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The VLF network GIFDS for a ground-based monitoring of solar disturbances

Banyś (geb. Wenzel), Daniela and Wenzel, David and Hansen, Marc and Heinrich, Lutz and Hoque, Mohammed Mainul (2022) The VLF network GIFDS for a ground-based monitoring of solar disturbances. International Workshop on GNSS Ionosphere, 26. - 28. Sep. 2022, Neustrelitz, Germany.

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It has been observed that solar flares reflect in the amplitude and phase of radio measurements. As these bursts of X-ray radiation may be harmful, the German Aerospace Center (DLR) operates the Global Ionospheric Flare Detection System (GIFDS) to continuously monitor from the ground the current state of the ionosphere's D region, which is the linking layer affected from the outside in the relevant solar spectral range and in turn taking effect on steadily available VLF signals. A major issue in flare recognition based on the radio signal changes is the non-constant progression of the quiet level over the day. That's why a flare may yield different pictures depending on the time it hits the ionosphere. Taking care of the diurnal variation is crucial for setting up a system capable of raising alerts. In addition, investigating seasonal changes is important also for understanding Earth-originating anomalies like the "October effect", a sharp decrease in signal strength during fall in mid-latitude regions (subject to the project "Analysis of the MEsosphere and Lower Ionosphere fall Effect", AMELIE). Proper flare detection and size estimation rely on identifying the normal amplitude level. As the measurements could suffer also from small-scale oscillations, the instruments were improved and harmonized to suppress noise, resulting in the compact GIFDS receiver.

Item URL in elib:https://elib.dlr.de/188952/
Document Type:Conference or Workshop Item (Speech)
Title:The VLF network GIFDS for a ground-based monitoring of solar disturbances
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Banyś (geb. Wenzel), DanielaUNSPECIFIEDhttps://orcid.org/0000-0001-6623-6612UNSPECIFIED
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:very low frequencies, SID, sudden ionospheric disturbances, solar flares, October effect
Event Title:International Workshop on GNSS Ionosphere
Event Location:Neustrelitz, Germany
Event Type:international Conference
Event Dates:26. - 28. Sep. 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Solar-Terrestrial Physics SO
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics
Deposited By: Banyś (geb. Wenzel), Daniela
Deposited On:14 Oct 2022 12:18
Last Modified:29 Mar 2023 00:52

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