Observations of the solar corona with a high resolution EUV imaging spectrograph

Computer Science – Sound

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Extreme Ultraviolet Radiation, Plasma Acceleration, Solar Corona, Solar Wind Velocity, Ultraviolet Spectrometers, High Resolution, Rocket-Borne Instruments, Solar Flares, Sounding Rockets

Scientific paper

An extreme ultraviolet imaging spectrograph was used to obtain coronal observations with high spectral and spatial resolution. The imaging properties of the instrument enable measurements of spectral line shapes and positions in discrete spatial elements of a region, so that the dynamic characteristics of the coronal plasma, as well as the distribution of emission measure with temperature and well known density diagnostics, can be studied for specific features. The instrumentation is described and several results of a sounding rocket flight on 5 May 1989, when the corona over NOAA Region 5464 including emission over the umbra of the region's largest sunspot and the pre-impulsive phase emission of a small flare was recorded, are summarized.

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