Investigating Short Electric Field Pulses using MAVEN/LPW 2015 Observations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10477985" target="_blank" >RIV/00216208:11320/23:10477985 - isvavai.cz</a>

Výsledek na webu

<a href="https://physics.mff.cuni.cz/wds/proc/pdf23/WDS23_07_f2_Ijaz.pdf" target="_blank" >https://physics.mff.cuni.cz/wds/proc/pdf23/WDS23_07_f2_Ijaz.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Investigating Short Electric Field Pulses using MAVEN/LPW 2015 Observations

Popis výsledku v původním jazyce

This study focuses on analyzing short (millisecond) pulses detected by theLangmuir Probe and Waves (LPW) instrument onboard the Mars Atmosphere and VolatileEvolution (MAVEN) spacecraft. We present a statistical analysis of 360,000 mediumfrequency burst electric field waveforms recorded in 2015, the study aims to identifyand analyze the characteristics of these transient signals. We use an automatic routineto detect waveforms with rapid fluctuations in the electric field data, this comprises over12,000 events in the dipole and nearly 5,000 in the monopole configuration. We introducefour key parameters for event identification: the ratio of rising and decay time (t1/t2or t2/t1) and the ratio of positive and negative part of the pulse (A1/A2 or A2/A1).The analysis particularly focuses on the dipole data, which predominantly consist ofbipolar events, typically associated with dust impacts. These events are detected when thespacecraft is charged negatively and have distinct shapes that differ significantly from thoserecorded when the spacecraft is positively charged, indicating the influence of spacecraft&apos;spotential on the shape of the signal in dipole configuration. The peak around 200 kmand the absence of events above 2000 km suggests that these pulses might not stem frominterplanetary dust. We observe strong day-to-day variations in the occurrence of potentialdust events, a pattern not corresponding to the Martian seasonal period or to the changesin MAVEN&apos;s orbital periapsis. Our findings contribute to the current understanding ofpotential dust impact signals and raises important questions regarding the influence ofspacecraft&apos;s potential on detection mechanisms, interference and Electrostatic SolitaryWaves (ESWs) effects in event identification, and the origin of these pulses.

Název v anglickém jazyce

Investigating Short Electric Field Pulses using MAVEN/LPW 2015 Observations

Popis výsledku anglicky

This study focuses on analyzing short (millisecond) pulses detected by theLangmuir Probe and Waves (LPW) instrument onboard the Mars Atmosphere and VolatileEvolution (MAVEN) spacecraft. We present a statistical analysis of 360,000 mediumfrequency burst electric field waveforms recorded in 2015, the study aims to identifyand analyze the characteristics of these transient signals. We use an automatic routineto detect waveforms with rapid fluctuations in the electric field data, this comprises over12,000 events in the dipole and nearly 5,000 in the monopole configuration. We introducefour key parameters for event identification: the ratio of rising and decay time (t1/t2or t2/t1) and the ratio of positive and negative part of the pulse (A1/A2 or A2/A1).The analysis particularly focuses on the dipole data, which predominantly consist ofbipolar events, typically associated with dust impacts. These events are detected when thespacecraft is charged negatively and have distinct shapes that differ significantly from thoserecorded when the spacecraft is positively charged, indicating the influence of spacecraft&apos;spotential on the shape of the signal in dipole configuration. The peak around 200 kmand the absence of events above 2000 km suggests that these pulses might not stem frominterplanetary dust. We observe strong day-to-day variations in the occurrence of potentialdust events, a pattern not corresponding to the Martian seasonal period or to the changesin MAVEN&apos;s orbital periapsis. Our findings contribute to the current understanding ofpotential dust impact signals and raises important questions regarding the influence ofspacecraft&apos;s potential on detection mechanisms, interference and Electrostatic SolitaryWaves (ESWs) effects in event identification, and the origin of these pulses.

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

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

WDS&apos;23 Proceedings of Contributed Papers - Physics

ISBN

978-80-7378-503-1

ISSN

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e-ISSN

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Počet stran výsledku

14

Strana od-do

50-63

Název nakladatele

Matfyzpress

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

30. 5. 2023

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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