Program for Thermospheric Calculations

MSIS83 computer program for empirical model of thermosphere based on mass-spectrometer and incoherent-scattering data. Provides description of atmospheric temperature, density, and composition at altitudes higher than 85 kilometers. Co-efficients account for yearly and daily variations, and solar activity. Variations due to magnetic storms represented by 3-hour magnetic ap indices. MSIS83 model enables more timely prediction of aeronomic densities for such specific events as rocket flights. MSIS83 written in FORTRAN 77.