Chromosphere, Prominences and Inner Corona

Even if the chromosphere and the prominences are not as bright (in visible light) as the solar photosphere is they are still bright enough to be impossible to obtain good image of the chromosphere, the prominences and the inner corona in a single film frame. On the contrary human vision manages easily this task. Again it is necessary to combine several images taken with various expositions. One image of the chromosphere and the prominences taken shortly after the second contact was composed with eight images sum processed by means of adaptive kernel convolution using Corona 2.0 software.
Click on the image or on the following reference to display the higher resolution image version (5.0 MB, PNG format).

Date 21. 06. 2001
TimeSecond contact 12:36:34 UT, third contact 12:41:10 UT
Total eclipse duration 4 min 36 s
PlaceAngola, near Sumbe (Ngunza)
CoordinateS 11° 07' 29'', E 13° 55' 51'', Alt. 168 m
ConditionsExcellent, clear sky
OpticsMertz - II, 1875/100 mm (VOD Turnov), siderostat off-axis configuration
CameraPENTAX 67 II, 6 × 7.5 cm format
Resolution2.629 arc sec / pixel - full resolution image version
FilmKodak Ektachrome 100 S Professional
ProcessingComposite of 9 images enhanced by means of adaptive kernel convolution
Image processing by Miloslav Druckmüller
ScannerNikon LS 8000 (4000dpi resolution, RGB, 3 × 16 bit/pixel)
SoftwareSofo ACC 5.0 Scientific Image Analyzer with Match II Module (final processing)
Corona 2.0 Analyzer (coronal structure enhancement)
PhaseCorr 2.0 Analyzer (rotation estimation - registration of images)
OrientationImage has the standard orientation (N top, E left)
Copyright© 2001 Úpice Observatory, © 2003 Miloslav Druckmüller


Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
Page last update: 19.3.2007