Structure of the Electric Field of a High-Power Radio Wave in the Outer Ionosphere

Frolov, V. L.; Mityakov, N. A.; Шорохова, Е. А.; Parrot, M.

doi:10.1007/s11141-013-9437-x

Cited by 11 publications

(16 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results from the reconstruction of the ionospheric electron density distribution indicate that as f 0 approaches foF2, density troughs may form that stretch along the entire F2 layer. Ray tracing calculations suggest that in these troughs the plasma became locally underdense for O-mode propagation so that pump energy could be transmitted through the F-region density peak into the topside ionosphere with the pump wave propagating along the geomagnetic field, thus arriving at similar conclusions as those of Frolov et al (2013). James et al (2017) reported transmissions from the Sura facility to CASSIOPE at an altitude of about 1300 km, for foF2 ∼ 0.1 MHz above f 0 of the transmitted O-mode wave.…”

Section: Discussionmentioning

confidence: 78%

“…Since in our case transionospheric propagation with f 0 < foF2 was observed, the absorption cannot have been too strong. We therefore suggest that L-and associated Z-mode propagation cannot be ruled out for the cases discussed by Frolov et al (2013). L-mode propagation would explain why transionospheric propagation was indeed observed near magnetic zenith and only for foF2 − f 0 f e /2, as the L-mode has its cutoff at f p ≈ f 0 + f e /2 and is evanescent for higher f p .…”

Section: Discussionmentioning

confidence: 84%

“…The electric field of a beam from the Sura facility was detected by the DEME-TER satellite at about 670 km altitude, near magnetic zenith (Frolov et al, 2013). This was observed for f 0 down to 0.5-0.7 MHz below foF2, which corresponds to foF2 − f 0 f e /2.…”

Section: Discussionmentioning

confidence: 96%

“…Transionospheric propagation was not observed during daytime, consistent with ionospheric conditions for development of large-scale cavities by HF pumping that are less favourable during daytime than during evening and nighttime. Frolov et al (2013) argued that conversion of the wave from O-mode to Z-mode in the bottomside ionosphere and vice versa on the topside could not explain the observations because the Z-mode was expected to be strongly absorbed where f p ≈ f 0 in the topside. The observations were done with ERP levels of 40-150 MW during evening and nighttime with probably only a minimum of D-region absorption.…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Evidence of <i>L</i>-mode electromagnetic wave pumping of ionospheric plasma near geomagnetic zenith

et al. 2018

View full text Add to dashboard Cite

Abstract. The response of ionospheric plasma to pumping by powerful HF (high frequency) electromagnetic waves transmitted from the ground into the ionosphere is the strongest in the direction of geomagnetic zenith. We present experimental results from transmitting a left-handed circularly polarized HF beam from the EISCAT (European Incoherent SCATter association) Heating facility in magnetic zenith. The CASSIOPE (CAScade, Smallsat and IOnospheric Polar Explorer) spacecraft in the topside ionosphere above the F-region density peak detected transionospheric pump radiation, although the pump frequency was below the maximum ionospheric plasma frequency. The pump wave is deduced to arrive at CASSIOPE through L-mode propagation and associated double (O to Z, Z to O) conversion in pump-induced radio windows. L-mode propagation allows the pump wave to reach higher plasma densities and higher ionospheric altitudes than O-mode propagation so that a pump wave in the L-mode can facilitate excitation of upper hybrid phenomena localized in density depletions in a larger altitude range. L-mode propagation is therefore suggested to be important in explaining the magnetic zenith effect.

show abstract

Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Evidence of <i>L</i>-mode electromagnetic wave pumping of ionospheric plasma near geomagnetic zenith

et al. 2018

View full text Add to dashboard Cite

show abstract

“…It may have a strong effect on propagation of radio waves of different frequency ranges and, as was demonstrated in [32], on transmission of the pump wave into the topside ionosphere. …”

