Theoretical and Empirical Models in the CEDAR Data Base at NCAR/HAO

FLIP: The Field Line Interhemispheric Plasma model solves for plasma densities and temperatures along flux tubes. The code is available from Philip Richards. GLOW: A thermospheric airglow model developed by Stan Solomon.

TIGCM, TIEGCM, and TIMEGCM: The Thermosphere/Ionosphere General Circulation Model (TIGCM) has been expanded to solve for electrodynamics (TIEGCM) in low and mid-latitudes, and extended to the mesosphere (TIMEGCM). Contact Raymond Roble or Barbara Emery. VSH: The Vector Spherical Harmonic produces thermospheric (110-1500 km) global neutral winds based on TIGCM model runs.

Source code is available from Timothy Killeen. Empirical Models include: APEX: a geomagnetic field model. Richmond (1995), Van Zandt , et. al (1972).

CHIU: Chiu model electron densities. Chiu (1975) E FIELD: gives quiet-day ionospheric electrostatic potential and E X B drifts at 300 km for magnetic latitudes below 60 degrees during polar minimum conditions. Richmond, et. al (1980).

HMR: gives electric potential and fields defined by Rich and Maynard (1989) from patterns described by Heppner and Maynard (1987). HPI: tables of interpolations of the NOAA satellite auroral electron flux, Pederson and Hall conductance, and characteristic energy based on the Hemispheric Power Index (HPI). Fuller-Powell and Evans (1987).

HWM: Horizontal Wind Model gives neutral winds. Hedin, et. al (1988), Hedin, et. al (1991) IRI: returns neutral temperatures and ionospheric parameters and ion composition. Bilitza (1986).

IZMEM: Electric potentials and fields. Papitashvili, et. al (1994). MAGFLD: geomagnetic field model for 1965-1995.

MH: Electric potentials and fields parameterized by HPI and Millstone Hill data. Foster (1987), Foster, et. al (1986). MSIS: returns neutral temperature and composition values.

Hedin (1983), Hedin (1987). WEIMER: Electric potentials and fields. Weimer (1996).

The CEDAR Data Base is accessible through the WWW and ftp, but users must have a valid access form, available from the WWW or ftp (see Access and Use constraints) or contact Barbara Emery (emery@hao.ucar.edu). See the WWW site for additonal information on accessing the data and Rules of the Road procedures.