Global maps of ionospheric TEC and differential TEC (present map vs.
a quiet-time pattern) are produced by mapping GPS observables
collected from globally distributed ground stations. These maps
are being tested for near real-time data acquisition and monitoring
facilities. These maps are also used to monitor global
ionospheric weather and to nowcast ionospheric
storms that often occur responding to activities in solar
wind and Earth's magnetosphere as well as thermosphere.
Global maps of ionospheric irregularities are produced by mapping GPS observables collected from globally distributed ground stations. These maps provide crucial information about where navigation and communication systems may be affected by hash ionospheric enviornment.
The U.S. regional maps of ionospheric total electron content (TEC) are produced in real-time (RT) by mapping GPS observables collected from ground stations. These maps are being tested for monitoring facilities and RT data acquisition for ionospheric nowcasting purposes. The RT TEC mapping can provide accurate ionospheric calibrations to navigation systems. These maps are also used to monitor ionospheric weather and to nowcast ionospheric storms in the north America.