Measurements of the solar spectrum between 30 and 128Å

The results of two rocket flights of grazing incidence monochromators designed to measure solar line intensities in the wavelength region between 30 and 128 Å are compared. One of these flights sampled a very quiet Sun, that of November 3, 1965, and has been reported previously. The other acquired data during a more active, but non-flaring, interval on August 8, 1967. Improvements in the data reduction techniques have led to a refinement in the former data, and these improvements together with instrumental changes provided increased resolution in the results from the latter flight. The changes in line intensities observed in these two experiments follow a pattern which is in general qualitative agreement with theoretical ionization equilibrium calculations for the solar corona. An analysis of these and other observations of the CVI L line suggests that this line is particularly sensitive to local solar activity.