Method and device for measuring solar subdivided spectral irradiance with high precision

Abstract

The invention discloses a method and a device for measuring the solar subdivided spectral irradiance with high precision. The device comprises a prism spectrometer, and the prism spectrometer is rotationally arranged on a two-dimensional rotating table and comprises a shell; a solar tracker is fixed outside the shell and is electrically connected with an external control device; and the external control device is used for controlling the two-dimensional rotating table to drive the prism spectrometer to rotate and align to the sun according to the feedback signal of the solar tracker. The device has simple structure, is easy to implement and effectively solves the problem that the solar radiation observing equipment adopting the traditional technology can not meet requirement for the solar radiation observation precision. Because the device is provided with the two-dimensional rotating table, the sunlight can be tracked effectively. Because the shell of the prism spectrometer is internally provided with two sets of symmetric spectrum detecting units, the spectrum detecting units can be calibrated mutually and replaced alternatively when one of spectrum detecting units is damaged.

Description

technical field [0001] The invention relates to the field of optical radiation measurement and the field of remote sensing science, in particular to a high-precision solar subdivision spectrum irradiance measurement method and device. Background technique [0002] Solar radiation is a decisive factor affecting Earth's atmospheric dynamics, ocean dynamics, and global energy balance, and is correlated with Earth's atmosphere and climate change. Evaluating the role of solar radiation changes in long-term global climate and environmental changes, and distinguishing it from human-influenced factors such as the greenhouse effect, requires long-term accurate observations to draw convincing conclusions. Solar radiation is closely related to the spectrum, and affects the weather process and climate change through the selective absorption and scattering of wavelengths by the atmosphere. It is of particular significance to the observation of solar subdivided spectral irradiance. [00...

AI Technical Summary

Problems solved by technology

[0003] Traditionally, the observation of solar radiation mainly focuses on the change of total irradiance, and the accuracy is also limited to a certain extent.

At present, although there are spectral solar radiation observation equipment in the field of atmospheric science and remote sensing, these equipment are not used for the observation of changes in solar radiation itself, but by observing the solar spectral radiation and the theoretical solar spectral irradiance outside the atmosphere. Relative change, used to calculate parameters such as atmospheric aerosol optical depth, there are deficiencies such as fewer spectral channels, low precision, and low stability

[0004] The relative change range of solar radiation is very small, about 0.1% in an 11-year solar cycle, which puts forward extremely high precision requirements for the observation of absolute solar irradiance, which is close to the highest level of current light radiation measurement. Traditional Advanced solar radiation observation equipment cannot meet such observation accuracy requirements

Images