On the theory of the incoherent scatter gyrolines

Hysell, D. L.; Vierinen, Juha; Sulzer, M. P.

doi:10.1002/2017rs006283

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…In this section we derive an approximate dispersion relation for lower hybrid electrostatic waves in a homogeneous plasma. We follow a similar procedure to the one used in (Hysell, Vierinen, et al, 2017). Since the dominant ion is H + at the altitudes at which the echoes were observed, that is from 1,200 km to 2,200 km, we simplify the analysis considerably by assuming a two species plasma (electrons and H + ).…”

Section: Appendix A: Dispersion Relation Of Lower Hybrid Waves In Hom...mentioning

confidence: 99%

High Altitude Echoes From the Equatorial Topside Ionosphere During Solar Minimum

et al. 2021

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We describe a new class of nonthermal plasma density irregularities observed in the postmidnight topside equatorial ionosphere under low solar flux conditions. They are distinct from irregularities associated with equatorial spread F (ESF) in terms of their morphology and because they exhibit strong spectral sidebands at the lower‐hybrid frequency. The coherent echoes were observed in a series high‐altitude radar experiments performed at Jicamarca utilizing long‐ and coded double‐pulse modes and a dual‐beam mode. The coded double‐pulse mode was used to measure the low‐frequency characteristics of the echoes with fine range resolution. Doppler shifts of the main backscatter line were observed to fall between ±150 m/s. The long‐pulse mode was employed for high‐frequency spectral analysis which revealed the presence of strong spectral sidelobes at the lower‐hybrid frequency. A dual‐beam mode was used to investigate the horizontal structure of the echoes. Zonal drift speeds of 50–70 m/s were inferred with this mode, and longitudinal dimensions of approximately 270 km were estimated. The study summarizes with a discussion of different mechanisms that may be responsible for the phenomenon and the lower‐hybrid sidebands in particular.

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Section: Appendix A: Dispersion Relation Of Lower Hybrid Waves In Hom...mentioning

confidence: 99%

High Altitude Echoes From the Equatorial Topside Ionosphere During Solar Minimum

et al. 2021

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“…The price paid for pulse compression is a reduction in sensitivity due to increased radar clutter. Inverse methodology is increasingly being used as a replacement for pulse compression in some ISR applications (e.g., Hysell et al, 2008Hysell et al, , 2017).…”

Section: Radio Sciencementioning

confidence: 99%

The Case for Combining a Large Low‐Band Very High Frequency Transmitter With Multiple Receiving Arrays for Geospace Research: A Geospace Radar

et al. 2019

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We argue that combining a high‐power, large‐aperture radar transmitter with several large‐aperture receiving arrays to make a geospace radar—a radar capable of probing near‐Earth space from the upper troposphere through to the solar corona—would transform geospace research. We review the emergence of incoherent scatter radar in the 1960s as an agent that unified early, pioneering research in geospace in a common theoretical, experimental, and instrumental framework, and we suggest that a geospace radar would have a similar effect on future developments in space weather research. We then discuss recent developments in radio‐array technology that could be exploited in the development of a geospace radar with new or substantially improved capabilities compared to the radars in use presently. A number of applications for a geospace radar with the new and improved capabilities are reviewed including studies of meteor echoes, mesospheric and stratospheric turbulence, ionospheric flows, plasmaspheric and ionospheric irregularities, and reflection from the solar corona and coronal mass ejections. We conclude with a summary of technical requirements.

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On the theory of the incoherent scatter gyrolines

Cited by 2 publications

References 27 publications

High Altitude Echoes From the Equatorial Topside Ionosphere During Solar Minimum

High Altitude Echoes From the Equatorial Topside Ionosphere During Solar Minimum

The Case for Combining a Large Low‐Band Very High Frequency Transmitter With Multiple Receiving Arrays for Geospace Research: A Geospace Radar

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