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Short-Wave Solar Radiation in the Earth’s Atmosphere Part 4

Đánh giá của sự không chắc chắn (độ lệch chuẩn) của các phép đo trong không khí của các loại đặc tính không chắc chắn không chắc chắn nguồn bức xạ có hệ thống ngẫu nhiên hệ thống hệ thống quan sát hệ thống ngẫu nhiên. | 84 Spectral Measurements of Solar Irradiance and Radiance in Clear and Cloudy Atmospheres Table 3.1. Evaluation of the uncertainty standard deviation of airborne measurements of the radiative characteristics Uncertainty source Uncertainty type Observations which the uncertainty influences Uncertainty estimation Displacement of the Systematic All observations 1 nm wavelength scale Random All observations 1 nm Deviation from the cosine dependence Systematic The irradiance observations Look at Fig. 3.1 Calibration Systematic All observations 15 within UV 10 within VD and NIR K-3 spectrometer Random All observations 5 within UV 1 within VD and NIR Aircraft pitch Systematic Observations of the downwelling irradiance in the clear atmosphere 5 within UV 10 within VD and NIR for the azimuths 0 and 180 Aircraft bumps Random Observations of the downwelling irradiance in the clear atmosphere below the bumps level 5 within UV 10 within VD and NIR for the azimuths 90 and 270 Illumination heterogeneity Random Observations below the inhomogeneous clouds 10 Surface heterogeneity Random Observations of the upwelling radiance and irradiance below the bumps level 10 area in the field of view of the instrument is smoothing the surface heterogeneity. It is especially distinct during the upwelling irradiance observations the corresponding estimations indicated that the surface heterogeneity could be neglected if the flight altitude was higher than the bumps level. Table 3.1 concludes the reasons and estimations of the uncertainties of the airborne observations with the information-measuring system based on the K-3 instrument. Airborne Observation of Vertical Profiles of Solar Irradiance and Data Processing 85 3.2 Airborne Observation of Vertical Profiles of Solar Irradiance and Data Processing The concern of the spectral observations of solar irradiances was to calculate radiative flux divergences and it conditions both the observational scheme and the methodology of data processing. It