Physics
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988sohi.rept...31w&link_type=abstract
In ESA, The SOHO Mission. Scientific and Technical Aspects of the Instruments p 31-37 (SEE N90-13302 04-92)
Physics
1
Extreme Ultraviolet Radiation, Solar Heating, Solar Radiation, Solar Spectrometers, Solar Wind, Helioseismology, Solar Magnetic Field, Solar Observatories
Scientific paper
The SUMER (solar ultraviolet measurements of emitted radiation) experiment is described. It will study flows, turbulent motions, waves, temperatures and densities of the plasma in the upper atmosphere of the Sun. Structures and events associated with solar magnetic activity will be observed on various spatial and temporal scales. This will contribute to the understanding of coronal heating processes and the solar wind expansion. The instrument will take images of the Sun in EUV (extreme ultra violet) light with high resolution in space, wavelength and time. The spatial resolution and spectral resolving power of the instrument are described. Spectral shifts can be determined with subpixel accuracy. The wavelength range extends from 500 to 1600 angstroms. The integration time can be as short as one second. Line profiles, shifts and broadenings are studied. Ratios of temperature and density sensitive EUV emission lines are established.
Axford Wiliam Ian
Curdt Werner
Gabriel Alan H.
Grewing Michael
Huber Martin C. E.
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