NDLI: Propagation of LF ground-wave through inhomogeneous atmosphere

Content Provider	IEEE Xplore Digital Library
Author	Yurong Pu Zhengwei Li Lili Zhou Xiaoli Xi
Copyright Year	2014
Description	Author affiliation: Fac. of Autom. & Inf. Eng., Xi'an Univ. of Technol., Xi'an, China (Yurong Pu; Zhengwei Li; Xiaoli Xi) \|\| Shaanxi Univ. of Sci. & Technol., Xi'an, China (Lili Zhou)
Abstract	Atmosphere refractivity is one of the most important parameters in the low frequency (LF) ground-wave propagation. It is predominantly horizontally stratified and time dependent. In this paper, the 2-D rotational symmetric moving window finite-difference time-domain algorithm is employed to investigate the impacts of different refractivity-height profiles on the field strength and time-delay of the LF ground-wave propagation through inhomogeneous atmosphere. The impacts of the refractivity's seasonal and diurnal variations are also studied. Taking Loran-C system as an example, numerical results show that the refractivity-height profile has relatively large impact on the time delay. Using a linear height profile can lead to an error on the time delay at the level of hundreds of nanoseconds with a propagation distance of 1000 km; while for the same propagation distance, the refractivity's seasonal and diurnal variations may affect the time-delay on the order of several tens of nanoseconds.
Starting Page	663
Ending Page	666
File Size	3997032
Page Count	4
File Format	PDF
e-ISBN	9781479943548
DOI	10.1109/APCAP.2014.6992583
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-07-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Finite-difference time-domain (FDTD) algorithm Atmospheric modeling Delay effects Refractive index Terrestrial atmosphere Refractivity Moving window (MW) Low frequency ground-wave propagation Numerical models Time-domain analysis Finite difference methods Inhomogeneous atmosphere
Content Type	Text
Resource Type	Article

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