Detection of acoustic-gravity waves in lower ionosphere by VLF radio waves

Abstract

We present a new method to study harmonic waves in the low ionosphere (60 - 90 km) by detecting their effects on reflection of very low frequency (VLF) radio waves. Our procedure is based on amplitude analysis of reflected VLF radio waves recorded in real time, which yields an insight into the dynamics of the ionosphere at heights where VLF radio waves are being reflected. The method was applied to perturbations induced by the solar terminator motions at sunrises and sunsets. The obtained results show that typical perturbation frequencies found to exist in higher regions of the atmosphere are also present in the lower ionosphere, which indicates a global nature of the considered oscillations. In our model atmosphere, they turn out to be the acoustic and gravity waves with comparatively short and long periods, respectively.

References in corpus (4)

• Rogue waves in the atmosphere
• Altitude distribution of electron concentration in ionospheric D-region in presence of time-varying solar radiation flux
• Effective electron recombination coefficient in ionospheric D-region during the relaxation regime after solar flare from February 18, 2011
• The influence of solar spectral lines on electron concentration in terrestrial ionosphere

Cited by in corpus (6)

• Pulsations in the Earth's Lower Ionosphere Synchronized with Solar Flare Emission
• Sensing the Earth's low ionosphere during solar flares using VLF signals and GOES X-ray data
• Low ionospheric reactions on tropical depressions prior hurricanes
• Detection of short term response of the low ionosphere on gamma ray bursts
• TESS observations of flares and quasi-periodic pulsations from low mass stars and potential impact on exoplanets
• Diagnostics of plasma in the ionospheric D-region: detection and study of different ionospheric disturbance types