Statistical investigation of VLF quasiperiodic emissions measured by the DEMETER spacecraft

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10289758" target="_blank" >RIV/00216208:11320/14:10289758 - isvavai.cz</a>
Alternative codes found
RIV/68378289:_____/14:00436387
Result on the web
<a href="http://dx.doi.org/10.1002/2013JA019731" target="_blank" >http://dx.doi.org/10.1002/2013JA019731</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/2013JA019731" target="_blank" >10.1002/2013JA019731</a>

Result language
angličtina
Original language name
Statistical investigation of VLF quasiperiodic emissions measured by the DEMETER spacecraft
Original language description
We present a survey of quasiperiodic (QP) ELF/VLF emissions detected onboard the DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite (altitude of about 700km, nearly Sun-synchronous orbit at 10:30/22:30 LT). Six years of data have been visually inspected for the presence of QP emissions with modulation periods higher than 10s and with frequency bandwidths higher than 200Hz. It is found that these QP events occur in about 5% of daytime half orbits, while they are basically absent during the night. The events occur predominantly during quiet geomagnetic conditions following the periods of enhanced geomagnetic activity. Their occurrence and properties are systematically analyzed. QP emissions occur most often atfrequencies from about 750Hz to 2kHz, but they may be observed at frequencies as low as 500Hz and as high as 8kHz. Modulation periods of QP events may range from about 10 to 100s, with typical values of 20s. Frequency drifts of the ident
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BL - Plasma physics and discharge through gases
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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