Physics
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jbis...43..181p&link_type=abstract
British Interplanetary Society, Journal (ISSN 0007-084X), vol. 43, April 1990, p. 181-184.
Physics
Mission Planning, Soho Mission, Solar Corona, Ultraviolet Spectrometers, High Resolution, Satellite Instruments, Solar Interior, Solar Temperature, Solar Wind, Stellar Structure
Scientific paper
The scientific background of the Solar and Heliospheric Observatory (SOHO) mission, a joint operation of NASA and ESA planned for 1995, is given, and the main goals of the mission are defined. Two out of three fundamental problems addressed, such as the existence and heating of the solar corona, and causes and locations of the solar-wind stream acceleration, will be examined by the major SOHO instrument, the coronal diagnostic spectrometer (CDS). The CDS is designed to obtain the intensity ratios of selected diagnostic line-pairs in the EUV, at spatial and temporal resolutions appropriate to the fine scale features of the solar atmosphere. Its design is a hybrid instrument, with an astigmatic grazing incidence spectrometer to access the important coronal line below 300 A and a stigmatic normal incidence spectrometer to view the lines larger than 300 A.
Harrison Richard A.
Patchett B. E.
Sawyer Eric C.
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