The solar extreme ultraviolet between 30 and 205 Å on November 9, 1971, compared with previous measurements in this spectral region

The measurements 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-A 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 A. The present state of solar EUV measurements below 205 A 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. (AIP)

[1]  J. Higgins.  The solar EUV flux between 230 and 1220 Å on November 9, 1971 , 1976 .

[2]  L. Heroux,et al.  Improved calculations of electron densities between 110 and 300 km derived from solar EUV fluxes of August 23, 1972 , 1975 .

[3]  M. Cohen,et al.  Comment on 'Electron Densities Between 110 and 300 km Derived From Solar EUV Fluxes of August 23, 1972' , 1974 .

[4]  W. Neupert,et al.  Slowly varying component of extreme ultraviolet solar radiation and its relation to solar radio radiation , 1974 .

[5]  W. E. Behring,et al.  Solar coronal line profiles in the extreme-ultraviolet , 1974 .

[6]  J. E. Manson.  Light source and filters for use in the 130-280-a region. , 1973, Applied optics.

[7]  L. Malinovský,et al.  An Analysis of the Solar Extreme-Ultraviolet Between 50 and 300 A , 1973 .

[8]  Leonard Cohen,et al.  The solar spectrum - Wavelengths and identifications from 160 to 770 angstroms , 1972 .

[9]  L. Jacchia.  Revised static models of the thermosphere and exosphere with empirical temperature profiles , 1971 .

[10]  H. Hinteregger,et al.  Solar radiation in the extreme ultraviolet and its variation with solar rotation , 1970 .

[11]  H. Hinteregger,et al.  Solar‐cycle variation of extreme ultraviolet radiation , 1969 .

[12]  H. Hinteregger.  Absolute intensity measurements in the extreme ultraviolet spectrum of solar radiation , 1965 .

[13]  W. Neupert,et al.  Absolute Calibration and Use of a Soft X-Ray Source of Characteristic Carbon Radiation , 1965 .

[14]  J. E. Manson.  Measurements of the solar spectrum between 30 and 128Å , 1972 .

[15]  L. Heroux,et al.  The interpretation of XUV rocket measurements of intensity ratios of solar spectral lines of the lithiumlike ions O vi, Ne viii, and Mg x , 1972 .

[16]  H. Hinteregger.  The extreme ultraviolet solar spectrum and its variation during a solar cycle. , 1970 .

[17]  R. Elgin,et al.  X-Ray Absroption Table for the 2-to-200 Å Region , 1969 .

[18]  J. E. Manson.  THE SPECTRUM OF THE QUIET SUN BETWEEN 30 AND 128 A FOR NOVEMBER 1965. , 1967 .

[19]  L. Jacchia.  The temperature above the thermopause. , 1965 .