Mid-latitude ionospheric scintillations of VHF radio signals associated with peculiar fluctuations of Faraday rotation

Sinno, K.; Kan, M.

doi:10.1016/0021-9169(78)90185-x

Cited by 22 publications

(11 citation statements)

References 5 publications

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“…The motivation for the current study stems from these findings. Similar observations have been reported from Japan [Sinno and Kan, 1978;Fujita et al, 1978], where larger scintillation events were observed most probably because of the field-ahgned nature of their propagation path.…”

Section: Introductionsupporting

confidence: 89%

Generation of kilometer scale irregularities during the midnight collapse at Arecibo

Basu¹,

Ganguly²,

Klobuchar³

1981

J. Geophys. Res.

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Coordinated observations of the incoherent scatter radar at Arecibo, Puerto Rico, and total electron content/scintillation measurements made by using the 137‐MHz transmissions from the geostationary satellite SMS 1 from the nearby station of Ramey are studied to determine the background ionospheric conditions necessary for the generation of kilometer scale irregularities in the midlatitude ionosphere. It is found that the well‐known midnight descent or collapse of the F region known to occur in this part of the world is sometimes associated with increases in the bottomside electron content, as well as large scintillation events (∼10 dB). From a measurement of vector ion velocities and electron densities during such events, it is determined that the scintillations occur in a region of eastward and northward electric fields coupled with a northward directed density gradient caused by the northward propagation of the midnight collapse. The role of possible plasma instability mechanisms, specifically the E × B gradient drift instability and the Perkins instability, is discussed in the formation of the kilometer scale irregularities giving rise to VHF scintillations.

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Section: Introductionsupporting

confidence: 89%

Generation of kilometer scale irregularities during the midnight collapse at Arecibo

Basu¹,

Ganguly²,

Klobuchar³

1981

J. Geophys. Res.

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“…However, the evidence suggests that the contribution of these small-scale structures to the extra traces on ionograms (defined as spread-F traces) is minimal. Consistent with the foregoing statements is the fact that wavelike patterns in the TEC readings deduced from Faraday rotation measurements are found to accompany short-period scintillations (SINNO and KAN, 1978) and also spread-F occurrence (LEI et al, 1986). SINNO and KAN (1978) report "irregular fluctuations of Faraday rotation angle ... with periods a few minutes up to several tens of minutes .... At the same time, severe intensity scintillation of period usually shorter than one minute occurred" (see also KERSLEY et al, 1980).…”

Section: Introductionmentioning

confidence: 67%

“…Consistent with the foregoing statements is the fact that wavelike patterns in the TEC readings deduced from Faraday rotation measurements are found to accompany short-period scintillations (SINNO and KAN, 1978) and also spread-F occurrence (LEI et al, 1986). SINNO and KAN (1978) report "irregular fluctuations of Faraday rotation angle ... with periods a few minutes up to several tens of minutes .... At the same time, severe intensity scintillation of period usually shorter than one minute occurred" (see also KERSLEY et al, 1980). RASTOGI et al (1989) find short-period scintillations to be associated with range-type spread-F, which they claim is "characterised by a series of discrete multiple layers parallel to the first order p'-f trace over the entire frequency range".…”

Section: Introductionmentioning

confidence: 67%

A review of some recent work on mid-latitude spread-F occurrence as detected by ionosondes.

Bowman

1990

J. geomagn. geoelec

154

160

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“…Kan (1978 and1980) used a geostationary satellite ETS-2 to observe VHF scintillations south of a mid-latitude station Kokobunji over a one year period (1977)(1978). They observed summer scintillation maxima mainly at night but also during the day.…”

Section: Introductionmentioning

confidence: 99%

Mid-latitude ionospheric scintillation anomaly in the Far East

Hajkowicz

Minakoshi²

2003

Ann. Geophys.

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Abstract.A long-term (over 3 years) study has been undertaken to obtain a comprehensive evaluation of VHF ionospheric scintillation morphology in East Asia (at Kokobunji in Japan), using amplitude records from Transit satellites. It is now evident that summer day and night scintillation enhancement in this mid-latitude region is a long-term evidence of a well-known Asian ionospheric disturbance anomaly. The scintillation activity is particularly strong during summer nights (21:00-24:00 LT) and on occasion, all satellite passes recorded on consecutive days are associated with pronounced scintillation activity. A second sub-maximum is observed in the summer pre-noon period (09:00-12:00 LT). The scintillation regions extend latitudinally for a distance of 400-600 km in the F-region and 100-200 km in the Eregion, mostly equatorwards of Kokobunji. For comparison similar scintillation data obtained for one year at the same longitudinal sector but in southern mid-latitudes (Brisbane in Australia) were compared with the simultaneous northern scintillation data. The scintillation activity at Brisbane was much less pronounced in the southern summer but was of the same low level during other seasons as that for Kokobunji. This consistent scintillation anomaly, as yet, has not been included in the global scintillation models, which are essential for radio-satellite communications.

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Mid-latitude ionospheric scintillations of VHF radio signals associated with peculiar fluctuations of Faraday rotation

Cited by 22 publications

References 5 publications

Generation of kilometer scale irregularities during the midnight collapse at Arecibo

Generation of kilometer scale irregularities during the midnight collapse at Arecibo

A review of some recent work on mid-latitude spread-F occurrence as detected by ionosondes.

Mid-latitude ionospheric scintillation anomaly in the Far East

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