Image Processing of December 23 1997 LASCO CME Observations

Details Image Processing of December 23 1997 LASCO CME Observations Image Processing of December 23 1997 LASCO CME Observations

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spd....28.0126k&link_type=abstract

American Astronomical Society, SPD meeting #28, #01.26; Bulletin of the American Astronomical Society, Vol. 29, p.884

Astronomy and Astrophysics

Astronomy

Scientific paper

The Large Angle Spectrometric Coronagraph (LASCO) onboard SOHO contains three individual coronagraphs, C1, C2, and C3, that image the solar corona from 1.1 R_sun to 32 R_sun. Since January 1996, LASCO has detected a number of CMEs. Starting on December 23 1996 several spectacular CME events were observed with all LASCO coronagraphs. The onset was detected with both EIT and LASCO/C1 instruments. The images of the developing CMEs contain many complex components with different spatial scales and a wide range of contrast levels. Spatial and temporal characterization of these structures is extremely important for understanding the origin and the early evolution of CMEs. To extract information on the low contrast small-scale structures in the CMEs we applied image processing techniques to several time sequences of images. Our study of the movies made from these contrast and/or resolution enhanced images leads to a better knowledge of the morphology and temporal evolution of the small scale structures, especially at the onset of the CME as observed with the C1 and EIT. LASCO is a cooperative project of an international group of scientists at the Naval Research Laboratory, Washington, DC, the Max-Planck Institut fur Aeronomie, Germany, the Laboratoire d'Astronomie Spatiale, France, and the Space Research Group at the University of Birmingham, Great Britain.

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