Simultaneous observations of ionospheric quasiperiodic scintillations from short and long meridional baselines using VHF transmissions from Transit satellites

Hajkowicz, L.A.; Minakoshi, H.

doi:10.1016/s1364-6826(02)00335-8

Cited by 3 publications

(4 citation statements)

References 17 publications

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“…In this study, if we take the velocity of ROCSAT‐1 as about 7.5 km/s, the scale of the plasma blob was about 800 km in the direction of the orbit. Thus, the scale of plasma blob in our case is consistent with that of the assumed blob from Hajkowicz and Minakoshi [].…”

Section: Discussionsupporting

confidence: 88%

“…In this study, if we take the velocity of ROCSAT-1 as about 7.5 km/s, the scale of the plasma blob was about 800 km in the direction of the orbit. Thus, the scale of plasma blob in our case is consistent with that of the assumed blob from Hajkowicz and Minakoshi [2003]. Figure 4 illustrates the variations of ion density, ion composition, and three components of ion drift velocity measured by ROCSAT-1 during the event in this study.…”

Section: Discussionsupporting

confidence: 78%

“…Using the scintillation data from three sites, Hajkowicz and Minakoshi [] inferred that the irregularity (they assumed it was a blob) could extend over a distance of 121 km. In this study, if we take the velocity of ROCSAT‐1 as about 7.5 km/s, the scale of the plasma blob was about 800 km in the direction of the orbit.…”

Section: Discussionmentioning

confidence: 99%

“…Both studies found that the scintillations were produced by small‐scale plasma blobs within the sporadic E layer because the critical frequencies of the Es increased. Hajkowicz and Minakoshi [] performed simultaneous observations of ionospheric scintillations in 150 MHz signals at three sites in the vicinity of the midlatitude station Brisbane (27.5°S, 152.9°E) and found that the scintillations at these sites were caused by a plasma blob at an altitude of 212 km in the F layer. However, the blob was identified by the scintillation pattern only.…”

Section: Introductionmentioning

confidence: 99%

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A case study on ionospheric scintillations at low latitude associated with a plasma blob observed in situ

Wang

Shi

Torkar

et al. 2015

Geophysical Research Letters

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In general, ionospheric scintillations at low latitude are considered as signatures of equatorial plasma bubbles (depletions). However, some authors considered that scintillations may also be associated with plasma blobs (enhancements), but there was no in situ measurement hitherto to confirm it. We performed a case study on the concurrent observation of an ionospheric plasma blob with in situ measurements by ROCSAT‐1 (i.e. Formosa satellite‐1) and of GPS amplitude scintillations in the low‐latitude ionosphere on 1 June 2003. The blob measured in situ had a scale size of about 800 km in the F layer, and the ion density inside the blob was severely disturbed. Amplitude scintillation with S4 > 0.3 was observed concurrently in the same longitude range as the blob measured. This case study provides evidence of simultaneously observed GPS amplitude scintillations and a blob in situ, and it confirms that scintillations can be associated with plasma blobs in the low‐latitude ionosphere.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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