1. Ionosphere Modeling
and Tomography
Cheng Wang
Tongji University, Shanghai, China
Miami University, Oxford, Ohio, US
2013-02-01


2. • Learn temporal and spatial variation
• Improve the performance of GNSS
• Protect Satellites from bad space
environment
• Coupling effect of Earthquake

3. Incoherent Scatter RadarRocket SoundingTopside SounderIonosonde
Spatial and temporal resolution is limited.

5. Data: observation of 183 stations on 2012.05.15
Model: 15degree 15order spheric harmonics function
Solution: model’s coefficient, satellites’ DCB, and receivers’ DCB
Parameters: 16*16*13+183+32=3543 。
Standard deviation of unit weight: 1.6TECU

8. Simulation: Hong Kong Local Ionosphere Tomography on 2009.05.04