Computer Science
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.292..582r&link_type=abstract
Nature, vol. 292, Aug. 13, 1981, p. 582-584.
Computer Science
Coronagraphs, Satellite-Borne Instruments, Solar Flares, Solar Maximum Mission, Ultraviolet Spectrometers, X Ray Imagery, Coronal Loops, Gamma Ray Spectrometers, H Alpha Line, Irradiance, Polarimeters, Radiometers, Solar Flux, X Ray Spectroscopy
Scientific paper
The most significant results of the Solar Maximum Mission Satellite's seven experiments are presented. These are: (1) the coronograph/polarimeter, which showed that estimates of total flare energies based solely on observed radiative fluxes can be mistaken by up to several orders of magnitude; (2) the ultraviolet spectrometer and polarimeter, which demonstrated that although the pre-flare state resembles a small loop of emerging flux rising into an overlying complex of magnetic loops, the detailed evolution of loop brightening and plasma motion does not do so; (3) the soft X-ray polychromator, which showed that line widths are strongly variable during the course of a flare, starting with rather broad profiles and narrowing significantly after the hard X-ray impulsive event; (4) the hard X-ray imaging spectrometer, which showed emission regions characterized by a hard spectrum to be spatially associated with, and to overlie, the brightest H-alpha emission patches; (5) the hard X-ray burst spectrometer, which detected persistent intensity fluctuations significant down to the 100 msec level and spectral variability down to a time scale of seconds; (6) the gamma ray spectrometer, whose data impose a non-trivial constraint on particle acceleration mechanisms anticipated at the time of the Skylab Solar Flare workshop; and (7) the active cavity radiometer irradiance monitor, which demonstrated fluctuations of the total solar irradiance at the 0.05 per cent level.
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