Observation of movement of perturbations in the F-region

Heisler, L.H.

doi:10.1016/0021-9169(63)90116-8

Cited by 49 publications

(16 citation statements)

References 28 publications

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“…Distorted traces similar to those recorded for medium-scale travelling ionospheric disturbances (see e.g. Heisler, 1963, and references therein) are present on the daytime ionograms. The foF2 fluctuations, which also occur over periods of 30min or more, constitute large-scale structures (LSSs) and can be positive or negative as is shown by Fig.…”

Section: The Generation Of Ls-tids and Their Initial Equatorial Movemsupporting

confidence: 65%

Some aspects of large-scale travelling ionospheric disturbances which originate at conjugate locations in auroral zones, cross the equator and sometimes encircle the earth

Bowman

Mortimer

2011

Ann. Geophys.

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Abstract. The occurrence of large-scale travelling ionospheric disturbances (LS-TIDs) has been examined. Initially some literature on their generation is considered. Travel during daylight hours and also paths which involve propagation paths towards the poles are illustrated by a few examples from the literature. A daytime ionogram recording of an LS-TID is presented and discussed as are nighttime ionogram recordings for a poleward path of propagation. The tabulations of Moscow h F recordings around midnight are examined for significant height increases which along with geomagnetic bays some hours earlier confirm the existence of LS-TIDs. A sunspot-maximum interval is involved. Some of the Moscow events were related to bays which occurred 32 h earlier thus indicating earth encirclements. Also additional encirclements are recorded by using superposed-epoch analyses for some other events.

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Section: The Generation Of Ls-tids and Their Initial Equatorial Movemsupporting

confidence: 65%

Some aspects of large-scale travelling ionospheric disturbances which originate at conjugate locations in auroral zones, cross the equator and sometimes encircle the earth

Bowman

Mortimer

2011

Ann. Geophys.

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“…8 of Moore and Boulton (1987) shows. The UA-NPD maximum occurs in the middle of the day and is probably responsible for the absence of range-spread ionogram traces at these times, although distorted daytime ionogram traces exist due to the passage of AGWs which were detected earlier by Munro (1958) and Heisler (1963). Fig.…”

Section: Discussionmentioning

confidence: 95%

“…It seems likely that any ionospheric disturbance condition associated with the passage of an AGW may involve this inverse association. Some time ago Munro (1958) and Heisler (1963) detected AGWs which were responsible for daytime disturbances which generally involved distorted F layer ionogram traces. Bowman (1992b) has investigated these traces and found that also the annual and sunspot-cycle variations are similar to those found for nighttime spread-F.…”

Section: Article In Pressmentioning

confidence: 99%

The diurnal, annual and sunspot-cycle variations of ESFm at Huancayo compared with similar variations of spread-F occurrence at other longitudes and latitudes

Bowman

Mortimer

2009

Journal of Atmospheric and Solar-Terrestrial Physics

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“…The most significant outcome of this study is the detection of examples of the wavy structure of the electron density which has a wavelength around 500km and an amplitude from about 20 to 30% with respect to the background density. This may be understood as a manifestation of TID (Travelling Ionospheric Disturbance) phenomena that were reported previously by MUNRO (1956), HFisLER (1963) and BOWMEN (1965) based on the observations from the bottom-side of the ionosphere using ionospheric sounders. The in-situ observation by satellite TAIYO can, for the first time, provide all-over views of the cross sections of the electron density distribution affected by this TID phenomena in a form of wavy patterns.…”

Section: Introductionmentioning

confidence: 99%

Wavy patterns of ionospheric electron density profiles triggered by TID-Observation results of the electron density by TAIYO satellite.

Oya

Takahashi

Morioka

et al. 1982

J. geomagn. geoelec

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The obtained sheath capacity data of the spherical impedance probe with a radius of 6cm, installed on the TAIYO satellite, indicate periodic oscillations corresponding to wavy patterns, for the electron density distribution in the region of the ionosphere. The wave patterns can be identified with the substorm type geomagnetic disturbance within a possible delay time of 2 hours 30min to 6 hours from the onset time of the substorms. There were spread F echoes indicated in ISIS-2 data in the region of the South Atlantic anomaly coinciding with the time of the occurrence of the wavy pattern of the electron density profile detected by TAIYO in which the solar X-ray detector is also installed; the detector of the solar X-ray can be operated for the monitor of the energetic particle precipitation during night time conditions when no solar X-ray is injected to the detector. The occurrence of the spread Fechoes is associated with the enhancement of energetic particle precipitations. The most likely process that can provide a consistent interpretation of these observed evidences is the TID effect that is triggered as additional effects of the enhanced particle precipitation of the high energetic particles from the radiation belt caused by the arrival of the TID in the region of the F-2 layer. The possible TID is inferred to be caused by the auroral break up in a form of the acoustic gravity wave which propagates through the F layer with group velocity ranging from 250m/sec to 760m/sec, period of about 103sec and the wavelength of about 500km.

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Observation of movement of perturbations in the F-region

Cited by 49 publications

References 28 publications

Some aspects of large-scale travelling ionospheric disturbances which originate at conjugate locations in auroral zones, cross the equator and sometimes encircle the earth

Some aspects of large-scale travelling ionospheric disturbances which originate at conjugate locations in auroral zones, cross the equator and sometimes encircle the earth

The diurnal, annual and sunspot-cycle variations of ESFm at Huancayo compared with similar variations of spread-F occurrence at other longitudes and latitudes

Wavy patterns of ionospheric electron density profiles triggered by TID-Observation results of the electron density by TAIYO satellite.

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