Shadow bands during the total solar eclipse of 26 February 1998

Physics

Scientific paper

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Scientific paper

We have recorded shadow bands just before and just after the total phase of the solar eclipse of 26 February 1998, using four silicon photodiodes on the corners of a square 105 mm side. At two earlier eclipses, 11 July 1991, 3 November 1994, recordings were made using two silicon photodiodes separated by 100 mm. The analyses of these earlier eclipses have already been published in detail, and therefore here we concentrate on the analysis of the recordings made on 26 February 1998. Samples of the time series are presented, along with cross-correlation functions and power spectra. The power spectra are broadly in accord with the shadow band theory of Codona (Codona, C., 1986. The scintillation theory of eclipse shadow bands. Astron. Astrophys. 164, 415-427). This is also the case for the two earlier eclipses, but there are instructive differences between the three occasions.

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