Physics – Plasma Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51c1954p&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA51C-1954
Physics
Plasma Physics
[0358] Atmospheric Composition And Structure / Thermosphere: Energy Deposition, [2494] Ionosphere / Instruments And Techniques, [7823] Space Plasma Physics / Ionization Processes, [7949] Space Weather / Ionospheric Storms
Scientific paper
Solar radiation below 50 nm produces a substantial portion of the F region ionization and most of the E region ionization that drives chemical reactions in the thermosphere. At times before the launch of the SDO spacecraft there is a lack of high temporal and spectral resolution Solar EUV and XUV observations, particularly below 27 nm. To address the space data various solar irradiance models have been developed. We have developed a technique to use observations of escaping photoelectron fluxes from the FAST satellite and two different photoelectron production codes driven by model solar irradiance values to systematically examine differences between observed and calculated escaping photoelectron fluxes. We have compared modeled and observed photoelectron fluxes for the interval from September 14, 2006 to January 1, 2007. This is an interval included ~ 4 solar rotations and is characterized by modest solar and geomagnetic activity. Solar irradiance models included TIMED/SEE data, which is derived from a model below 27 nm, and the FISM Version 1, the SRPM predictive model based on solar observation, HEUVAC, S2000, and NRL, solar irradiance models. We used the GLOW and FLIP photoelectron production codes. Here we focus on the differences between solar irradiance models and small differences between photoelectron production code outputs using the same solar irradiance spectra over this time period.
Fontenla Juan Manuel
Peterson William K.
Richards Paul G.
Solomon Stanley C.
Tobiska W.
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