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SAMI3 (1.0)

SAMI3 Low-to-Mid-Latitude Ionosphere

Model Description

SAMI3 (Sami3 is Also a Model of the Ionosphere) is three-dimensional global ionospheric model based on the two-dimensional model SAMI2 [Huba et al., 2000, 2008]. The SAMI3 calculates the plasma and chemical evolution of seven ion species (H+, He+, N+, O+, NO+, N2+ and O2+) in the altitude range 85 km to 20,000 km. The ion temperature equation is solved for three ion species (H+, He+, and O+) as well as the electron temperature equation. Ion inertia is included in the ion momentum equation for motion along the geomagnetic field. An offset, tilted dipole geomagnetic field is used, and the plasma is modeled from hemisphere to hemisphere. High altitude boundary conditions are not needed since a complete ionospheric flux tube is modeled. In addition, the E x B drift motion of the plasma is included for both zonal electric fields (vertical drifts) and meridional electric fields (zonal drifts). The neutral composition and temperature are provided by NRLMSISE00 model and the neutral winds are obtained from the HWM models. SAMI3 uses a unique, nonorthogonal, nonuniform, fixed grid.

Model Figure(s) :

Model Inputs Description

Value of F10.7 (1 day and 3 months average).
AP Index
ExB Drift velocity

Model Outputs Description

ion density
ion temperature
ion velocity
electron temperature
NmF2
hmF2
TEC (Total Electron Content)

Model Caveats

Where to get input parameters: 
AP, F10.7
http://www.sec.noaa.gov/ftpmenu/indices/dayind.html
http://www.ngdc.noaa.gov/

Change Log

Model Acknowledgement/Publication Policy (if any)

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Curator: Chiu Wiegand | NASA Official: Dr. Masha Kuznetsova | Privacy and Security Notices | Accessibility | CCMC Data Collection Consent Agreement