Inner Corona and SOHO EIT 30.4 nm Image Composite (version 2)

This second version of the composite image has its origin in the same images as the first one but there is a difference in the used composition method. The resulting image on this page is the sum of the same two images but the overlapping part of images contains information from both ones. It makes easier to follow the structures but it is not possible to distinguish on which image the structure was visible.
Click on the image or on the following reference to display the higher resolution image version (4.4 MB, PNG format).

Date21. 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
ProcessingSum of 8 images enhanced by means of adaptive kernel convolution and in subpixel accuracy composed with SOHO EIT 30.4 nm He II image taken at 12:38:44 UT.
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)
NoteSOHO EIT image file name: efz20010621_123844.fts
OrientationImage has the standard orientation (N top, E left)
Copyright© 2001 Úpice Observatory, © 2001 ESA/NASA, © 2003 Miloslav Druckmüller


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