Space correction of global models of electron number density in the ionosphere by receiving at one site signals from low-orbit satellites |
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| Institution: | 1. Shanghai Astr. Obs., Chinese Acad. Sci., 80 Nandan Rd, Shanghai 200030, China;2. Hokkaido Univ., N10 W8, Kita-ku, Sapporo, Japan;3. Earthq. Res. Inst. Univ. Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, Japan;4. First Monitoring and Application Center, China Earthq. Admin, Tianjin, China;1. GNSS Research Center, Wuhan University, Wuhan 430079, China;2. Institute of Tracking and Telecommunication Technology, Beijing 100094, China;1. Institute for Scientific Research, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA 02467, United States;2. Bozeman High School, 205 North 11th Avenue, Bozeman, MT 59715, United States;3. now at Rice University, 6100 Main St, Houston, TX P77005, United States |
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| Abstract: | A technique for updating global models of the electron density N in real time is developed. It employs the ionospheric part of the Doppler shift due to the rate of change of the total electron content determined at one site from measurements of signals from the radio beacons aboard low-orbit satellites. This technique enables corrections of the Chiu model over a region of about 1,000 km in a North-South direction. To study a possibility of predicting N in an East-West direction using the corrected model, we employ the measurements of satellite signals received at three sites spaced up to 2,000 km. For updating global N models, it is determined that spacing between correction sites can be up to about 3,000 to 4,000 km. |
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