Two Dimensional Full‐Wave Modeling of Propagation of Low‐Altitude Hiss in the Ionosphere
Abstract
We investigate the propagation characteristics of low‐altitude hiss in the ionosphere by numerical simulation with a two‐dimensional full‐wave model. The simulation results demonstrate that linear mode conversion from whistler to H+ band electromagnetic ion cyclotron wave and polarization reversal occur simultaneously where wave frequency matches the H+−He+ crossover frequency. This mode conversion efficiency shows sensitive dependence on wave normal angle and plays a significant role in the propagation of whistler emission near the local proton gyro‐frequency in the ionosphere by redistributing the wave energy below and above the H+−He+ cutoff frequency, which can explain the low‐altitude hiss observed by the Freja and Detection of Electromagnetic Emissions Transmitted from Earthquake Regions satellites, respectively. The energy of whistler‐mode low‐altitude hiss emission can be transferred to reflected left‐hand polarized electromagnetic ion cyclotron through mode conversion and the efficiency reaches a maximum for intermediate incident wave normal angle (of 45°).
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 20, 2020
- Source ID
- 10.1029/2019gl086601
Entities
People
- Chen Zhou
- Jamesina Simpson
- Lunjin Chen
- Xiang Xu
- Xu Liu
- Yuannong Zhang
- Zhiyang Xia
Organizations
- Air Force Office of Scientific Research
- National Natural Science Foundation of China
- University of Texas at Dallas
- University of Utah
- Wuhan University