SUMER Participation in the International Global Sun Month Campaign

D. M. Hassler, K. Wilhelm, P. Lemaire, U. Schuehle

Global Sun Month was an international campaign to study the solar minimum corona with synoptic observations from SOHO, as well as other spacecraft and ground-based observatories from around the world. SUMER (Solar Ultraviolet Measurements of Emitted Radiation) participated in this campaign with synoptic observations at the poles and at the coronal hole/streamer interface in four different emission lines formed at four different temperatures and heights in the atmosphere. One of the overall goals of the SUMER portion of this campaign is to constrain physical quantities such as density, temperature, and nonthermal velocity in various structures of the solar minimum corona important to generation of the solar wind. We present preliminary observations from this campaign with sample composite images obtained with SUMER in the emission lines of O V 630 A, N V 1238 A, Mg X 625 A, and Fe XII 1242 A formed over a range of temperatures corresponding to several heights in the solar transition region and corona.

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