Do the Antennas of DEMETER Spacecraft Detect Dust Impacts?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10493047" target="_blank" >RIV/00216208:11320/24:10493047 - isvavai.cz</a>

Výsledek na webu

<a href="https://physics.mff.cuni.cz/wds/proc/pdf24/WDS24_05_f2_Ijaz.pdf" target="_blank" >https://physics.mff.cuni.cz/wds/proc/pdf24/WDS24_05_f2_Ijaz.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Do the Antennas of DEMETER Spacecraft Detect Dust Impacts?

Popis výsledku v původním jazyce

This study investigates transient pulses detected by the electric field instrument,ICE (Instrument Champ Electrique), onboard the DEMETER spacecraft. Using anautomated identification algorithm, we identified and analyzed 2000 short pulses recordedin 2005 and 2010. The spatial distribution of these signals, primarily localized over SouthAmerica and near the South Atlantic Anomaly (SAA), contradicts the initial assumptionthat they are generated by dust impacts. The absence of temporal and seasonal variationseliminates other potential sources, such as earthquakes and lightning. Our analysis suggeststhat energetic electrons are the most plausible explanation for these pulses, supported by thestrong spatial correlation between the detected electric field events and high-energy electronfluxes observed by the IDP (Instrument for the Detection of Particle) instrument onboardDEMETER. The equal distribution of pulse polarities and the detection of similar pulsesin magnetic field observations further support this conclusion. These findings highlightthe importance of carefully evaluating and interpreting pulses attributed to dust impacts,contributing to more accurate interpretations and a better understanding of dust impactsignals in various space environments.

Název v anglickém jazyce

Do the Antennas of DEMETER Spacecraft Detect Dust Impacts?

Popis výsledku anglicky

This study investigates transient pulses detected by the electric field instrument,ICE (Instrument Champ Electrique), onboard the DEMETER spacecraft. Using anautomated identification algorithm, we identified and analyzed 2000 short pulses recordedin 2005 and 2010. The spatial distribution of these signals, primarily localized over SouthAmerica and near the South Atlantic Anomaly (SAA), contradicts the initial assumptionthat they are generated by dust impacts. The absence of temporal and seasonal variationseliminates other potential sources, such as earthquakes and lightning. Our analysis suggeststhat energetic electrons are the most plausible explanation for these pulses, supported by thestrong spatial correlation between the detected electric field events and high-energy electronfluxes observed by the IDP (Instrument for the Detection of Particle) instrument onboardDEMETER. The equal distribution of pulse polarities and the detection of similar pulsesin magnetic field observations further support this conclusion. These findings highlightthe importance of carefully evaluating and interpreting pulses attributed to dust impacts,contributing to more accurate interpretations and a better understanding of dust impactsignals in various space environments.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

WDS&apos;24 Proceedings of Contributed Papers - Physics

ISBN

978-80-7378-520-8

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

38-44

Název nakladatele

Matfyzpress

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

4. 6. 2024

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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