The National Space Science Data Center, Greenbelt, Md., recently published “Solar Terrestrial Models and Applications Software,” by Dieter Bilitza (NSSDC 90-19, July 1990, 98 pp.), which identifies and describes more than 70 model software packages in several areas of the solar-terrestrial environment. Some of these may be accessed and run on the NSSDC Online Data and Information Services (NODIS) account by external researchers.

The principal areas and parameters covered include ionosphere (electron density and temperature, ion temperature, composition, and drift, electric field and current, precipitating particle flux, etc.), atmosphere (density, temperature, winds, etc.), magnetosphere (internal- and external-source geomagnetic fields, energetic proton and electron fluxes, etc.), Sun and interplanetary space (IR and EUV reference spectra, solar protons, cosmic rays, etc.) and Venus atmosphere and ionosphere. Representative models include the International Reference Ionosphere (IRI), the Heppner-Maynard-Rich ionospheric electric field model, the Committee on Space Research (COSPAR) Interna tional Reference Atmosphere (CIRA), the International Geomagnetic Reference Field (IGRF), the Tsyganenko geomagnetic models (1982, 1987, and 1989), the AP8 and AE8 trapped particle models, the revised SERF2 solar EUV Flux model [Tobiskas, 1990], the Jet Propulsion Laboratory solar proton model, and the CREME cosmic ray program.