Abstract The Airglow and Solar Spectrometer Instrument (ASSI) on the San Marco D/L satellite has measured solar extreme ultraviolet irradiances. The data are currently being released for analysis. As a preliminary step in evaluating this important dataset, modeled solar irradiances from 4 to 105 nm are presented for comparison to the San Marco data. The comparable flux for March–December 1988 is obtained from a revised and extended empirical solar extreme ultraviolet model derived from OSO 1, OSO 3, OSO 4, OSO 6, AEROS A, and AE-E satellite and six rocket flight datasets. Model wavelength intervals having the highest photon flux include the 15–35 and 85–105-nm ranges. Solar rotational features are prominent on several occasions in the model time series. A useful example is the modeled integrated flux between 30–31 nm which includes the Si XI (30.3-nm) and He II (30.4-nm) irradiance. The modeled flux in this 1-nm range shows both an absolute 22% increase from beginning to end of mission and a solar rotational variability with a typical peak-to-valley ratio of 14%. The absolute modeled irradiance in this wavelength interval is 9 × 109 photons cm−2 s−1 ±35%.
Comparative solar EUV flux for the San Marco ASSI
Advances in Space Research ; 13 , 1 ; 255-259
1992-01-01
5 pages
Article (Journal)
Electronic Resource
English
Comparative solar EUV flux for the San Marco ASSI
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