Abstract:

Polar regions are ideal places to investigate physical phenomenon of higher atmosphere and solar-terrestrial relationship, and GPS-based TEC extraction has advantages of high precision, all weather and large field, so it is significant to research polar ionosphere using GPS. Monitoring and distribution system about TEC, designed in this paper, contains data transmission, data processing, data distribution. Data transmission contains satellites network and formats conversion. Data processing means by using the GPS dual-frequency data, VTEC of single station is calculated, with DCB solved first and twice modeling second. The result shows that this method reflects value and variation of TEC exactly. Data distribution means real-time online inquiry service, supported by Chinese Polar Scientific Expedition Management Information System.

Key words: ionosphere, TEC, monitoring, distribution