Global empirical model of electron temperature in the outer ionosphere for period of high solar activity based on data of three Intercosmos satellites Original Research Article

Measurements onboard three Intercosmos satellites (IK 19, IK 24, and IK 25) yielded a data base of Te from periods of high solar activity. This data base has been used to construct global empirical model of Te in the region of 500 to 3000 km altitude and ±90° invariant latitude. Individual submodels for two seasons (equinox, and solstice) and four different altitudes (550, 900, 1500, and 2500 km) were produced. They depend on invariant latitude and magnetic local time. Spherical harmonics up to the 8th order were used. Differences between our global model and IRI are analyzed.