VLF MONITORING SYSTEM FOR CHARACTERIZING THE LOWER REGION IONOSPHERIC LAYER
نویسندگان
چکیده
منابع مشابه
Daytime ionospheric D region sharpness derived from VLF radio atmospherics
[1] We described and applied a technique to measure the local midlatitude daytime ionospheric D region electron density profile sharpness from the Earth‐ionosphere waveguide mode interference pattern in the spectra of radio atmospherics (or sferics for short), which are the high‐power, broadband, very low frequency (VLF, 3–30 kHz) signals launched by lightning discharges. VLF propagation simula...
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Lightning discharges radiate the bulk of their electromagnetic energy in the very low frequency (VLF, 3–30 kHz) and extremely low frequency (ELF, 3–3000 Hz) bands. This energy, contained in impulse-like signals called radio atmospherics or sferics, is guided for long distances by multiple reflections from the ground and lower ionosphere. This suggests that observed sferic waveforms radiated fro...
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Intense HF radiation from a ground-based facility heats the D-region of the ionosphere. The heating modifies the electron energy distribution function, which is found by solving the kinetic equation at each spatial location. The solution selfconsistently takes into account attenuation of HF radiation due to modified HF conductivity. A modulation HF radiation at ELF/VLF frequencies creates corre...
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It is recently recognized that the ionosphere is very sensitive to seismic effects, and the detection of ionospheric perturbations associated with earthquakes, seems to be very promising for short-term earthquake prediction. We have proposed a possible use of VLF/LF (very low frequency (3-30 kHz) /low frequency (30-300 kHz)) radio sounding of the seismo-ionospheric perturbations. A brief histor...
متن کاملBroadband VLF measurements of lightning-induced ionospheric perturbations
[1] Very low frequency (VLF) electromagnetic pulses radiated by lightning are an effective tool for probing the D region ionosphere. We detect and measure the D region ionospheric disturbances caused by the strong lightning flash by analyzing the broadband VLF spectrum from lightning that occurred just before and after a nearby intense lightningdischarge.Comparing themeasured electrondensity ch...
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ژورنال
عنوان ژورنال: Progress In Electromagnetics Research M
سال: 2018
ISSN: 1937-8726
DOI: 10.2528/pierm17112802