Outer Corona Structure - SOHO LASCO C2, C3 Composite

SOHO LASCO C3 coronograph makes possible to extend ground based image composed with SOHO LASCO C2 image up to 30 solar radii. Ground based image and both original SOHO images were processed by means of Corona 2.0 software before they were merged into one resulting image. The bright extremely overexposed object in the right part of the image is Jupiter.
Click on the image or on the following reference to display the higher resolution image version (951 KB, 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
Resolution56 arc sec / pixel - full resolution image version
FilmKodak Ektachrome 100 S Professional
ProcessingSum of 8 images enhanced by means of adaptive kernel convolution (color image) composed with SOHO LASCO C2 image taken at 12:34:14 UT and C3 image taken at 12:28:12 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 LASCO C2 image file name 2096643.fts, C3 image file name 32071629.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