Medium-scale traveling ionospheric disturbances observed with the GPS networks in South-California

Details Medium-scale traveling ionospheric disturbances observed with the GPS networks in South-California Medium-scale traveling ionospheric disturbances observed with the GPS networks in South-California

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa21b0345k&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SA21B-0345

Physics

2400 Ionosphere, 2439 Ionospheric Irregularities

Scientific paper

We analyzed GPS data obtained from about 350 dual-frequency GPS receivers in South-California in a whole year of 2002 to investigate two-dimensional structures of Medium-Scale Traveling Ionospheric Disturbances (MSTID). The GPS data were provided from International GPS Service (IGS) in South-California, Southern California Integrated GPS Network (SCIGN) and Continuously Operating Reference Stations (CORS). We calculated Total Electron Content (TEC) from GPS data and subtracted 1-hour running average from time sequence of TEC obtained from each pair of GPS receiver and satellite to derive the perturbation component of TEC. Two-dimensional maps of the TEC perturbations within the area of 110-124W and 30-40N were derived with a time resolution of 30 s and a spatial resolution of 0.15 x 0.15 degrees in longitude and latitude. For example, MSTIDs propagating toward south-eastward with a velocity of about 170 m/s were observed during 0800-0900LT on January 21, 2002. Horizontal wavelength and period of the MSTID were 200 km and 20 min, respectively. They are comparable with those of MSTIDs observed in Japan. In this presentation, we show statistical results of occurrence rate and propagation features of MSTID in South-California in 2002.

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