Forecasting the Appearance and Evolution of Ionospheric Irregularities and Structures: Their Effects on AF Systems

Valladares, C. E.; Carrano, Charles S.; Groves, K. M.; Paznukhov, V.; Doherty, Patricia H.

doi:10.21236/ad1002455

Cited by 2 publications

(1 citation statement)

References 24 publications

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“…With a view to further understand the propagation direction of GWs observed at ionospheric altitudes by GPS VTEC observations, the GPS stations were arranged in the SE to NW direction, and TEC perturbations from individual stations were plotted in Figure 9 as a function of UT (Valladares et al, 2015). Similar to Figure 8, the TEC perturbations were derived using the VTEC values obtained from PRN 23.…”

Section: Discussionmentioning

confidence: 99%

On the Seeding of Periodic Equatorial Plasma Bubbles by Gravity Waves Associated With Tropical Cyclone: A Case Study

Ajith

Ram

et al. 2020

JGR Space Physics

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Understanding the day-today variability of equatorial plasma bubble (EPB) irregularities has been a major challenge for many decades that makes the deterministic prediction of EPBs remain elusive. In the present study, we report a case of intense and periodic EPBs observed during 8 and 9 April 2013 by the 47-MHz Equatorial Atmosphere Radar at Kototabang, Indonesia. The periodic EPBs separated by about 200-250 km were initiated before sunset. The presunset onset and development of these periodic EPBs were discussed in light of the gravity waves (GWs) excited in connection with the deep convection due to the tropical cyclone (TC) Victoria. The outgoing long-wave radiation measurement by very high-resolution radiometer (VHRR) onboard Indian meteorological satellite Kalpana-1 shows the occurrence of deep convective activity during these days. The presence of upward propagating GWs from the deep convective region associated with TC Victoria was confirmed using the GPS radio occultation (GPS-RO) observations in the troposphere and stratosphere. The GW signatures at ionospheric altitudes were also observed from the Ionosonde observations over magnetic equator, and medium-scale (~300 km) GWs were observed from the GPS-TEC (Total Electron Content) data near to the magnetic equator and cyclone center. From the GW parameters observed from GPS-TEC and GPS-RO, we surmise that the secondary GWs generated by the dissipation of primary GWs associated with TC Victoria could have served as a seeding source on the generation of periodic EPBs during these two consecutive days.

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Section: Discussionmentioning

confidence: 99%

On the Seeding of Periodic Equatorial Plasma Bubbles by Gravity Waves Associated With Tropical Cyclone: A Case Study

Ajith

Ram

et al. 2020

JGR Space Physics

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show abstract

Comparative analysis of the GNSS-TEC methods for determining effective height of the ionosphere

Phillip,

Claude,

Geoffrey

et al. 2024

Advances in Space Research

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Forecasting the Appearance and Evolution of Ionospheric Irregularities and Structures: Their Effects on AF Systems

Abstract: This report is published in the interest of scientific and technical information exchange, and its publication does not constitute the Government's approval or disapproval of its ideas or findings.

Cited by 2 publications

References 24 publications

On the Seeding of Periodic Equatorial Plasma Bubbles by Gravity Waves Associated With Tropical Cyclone: A Case Study

On the Seeding of Periodic Equatorial Plasma Bubbles by Gravity Waves Associated With Tropical Cyclone: A Case Study

Comparative analysis of the GNSS-TEC methods for determining effective height of the ionosphere

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