On the use of ƒ-min as an index of ionospheric absorption

Kotadia, K. M.; Gupta, A. B.

doi:10.1016/0021-9169(76)90097-0

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…By using the data of the digisonde, we found that the noon IPTAR was stronger in summer than that in winter at high latitude, which agreed with the results obtained by Appleton and Piggot at 4 MHz in UK and by Kotadia et al at frequency of 1.8-3.0 MHz at high latitude for partial absorption using A1/A3 method [4,11] . However, our results were at the frequencies from f min to foF2 and for total absorption.…”

Section: Discussionsupporting

confidence: 89%

“…Thus the difference between the nighttime and daytime occurrence rates reduced. The diurnal variation of IP-TAR also implied that the noon IPTAR was stronger in summer than that in winter, which agreed with the results using A1/A3 method at high latitude [4,11] . Fig.…”

Section: Analysis and Resultssupporting

confidence: 84%

“…Method A3 can carry out continuous observation from low to high frequency band. Using the f min data, Kotadia et al also studied the ionospheric plasma noon absorption at frequency of 1.8-3.0 MHz at high latitude [11] . Based on the results of frequencysweep tests, Ramanamurty et al reported that the absorption at low-frequency was stronger [12] .…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Total Absorption of Radio Waves in High Latitude Ionosphere

Shi¹,

Wang²,

Wei³

et al. 2014

Plasma Sci. Technol.

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Using the digisonde data observed at ionospheric station Norilsk (Dip lat. 60 o N) in 2006, a statistical study on the characteristics of the ionospheric plasma total absorption of radio waves (IPTAR) was performed. In the winter and some months of equinox, the IPTAR mainly occurred in the nighttime and the highest occurrence rate could be up to 90%. In the summer, the occurrence was relatively low and the differences between nighttime and daytime occurrence reduced. The total duration of IPTAR seemed longer around the winter than that around the summer. The occurrence of IPTAR events ascended as the Kp index increased. The frequent precipitation of energetic particles into the ionospheric plasma in the auroral belt may be the main cause of the IPTAR events.

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Section: Discussionsupporting

confidence: 89%

Section: Analysis and Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Investigation of Total Absorption of Radio Waves in High Latitude Ionosphere

Shi¹,

Wang²,

Wei³

et al. 2014

Plasma Sci. Technol.

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show abstract

“…constant power and receiver sensitivity) the f min values (as used in Fig. 15) contain information on ionospheric absorption (Kotadia and Gupta, 1976). One part of this absorption is produced near the reflection height (deviative absorption) in the lower E region, and the other part in the D region (non-deviative absorption).…”

Section: Article In Pressmentioning

confidence: 99%