] Atmospheric optical radiation characteristics and surface reflected radiation characteristics are important parameters in scientific fields such as climate change research, remote sensor radiation calibration, and remote sensing applications. [0003] Surface reflected radiation characteristics are characterized by ground reflectance. The traditional ground reflectance measurement adopts the method of measuring the relative diffuse reflection reference plate, that is, the artificial handheld spectroradiometer measures the ground and the reference plate respectively, and compares the two to obtain the ground reflectance. The degree of automation of this measurement method is low, and the instrument and reference board ca...

AI Technical Summary

Problems solved by technology

The degree of automation of this measurement method is low, and the instrument and reference board cannot be detected and corrected in time due to changes in the external environment

[0004] Atmospheric optical characteristics are calculated and characterized by the observation results of direct solar spectral irradiance, sky light diffuse irradiance / total irradiance, and are usually observed by one or more spectral radiation instruments. Due to the lack of spectral self-calibration, Instrument attenuation self-calibration function, it is difficult to maintain long-term stability

[0005] In the past, the measurement of atmospheric optical radiation characteristics and surface reflection characteristics required the observation of multiple spectral radiation instruments. The measurement process is complex, the degree of automation is low, the instrument does not have self-calibration function, and the measurement accuracy is low.

At the same time, when the ground observation results are used for radiative transfer calculations, different instruments are used for ground reflectance observations and atmospheric radiation characteristics observations, resulting in spectral mismatch and the accumulation of system errors of the instruments, which increases the uncertainty of the calculation results

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