Abstract
IT is a well-established fact that the intensity distribution within the auroral spectrum is subject to considerable variations. In 1923 one of us (Vegard) found that the negative nitrogen bands as compared with the strong green line were considerably enhanced with increasing altitude.
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References
L. Vegard, Geophya. Publ, 10, No. 4, 48 (1933). L. Vegard and E. Tønsberg, Z. Phys., 88, 718 (1934).
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VEGARD, L., TØNSBERG, E. Enhancement of Red Lines and Bands in the Auroral Spectrum from a Sunlit Atmosphere. Nature 137, 778–779 (1936). https://doi.org/10.1038/137778b0
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DOI: https://doi.org/10.1038/137778b0
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