Image

Inner Corona

Total solar eclipse of 2002 December 4 was several months after the maximum of 23rd eleven-year solar cycle and therefore the coronal structure is very complicated. The coronal structure is changing during the eleven-year solar cycle significantly. It is spread approximately evenly to all spatial directions near solar cycle maximum (for example eclipses 1990, 1999, 2001). The structure is completely different near solar cycle minimum when the coronal intensity is much greater in equatorial plane than in polar regions (for example eclipses 1994, 1995).

 
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ImageSe2002m_cor.jpg
Date04. 12. 2002
TimeSecond contact: 06:18:26 UT, third contact 06:19:34 UT
Eclipse duration 1 min 8 s
PlaceSouth Africa, Messina, High School Eric Louw
Coordinate30° 00' E, 22° 23' S, altitude approx. 1500 m
ConditionsGood, in the end of totality thin clouds
OpticsZeiss 10/1000 mm
Resolution6.72 arc sec / pixel (image on this Web page)
FilmFujicolor Reala 100
Processing16 different images were used for image creation. Images were aligned by means of phase correlation technique and then processed using Corona 3.0 software. Final processing was done by ACC 6.0 image analyzer.
Image processing by Miloslav Druckmüller
ScannerNikon Super Coolscan 4000 ED (4000dpi, 16× multisample)
SoftwarePhaseCorr 3.0, Corona 3.0, Sofo ACC 6.0
NoteThe graph above the table shows the average values of the relative number of sunspots in which the red arrow indicates the time of 2002 eclipse. Graph was created according to data from Sunspot Index Data Center, Brussels.
OrientationImage must be rotated 6.4° clockwise to achieve the standard orientation (N top, E left)
Copyright© 2004 Vojtech Rušin, Miloslav Druckmüller

 


Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
druckmuller@fme.vutbr.cz
Page last update: 19.3.2007