2009
DOI: 10.4401/ag-3346
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TEC and foF2 variations: preliminary results

Abstract: Investigation of the relationship between TEC and (foF2) 2 shows that although they are highly correlated, a «hysteresis» effect exists between them. The slab thickness is greater before than after mid-day for equal cosχ values. Moreover, a comparison of the calculated upper and lower quartiles of variability in TEC, foF2 and Nmax, respectively shows that the variability of TEC lies between those of foF2 and Nmax depending on the level of solar activity.

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Cited by 19 publications
(14 citation statements)
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“…In this way, a worse performance of the method was expected, when regions and periods with different ionospheric gradients are considered. More details on the influence of slab thickness in the relations between foF 2 and VTEC can be found in Spalla and Ciraolo [19], Leitinger et al [20], and Kouris et al [21]. Regarding the general performance of GIMs, it is worth mentioning the consistency of most of the products, presenting similar behavior, mainly if only the final products are considered, similar to other GIM assessment techniques [2].…”
Section: Daily and Weekly Analysismentioning
confidence: 80%
See 3 more Smart Citations
“…In this way, a worse performance of the method was expected, when regions and periods with different ionospheric gradients are considered. More details on the influence of slab thickness in the relations between foF 2 and VTEC can be found in Spalla and Ciraolo [19], Leitinger et al [20], and Kouris et al [21]. Regarding the general performance of GIMs, it is worth mentioning the consistency of most of the products, presenting similar behavior, mainly if only the final products are considered, similar to other GIM assessment techniques [2].…”
Section: Daily and Weekly Analysismentioning
confidence: 80%
“…The method of assessment proposed in this paper is based on the correlation between the critical frequency at the F 2 layer and the VTEC [19][20][21]. Figure 2 presents plots comparing the behavior of foF 2 measured by two pairs of ionosondes and the respective VTEC values estimated using two GIM products (CODG and UQRG) for the ionosonde positions.…”
Section: Methodsmentioning
confidence: 99%
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“…Because of the time-varying and dispersive characteristics of the ionosphere, the working parameters for the HF communication systems and satellite communications must be adaptively adjusted according to the current state of the ionosphere [1]. During the ionospheric disturbance, the variations of the foF2 play a significant impact on wireless communication [2,3], which may lead to the degradation or interruption of the information quality such as communication, navigation, measurement, and remote sensing [4,5]. Therefore, forecasting foF2 has become an important concern in ionospheric studies and applications to provide effective support and decision for high-frequency radars and shortwave communication systems.…”
Section: Introductionmentioning
confidence: 99%