The Large Angle Spectroscopic Coronagraph (LASCO)

Details The Large Angle Spectroscopic Coronagraph (LASCO) The Large Angle Spectroscopic Coronagraph (LASCO)

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995soph..162..357b&link_type=abstract

Solar Physics, Volume 162, Issue 1-2, pp. 357-402

Physics

955

Sun, Corona, Coronagraph

Scientific paper

The Large Angle Spectroscopic Coronagraph (LASCO) is a three coronagraph package which has been jointly developed for the Solar and Heliospheric Observatory (SOHO) mission by the Naval Research Laboratory (USA), the Laboratoire d'Astronomie Spatiale (France), the Max-Planck-Institut für Aeronomie (Germany), and the University of Birmingham (UK). LASCO comprises three coronagraphs, C1, C2, and C3, that together image the solar corona from 1.1 to 30 R&sun; (C1: 1.1 3 R&sun;, C2: 1.5 6 R&sun;, and C3: 3.7 30 R&sun;). The C1 coronagraph is a newly developed mirror version of the classic internally-occulted Lyot coronagraph, while the C2 and C3 coronagraphs are externally occulted instruments. High-resolution imaging spectroscopy of the corona from 1.1 to 3 R&sun; can be performed with the Fabry-Perot interferometer in C1. High-volume memories and a high-speed microprocessor enable extensive on-board image processing. Image compression by a factor of about 10 will result in the transmission of 10 full images per hour.

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