HR: 08:30h
AN: SA31A-01 INVITED     [Abstracts]
TI: Solar EUV models and photoelectron transport at Earth: challenges
AU: * Richards, P G
EM: philip.g.richards@nasa.gov
AF: NASA HEADQUARTERS, Sun-Earth Systems Division, Science Mission Directorate, NASA Headquarters, 3Q39, Washington, DC 20546 United States
AB: This paper presents an overview of models of solar EUV and soft X-ray fluxes that are responsible for producing the ions and photoelectrons in the Earth's ionosphere. In particular, solar fluxes from models based on earlier measurements from the Atmosphere Explorer satellites are compared with recent measurements of the solar EUV and X-ray fluxes from the TIMED satellite. Model photoelectron fluxes are also compared with measurements from the earlier Atmosphere Explorer and recent FAST satellites. This paper also discusses the impact on the models from uncertainties in our knowledge of the photoionization and electron impact cross sections that are required for accurate modeling of the density and temperature of the ionosphere.
DE: 0358 Thermosphere--energy deposition
DE: 2423 Ionization mechanisms
DE: 2479 Solar radiation and cosmic ray effects
SC: SPA-Aeronomy [SA]
MN: 2005 Joint Assembly