Optical initial radiation intensity calibration method, device and system

Abstract

The invention relates to the field of atmospheric optics, and specifically relates to an optical initial radiation intensity calibration method, device and system. The method comprises the steps: obtaining an earth-sun distance correction factor and relative air mass at a moment of measurement, and a voltage value of light, with a given wavelength, outputted through a measurer when the relative air mass is within at least one measurement section, wherein the maximum difference between the maximum value and the minimum value of the relative air mass in the measurement section is two; carrying out reciprocal transformation of the relative air mass corresponding to the voltage value outputted by the measurer; and employing a least square regression algorithm to calculate a calibrated voltage value in each measurement section according to the Beer-Lambert law, the voltage value of light, outputted through a measurer, with the given wavelength, the relative air mass after reciprocal transformation and the earth-sun distance correction factor at the moment of measurement. The method can reduce the measurement requirements of calibration, can complete measurement in a short time, reduces the measurement errors, and improves the practicability of measurement.

Description

technical field [0001] The invention relates to the field of atmospheric optics, in particular to a method, device and system for calibrating the initial radiation intensity of light. Background technique [0002] At present, the research on the optical properties of the whole atmosphere aerosol is playing an increasingly important role in many disciplines, such as climate change, laser communication, and laser transmission through the atmosphere. When measuring the optical parameters of the entire atmosphere, such as the transmittance of the entire atmosphere and the optical thickness of aerosols, the Lambert-Beer law (the basic law of light absorption) is generally used, which states that the intensity of radiation transmitted through an extinction medium follows an exponential function Attenuation, whose independent variable is the integral of the extinction coefficient to the distance of the transmission path. When measuring and inverting based on this law, it is necessa...

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Problems solved by technology

But in fact, it is very difficult to meet the above-mentioned measurement conditions required by the calibration method. The two are constantly changing with the rotation and revolution of the earth and the atmosphere itself. The longer the measurement time, the worse the stability of the atmosphere. , the greater the error of the final measurement result is

Therefore, the practicability of this method for calibration is poor

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