Physics
Scientific paper
Aug 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jatp...58.1309j&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, Vol. 58, No. 12, p. 1309 - 1316
Physics
2
Earth Atmosphere: Scintillations, Earth Atmosphere: Solar Eclipses, Solar Eclipses: 1994 November 3
Scientific paper
The author recorded shadow bands just before and just after the total phase of the solar eclipse of 3 November 1994. The recordings were made using two broad-band silicon photodiodes separated by 100 mm. They were mounted on a plate that faced the eclipsed Sun, which was at an altitude of 32.4° as seen from the observing site 4500 m above sea level between Putre and Lake Chungara in northern Chile. The irradiance fluctuations associated with the shadow bands were around 0.008 W m-2 rms on a background of about 2-8 W m-2. The cross-correlation function indicates that the shadow bands were moving at a speed of about 1.8 m s-1 perpendicular to their extent. The power spectral density functions are in accord with the shadow band theory of Codona (1986). The author carried out a similar experiment in Baja California during the eclipse of 11 July 1991. In spite of the considerable differences between the two circumstances, the results on the two occasions are broadly similar.
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