Method for demarcating and measuring whole atmosphere spectrum transmittance

• Main Authors: ZHANG SILONG, HUANG SHENG, TAN FENGFU, HE FENG, HOU ZAIHONG
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2017
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for demarcating and measuring whole atmosphere spectrum transmittance. Based on a feature that the same solar radiation meter theoretically remains unchanged to absolute calibration coefficients of different light sources, a demarcation channel with a high signal to noise ratio is searched by analyzing the characteristics of atmospheric parameters and system own hardware parameters, and then a Langley method and a standard light source method are combined to perform the demarcation. By use of the method disclosed by the invention, a radiation standard is tracked back to solar spectral irradiance at the top of the atmosphere in a whole spectrum range, measurement errors in the laboratory demarcation process is reduced, and the demarcation precision is improved. 种标定测量整层大气光谱透过率的方法，本发明基于同台太阳辐射计对不同光源的绝对定标系数理论上保持不变这特征，通过分析大气参数及系统自身硬件参数的特点，寻找信噪比较高的标定通道，然后将Langley法与标准光源法结合起来进行标定。本方法将辐射基准在整个光谱范围内溯源到大气层顶的太阳光谱辐照度，减小了实验室标定过程中的测量误差，提高了标定精度。