Image

White-light corona and SOHO EIT 30.4 nm image

At the eclipse beginning and at the end, chromospheric features like prominences and spicules are visible. The same structures are visible on SOHO EIT images taken on the wavelength of 30.4 nm (He II), which makes precise alignment with eclipse images very easy. The correspondence of the mentioned structures is absolutely perfect. The dark areas near both solar poles are those parts of the corona which were invisible from our observing place during the whole totality.
Click on the image or on the following reference to display the higher resolution image version (3.6 MB, PNG format).

ImageTse2006l_1640_eit304.jpg
Date29. 03. 2006
Time2nd contact 10:35:39 UT, 3rd contact 10:39:38 UT
SOHO image 10:40:12 UT
PlaceLibya
Coordinate30° 56.946' N, 24° 14.301' E, 158 m altitude
ConditionsExcellent - clear sky, altitude of the Sun above the horizon 62°
Optics16.4/1640mm (Takahashi 100 mm ED, focal length 820 mm with Canon 2× teleconverter)
CameraCanon EOS 5D digital camera (ISO 100)
Exposure1/1000 s - 4 s
ProcessingComposition of 60 eclipse images and SOHO EIT He II 30.4 nm image. Eclipse images were aligned by means of phase correlation, composed by means of LDIC 4.0 software, processed using Corona 4.0 in order to visualize coronal structures. Final processing including alignlent with SOHO image was done using ACC 6.0 software.
Image processing by Miloslav Druckmüller
SoftwarePhaseCorr 4.0, Corona_ret 2.0, LDIC 4.0, Corona 4.0, Sofo ACC 6.0 with Match II module
OrientationImage must be rotated 24.258° anti-clockwise to achieve standard orientation i. e. North up.
Copyright© 2006 Miloslav Druckmüller, Peter Aniol, ESA/NASA
 


Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
druckmuller@fme.vutbr.cz
Page last update: 24.8.2008