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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 113,
A12316,
6 PP., 2008
doi:10.1029/2008JA013250
Nighttime medium-scale traveling ionospheric disturbances detected by network GPS receivers in Taiwan
General Education Center, Ching Yun University, Jhongli, Taiwan
Center for Space and Remote Sensing Research, National Central University, Chung-Li, Taiwan
Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa, Japan
National Standard Time and Frequency Laboratory, Telecommunication Laboratories, Chunghwa Telecom Co., Ltd., Chung-Li, Taiwan
Institute of Geoinformatics and Disaster Reduction Technology, Ching Yun University, Jhongli, Taiwan
Electronic Navigation Research Institute, Tokyo, Japan
Electronic Navigation Research Institute, Tokyo, Japan
The nighttime medium-scale traveling ionospheric disturbances (MSTIDs) are detected by the network GPS receivers in Taiwan for the first time. The two-dimensional mapping technique (a spatial resolution of 0.05° × 0.05° in latitude and longitude with 5 × 5 pixels smoothing) is applied on the data of TEC perturbations (TECp) and GPS phase fluctuations (ΔTEC/min). The results show that the MSTIDs move southwestward to latitude of 20.5°N with a horizontal velocity between 100 and 160 m/s and a wavelength of about 500 km. The wavefronts of the MSTIDs are aligned along the northwest-southeast direction. Furthermore, the greater ∣ΔTEC/min∣ values are corresponding to the wave peak and trough of TECp. This coincidence indicates that the MSTIDs play an important role for the generation of F region irregularities in the low-latitude ionosphere.
Received 3 April 2008; accepted 6 November 2008; published 31 December 2008.
Citation: (2008), Nighttime medium-scale traveling ionospheric disturbances detected by network GPS receivers in Taiwan, J. Geophys. Res., 113, A12316, doi:10.1029/2008JA013250.
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