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(EUV Snapshot Imaging Spectrograph)
(EUV spectrograph for solar corona observation)

ESIS (for EUV Snapshot Imaging Spectrograph) is an extreme ultraviolet (EUV) spectrograph for observing the solar corona. It is an outgrowth of the effort to produce another such spectrograph MOSES (for Multi-Order Solar EUV Spectrograph), offering additional wavelength range. Both perform their observation from sounding rockets.

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solar physics