Absolute solar flux measurement shortward of 575 A

Details Absolute solar flux measurement shortward of 575 A Absolute solar flux measurement shortward of 575 A

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.7089o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, June 1, 1986, p. 7089-7092.

Computer Science

Sound

48

Extreme Ultraviolet Radiation, Solar Flux, Ultraviolet Astronomy, Flux Quantization, Gas Ionization, Ionization Chambers, Rocket Sounding

Scientific paper

A rare-gas ionization chamber was used to obtain an accurate measurement of the absolute solar EUV flux in the 50- to 575-Å 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 F10.7 = 132.1 and RI = 80, and the integrated solar irradiance at the earth, corrected for atmospheric absorption, was found to be 4.31±0.31x1010 photons cm-2s-1. Almost exactly a year earlier (August 10, 1982) the same instrument measured an integrated solar flux of 5.71±0.42x1010 photons cm-2s-1 during a time of enhanced solar activity (F10.7 = 209.5 and RI = 155).

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