Whistler influence on the overall VLF wave intensity in the upper ionosphere

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F18%3A00490180" target="_blank" >RIV/68378289:_____/18:00490180 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1029/2017JA025137" target="_blank" >http://dx.doi.org/10.1029/2017JA025137</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2017JA025137" target="_blank" >10.1029/2017JA025137</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Whistler influence on the overall VLF wave intensity in the upper ionosphere

Popis výsledku v původním jazyce

We investigate the influence of lightning‐generated whistlers on the overall intensity of electromagnetic waves measured by the DEMETER spacecraft (2004 ‐ 2010, quasi Sun‐synchronous polar orbit with an altitude of about 700 km) at frequencies below 18 kHz. Whistler occurrence rate evaluated using an onboard neural network designed for automated whistler detection is used to distinguish periods of high and low whistler occurrence rates. It is shown that, especially during the night and particularly in the frequency‐geomagnetic latitude intervals with a low average wave intensity, contribution of lightning generated whistlers to the overall wave intensity is significant. At frequencies below 1 kHz, where all six electromagnetic wave components were measured during specific intervals, the study is accompanied by analysis of wave propagation directions. When we limit the analysis only to fractional‐hop whistlers, which propagate away from the Earth, we find a reasonable agreement with results obtained from the whole data set. This also confirms the validity of the whistler occurrence rate analysis at higher frequencies.

Název v anglickém jazyce

Whistler influence on the overall VLF wave intensity in the upper ionosphere

Popis výsledku anglicky

We investigate the influence of lightning‐generated whistlers on the overall intensity of electromagnetic waves measured by the DEMETER spacecraft (2004 ‐ 2010, quasi Sun‐synchronous polar orbit with an altitude of about 700 km) at frequencies below 18 kHz. Whistler occurrence rate evaluated using an onboard neural network designed for automated whistler detection is used to distinguish periods of high and low whistler occurrence rates. It is shown that, especially during the night and particularly in the frequency‐geomagnetic latitude intervals with a low average wave intensity, contribution of lightning generated whistlers to the overall wave intensity is significant. At frequencies below 1 kHz, where all six electromagnetic wave components were measured during specific intervals, the study is accompanied by analysis of wave propagation directions. When we limit the analysis only to fractional‐hop whistlers, which propagate away from the Earth, we find a reasonable agreement with results obtained from the whole data set. This also confirms the validity of the whistler occurrence rate analysis at higher frequencies.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA17-07027S" target="_blank" >GA17-07027S: Analýza elektromagnetických projevů bouřkové aktivity za použití pozemních a satelitních měření ve více bodech či více přístroji současně</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Geophysical Research: Space Physics

ISSN

2169-9380

e-ISSN

—

Svazek periodika

123

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

5648-5660

Kód UT WoS článku

000442664300028

EID výsledku v databázi Scopus

2-s2.0-85050892143