USU GAIM_GM Realtime Global
Real-time global GAIM ionosphere data started on September 1, 2009. SWC began operations of the global Gauss-Markov GAIM system on its servers. Real-time ionosphere data of total electron content (TEC) and time-dependent electron density profiles are generated every 15 minutes.
The motivation for developing GAIM is because government and commercial users have a critical need for reliable high-frequency (HF) communications and for accuracy knowledge in GPS-based navigation systems. To satisfy this need requires an accurate specification of the effect that the upper atmosphere/ionosphere has on operational communication links and navigation systems. Like the Earth’s lower atmosphere, the Earth’s upper atmosphere and ionosphere (ionized gas) display highly variable and turbulent densities, temperatures, and winds, and these features are manifestations of space weather. These disturbances can adversely affect systems and operations, including over-the-horizon radars, HF communications, Global Position System (GPS) navigation, and GPS aided geo-location. Ionospheric corrections are particularly important for accurate location knowledge and for obtaining usable communication frequencies between two geographic locations.