Numerical modeling of rocket-produced ionospheric waves
C. H. Lin1, C. H. Chen1, M. Matsumura2, J. T. Lin1
1Department of Earth Science, National Cheng Kung University, Tainan, Taiwan
2National Institute of Polar Research, Research Organization of Information and Systems, Tokyo, Japan
Observations of GPS-TEC maps constructed for the 2009 North Korea (NK) Taepoding-2 and 2013 South Korea (SK) KSLV-II rocket launches show shock wave fronts in TEC perturbations. The TEC perturbations have oscillation period of 100-600 seconds propagating perpendicular outward from the rocket trajectory with supersonic velocities between 800-1200 m/s for both events. Twenty minutes after the rocket transit delayed TEC perturbation waves appeared and propagated along the bow wave direction with phase velocities of 800-1200 m/s. These wave characteristics are simulated by solving the couple continuity, momentum and energy equations for neutral and ionized components of the atmosphere. By applying the effect of the propulsive blasts of the rocket exhaust plumes, the observed immediate and delayed waves are reproduced. The simulation also reproduces the TEC depletion perturbation due to divergence of perturbed neutral winds, which result in plasma diverge away from the rocket trajectory.