Authors: Judge, D.L., D.R. McMullin, H.S. Ogawa, D. Hovestadt, M. Hilchenbach, E.
Moebius, L.R. Canfield, R. Watts, M. Khne, and P. Wurz
Reference: AGU Spring 1996 Meeting May 20-24 Baltimore Maryland, USA
Paper no. SH32A-03: Poster
Abstract:
Absolute solar EUV irradiance measurements in an 80 A band centered
about the solar He II 304 A emission and the irradiance within the aluminum
band-pass have been obtained with a transmission grating spectrometer aboard
the Solar and Heliospheric Observatory (SOHO) satellite launched December 2,
1995. The data from the Solar EUV Monitor (SEM) provide the flux required to
determine the photoionization rate of in-flowing interstellar He. This
ionized He is the primary source of the He pick-up ions which are carried out
to the solar wind termination shock where they are accelerated becoming the
anomalous cosmic rays. The first SOHO/SEM observations will be presented.