On the Origin of Ionospheric Hiss: A Conjugate Observation

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dc.contributor.authorZhima, Zerenen_US
dc.contributor.authorChen, Lunjinen_US
dc.contributor.authorXiong, Yingen_US
dc.contributor.authorCao, Jinbinen_US
dc.contributor.authorFu, Huishanen_US
dc.contributor.utdAuthorChen, Lunjinen_US
dc.date.accessioned2018-11-05T21:12:32Z
dc.date.available2018-11-05T21:12:32Z
dc.date.created2017-11-24en_US
dc.date.issued2018-11-05
dc.description.abstractWe present a conjugate observation on whistler mode electromagnetic hiss from the low Earth orbit satellite Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) and the high-altitude elliptical orbit spacecraft Time History of Events and Macroscale Interactions during Substorms (THEMIS). The conjugate observation was performed at 14:51:10 to 15:12:00 UT on 15 June 2010, when DEMETER was flying across the L shell region from ~1.39 to 2.80 at an altitude of ~660 km; meanwhile, THEMIS probes were passing through the L shell region from ~1.64 to 1.91 at altitudes from ~1.6 to 2.0 R_E. The conjugated observations demonstrate similar time-frequency structures between the ionospheric hiss (~350 to 800 Hz) captured by DEMETER and the plasmaspheric hiss (~350 to 900 Hz) recorded by THEMIS probes, including similar peak frequencies (~500 to 600 Hz), similar lower cutoff frequencies (~350 to 400 Hz), and upper cutoff frequencies (~730 to 800 Hz). The wave vector analyses show that the ionospheric hiss propagates obliquely downward to the Earth and slightly equatorward with right-handed polarization, suggesting that its source comes from higher altitudes. Ray tracing simulations with the constraint of observations verify that the connection between ionospheric and plasmaspheric hiss is physically possible through wave propagation. This study provides direct observational evidence to support the mechanism that high-altitude plasmaspheric hiss is responsible for the generation of low-altitude ionospheric hiss.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.description.sponsorship"This work was supported by the NSFC grants 41574139, 41204136, and 41674164; ISTCP 2014DFR21280, the APSCO‐SP/PM‐EARTHQUAKE Project and ISSI‐BJ project, and the Fundamental Research Funds for earthquake research 2014IES010203. Lunjin Chen acknowledges the support of NSF grant AGS 1405041."en_US
dc.identifier.bibliographicCitationZhima, Zeren, Lunjin Chen, Ying Xiong, Jinbin Cao, et al. 2017. "On the origin of Ionospheric hiss: A conjugate observation." Journal of Geophysical Research—Space Physics 122(11): 11784-11793, doi:10.1002/2017JA024803en_US
dc.identifier.issn2169-9380en_US
dc.identifier.issue11en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/6290
dc.identifier.volume122en_US
dc.language.isoenen_US
dc.publisherAmer Geophysical Unionen_US
dc.relation.urihttp://dx.doi.org/10.1002/2017JA024803
dc.rights©2017 American Geophysical Union. All Rights Reserved.en_US
dc.sourceJournal of Geophysical Research—Space Physics
dc.subjectIonosphere--Hiss (Radio meteorology)en_US
dc.subjectRadiationen_US
dc.subjectPlasmasphere--Hiss (Radio meterorologyen_US
dc.subjectMagnetic fieldsen_US
dc.subjectElectronsen_US
dc.titleOn the Origin of Ionospheric Hiss: A Conjugate Observationen_US
dc.type.genrearticleen_US

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