Abstract
The measurement of the full-disk solar EUV flux summed over broad spectral bands in this region is shown to be critically dependent on the determination of the level of scattered radiation and other background. The EUV fluxes of some strong lines are reported, as are the total fluxes summed over 10-Å intervals, based on an Aerobee rocket experiment on November 9, 1971. Significant improvement in the peak-to-background ratio was achieved in the measurements below 100 Å. The present state of solar EUV measurements below 205 Å is reviewed, and a summary of the results from several Air Force Cambridge Research Laboratories experiments is presented. The use of EUV flux models scaled with the 10.7-cm solar radio flux is discussed.
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