Absolute solar flux measurement shortward of 575 A-circle
Journal Article
·
· J. Geophys. Res.; (United States)
A rare-gas ionization chamber was used to obtain an accurate measurement of the absolute solar EUV flux in the 50- to 575-A-circle region. The instrument, operating in total and near-total absorption, was flown on a solar-pointing sounding rocket on August 16, 1983. For the day of the flight the solar activity indices were F-italic/sub 10.7/ = 132.1 and R-italic/sub I-italic/ = 80, and the integrated solar irradiance at the earth, corrected for atmospheric absorption, was found to be 4.31 +- 0.31 x 10/sup 10/ photons cm/sup -2/ s/sup -1/. Almost exactly a year earlier (August 10, 1982) the same instrument measured an integrated solar flux of 5.71 +- 0.42 x 10/sup 10/ photons cm/sup -2/ s/sup -1/ during a time of enhanced solar activity (F-italic/sub 10.7/ = 209.5 and R-italic/sub I-italic/ = 155).
- Research Organization:
- Space Sciences Center, University of Southern California, Los Angeles
- OSTI ID:
- 5572465
- Journal Information:
- J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 91:A6; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
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