@article{3018813,
    title = "Measurements of the spectral components of direct normal solar radiation over Athens",
    author = "Sakellariou, N. and Asimakopoulos, D. and Eutax1as, G. and Kalamatianou, A. and Varotsos, C.A. and Katsikis, S.",
    journal = "International Journal of Remote Sensing",
    year = "1995",
    volume = "16",
    number = "10",
    pages = "1815-1827",
    issn = "0143-1161, 1366-5901",
    doi = "10.1080/01431169508954521",
    keywords = "solar radiation;  spectral component, Greece, Athens",
    abstract = "The spectral composition of direct solar radiation and its long-term trends for the period 1963-1990 over Athens have been studied. Measurements were made with the use of QRT, OG1, RG2 and RG8 Schott glass fillers, allowing the division of the solar spectrum into 4 bands. The percentage of direct normal solar irradiance was found to increase in the wavelength regions under 630 nm and to decrease in the regions with longer wavelengths. © 1995 Taylor & Francis Group, LLC."
}