Section: Characteristics Of the Cavity With Depleted Plasma Density (mentioning

confidence: 89%

Peculiarities of Excitation of Large-Scale Plasma Density Irregularities During Modification of the Ionospheric F 2 Region by High-Power HF Radio Waves

Frolov

Schorokhova

Куницын

et al. 2016

Radiophys Quantum El

Self Cite

View full text Add to dashboard Cite

We present the experimental results concerning the features of large-scale artificial plasma-density irregularities excited in the ionospheric F 2 region by high-power HF radio waves. The experiments were performed in recent years using the SURA heating facility. It is shown that at the altitude of the pump-wave reflection, these irregularities are most efficiently generated in the magnetic zenith region. The effect of enhancement of the large-scale irregularity generation at the edge of the pump-wave beam is revealed. The results of studying large-scale irregularities recorded at the altitudes of the topside ionosphere are presented. Experimental results concerning the features of the internal gravity waves generated at the ionospheric altitudes during periodic heating of the ionospheric plasma by high-power HF radio waves are summarized and their possible influence on generation of artificial ionospheric irregularities at a long distance from the heater is discussed.

show abstract

Radiotomography and HF ray tracing of the artificially disturbed ionosphere above the Sura heating facility

et al. 2016

Self Cite

View full text Add to dashboard Cite

We present the results of the radiotomographic imaging of the artificial ionospheric disturbances obtained in the recent experiments on the modification of the midlatitude ionosphere by powerful HF radiowaves carried out at the Sura heater. Radio transmissions from low orbital PARUS beacon satellites recorded at the specially installed network of three receiving sites were used for the remote sensing of the heated ionosphere. We discuss the possibility to generate acoustic-gravity waves (AGWs) with special regimes of ionospheric heating (with the square wave modulation of the effective radiated power at the frequency lower than or of the order of the Brunt-Vaisala frequency of the neutral atmosphere at ionospheric heights during several hours) and present radiotomographic images of the spatial structure of the disturbed volume of the ionosphere corresponding to the directivity pattern of the heater, as well as the spatial structure of the wave-like disturbances, which are possibly heating-induced AGWs, diverging from the heated area of the ionosphere. We also studied the HF propagation of the pumping wave through the reconstructed disturbed ionosphere above the Sura heater, showing the presence of heater-created, field-aligned irregularities that effectively serve as "artificial radio windows."

show abstract

Structure of the Electric Field of a High-Power Radio Wave in the Outer Ionosphere

Cited by 11 publications

References 30 publications

Evidence of <i>L</i>-mode electromagnetic wave pumping of ionospheric plasma near geomagnetic zenith

Evidence of <i>L</i>-mode electromagnetic wave pumping of ionospheric plasma near geomagnetic zenith

Peculiarities of Excitation of Large-Scale Plasma Density Irregularities During Modification of the Ionospheric F 2 Region by High-Power HF Radio Waves

Radiotomography and HF ray tracing of the artificially disturbed ionosphere above the Sura heating facility

Contact Info

Product

Resources

About

Structure of the Electric Field of a High-Power Radio Wave in the Outer Ionosphere

Cited by 11 publications

References 30 publications

Evidence of &lt;i&gt;L&lt;/i&gt;-mode electromagnetic wave pumping of ionospheric plasma near geomagnetic zenith

Evidence of &lt;i&gt;L&lt;/i&gt;-mode electromagnetic wave pumping of ionospheric plasma near geomagnetic zenith

Peculiarities of Excitation of Large-Scale Plasma Density Irregularities During Modification of the Ionospheric F 2 Region by High-Power HF Radio Waves

Radiotomography and HF ray tracing of the artificially disturbed ionosphere above the Sura heating facility

Contact Info

Product

Resources

About

Evidence of <i>L</i>-mode electromagnetic wave pumping of ionospheric plasma near geomagnetic zenith

Evidence of <i>L</i>-mode electromagnetic wave pumping of ionospheric plasma near geomagnetic zenith