Abstract
This letter proposes a novel extremely low frequency (ELF) radar for localized D-region (altitude < 95 km) ionospheric anomalies that have been generated by natural geophysical processes. The proposed system would use the former U.S. Navy Wisconsin Transmitting Facility as a distant well-characterized impulsive ELF source. Sample calculations that demonstrate how passive vertical E-field detectors could characterize ionospheric conductivity depressions of variable diameter located above Los Angeles are provided. These calculations have been obtained using our recently developed three-dimensional whole-Earth electromagnetic wave propagation model based upon the rigorous finite-difference time-domain solution of Maxwell's equations. A key potential application of the proposed ELF radar system is the detection of hypothesized ionospheric earthquake precursors.
Original language | English (US) |
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Article number | 1715304 |
Pages (from-to) | 500-503 |
Number of pages | 4 |
Journal | IEEE Geoscience and Remote Sensing Letters |
Volume | 3 |
Issue number | 4 |
DOIs | |
State | Published - Oct 2006 |
Funding
Manuscript received March 17, 2006; revised April 19, 2006. This work was supported by the Pittsburgh Supercomputing Center under Grant EAR050012P. The authors are with the Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL 60208 USA (e-mail: [email protected]). Digital Object Identifier 10.1109/LGRS.2006.878443
Keywords
- Earthquakes
- Extremely low frequency (ELF)
- Finite difference time domain (FDTD)
- Ionospheric disturbances
- Radar
- Remote sensing
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Electrical and Electronic Engineering