气候变化领域集成服务门户(CCPortal): Alpha Transmitter Signal Reflection and Triggered Emissions

CCPortal

DOI	10.1029/2020GL090165
	Alpha Transmitter Signal Reflection and Triggered Emissions
	Gu W.; Chen L.; Xia Z.; An X.; Horne R.B.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	Russian Alpha radio navigation system (RSDN-20) emits F1 = 11.9 kHz signals into the magnetosphere which propagate as whistler mode waves. Observed by waveform continuous burst mode from Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on Van Allen Probes, a case is presented and featured with ducted propagation, multiple reflections, and triggered emissions. Both risers and fallers appear in the triggered emissions. We use a ray tracing method to demonstrate ducted propagation, which has a similar wave normal angle near 150° as the observation. The arrival time of reflected signals is estimated using propagation analysis and compared with the observed signal arrival time. To test the nonlinear cyclotron resonance theory, the interaction region scale and the order of chirping rate in triggered emission are estimated. The estimated interaction region scale of MLAT = −3° is smaller than the observed MLAT = −6°. The discrepancy may be caused by the parallel propagation assumption and background field model. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospherics; Magnetosphere; Navigation systems; Ray tracing; Time difference of arrival; Electric and magnetic fields; Interaction region; Multiple reflections; Parallel propagation; Propagation analysis; Signal arrival time; Transmitter signals; Whistler-mode waves; Radio navigation; arrival time; electric field; magnetic field; magnetosphere; navigation; ray tracing; reflectivity; resonance; signal processing; wave propagation; waveform analysis; Russian Federation
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169339
作者单位	Physics Department, W. B. Hanson Center for Space Sciences, University of Texas at Dallas, Richardson, TX, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; British Antarctic Survey, Cambridge, United Kingdom
推荐引用方式 GB/T 7714	Gu W.,Chen L.,Xia Z.,et al. Alpha Transmitter Signal Reflection and Triggered Emissions[J],2020,47(23).
APA	Gu W.,Chen L.,Xia Z.,An X.,&Horne R.B..(2020).Alpha Transmitter Signal Reflection and Triggered Emissions.Geophysical Research Letters,47(23).
MLA	Gu W.,et al."Alpha Transmitter Signal Reflection and Triggered Emissions".Geophysical Research Letters 47.23(2020).