The Large Angle Spectroscopic Coronagraph (LASCO): Visible light coronal imaging and spectroscopy

Details The Large Angle Spectroscopic Coronagraph (LASCO): Visible light coronal imaging and spectroscopy The Large Angle Spectroscopic Coronagraph (LASCO): Visible light coronal imaging and spectroscopy

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.348...27b&link_type=abstract

In ESA, Proceedings of the First SOHO Workshop: Coronal Streamers, Coronal Loops, and Coronal and Solar Wind Composition p 27-34

Computer Science

4

Coronagraphs, Fabry-Perot Interferometers, High Resolution, Onboard Data Processing, Satellite-Borne Instruments, Soho Mission, Solar Corona, Solar Observatories, Spectroscopy, Data Compression, European Space Programs, Image Processing, Microprocessors, Nasa Space Programs, Remote Sensing

Scientific paper

The Large Angle Spectroscopic Coronagraph (LASCO) is a triple coronagraph being jointly developed for the Solar and Heliospheric Observatory (SOHO) mission. LASCO comprises three nested coronagraphs (C1, C2, and C3) that image the solar corona for 1.1 to 30 solar radii (C1: 1.1 to 3 solar radii, C2: 1.5 to 6 solar radii, and C3: 3 to 30.0 solar radii). The inner coronagraph (C1) is a newly developed mirror version of the classic Lyot coronagraph without an external occultor, while the middle coronagraph (C2) and the outer coronagraph (C3) are externally occulted instruments. High resolution coronal spectroscopy from 1.1 to 3 R solar radii can be performed by using a Fabry-Perot interferometer, which is part of C1. High volume memories and a high speed microprocessor enable extensive onboard image processing. Image compression by factors of 10 to 20 will result in the transmission of 10 to 20 full images per hour.

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