Statistical study of large‐scale traveling ionospheric disturbances generated by the solar terminator over China

摘要: [1] This paper presents a statistical result of large-scale traveling ionospheric disturbances (LSTIDs) associated with moving solar terminator in China during 12 months from February 2011 to January 2012. The LSTIDs are identified by the two-dimensional total electron content (TEC) perturbation maps, which built based on observations GPS network data China. combined an ionosonde chain established Institute Geology and Geophysics, Chinese Academy Sciences. A 135 LSTID events at dawn, while there is indiscernible dusk. Meanwhile, these captured shows that perturbations virtual heights passage height between 200 700 km. occurrence rate maximum winter minimum summer. propagate across phase front widths larger than 1500 propagation direction northwestward winter, southwestward summer, quasi-westward equinoxes, respectively. average period, horizontal velocity, wavelength 79 ± 12 min, 288 ± 43 m/s, 1503 ± 205 km, relative TEC attenuate as travel