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Proceedings Paper

Determination of the CA-K index by video-spectrometric measurements
Author(s): Rolf Werner
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Paper Abstract

The importance of the EUV/UV variations for the earth atmosphere is the starting point in this work. Some aspects of the changes in the solar EUV/UV irradiation and the reaction of the earth atmosphere are discussed. It is pointed out that for experiments and modeling of the atmosphere reactions UV proxies are necessary. One of this proxy parameter is the Call-K index. A very good correlation was found for it with the L(alpha ) and the solar flux in the spectral range of 140 nm up to 200 nm. The Call-K indexes are determined by solar observations. It is necessary to take in consideration the aerosol scattering in order to determine in the plane. A new proposal for the Call-K index determination is made which strongly depends on the spectrum influence of the aerosol scattering, the change of the instrument sensitivity and the instrument offset. It is planned to prove this proposal by Call-K line measurements.

Paper Details

Date Published: 7 May 1999
PDF: 5 pages
Proc. SPIE 3571, Tenth International School on Quantum Electronics: Laser Physics and Applications, (7 May 1999); doi: 10.1117/12.347643
Show Author Affiliations
Rolf Werner, Solar-Terrestrial Influences Lab. (Bulgaria)

Published in SPIE Proceedings Vol. 3571:
Tenth International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Dimitar V. Stoyanov, Editor(s)

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