DOI: 10.1002/2013GL056112
论文题名: Radio-tomographic images of postmidnight equatorial plasma depletions
作者: Hei M.A. ; Bernhardt P.A. ; Siefring C.L. ; Wilkens M.R. ; Huba J.D. ; Krall J.F. ; Valladares C.E. ; Heelis R.A. ; Hairston M.R. ; Coley W.R. ; Chau J.L. ; De La Jara C.
刊名: Geophysical Research Letters
ISSN: 0094-10521
EISSN: 1944-10252
出版年: 2014
卷: 41, 期: 1 起始页码: 13
结束页码: 19
语种: 英语
英文关键词: C/NOFS satellite
; CERTO beacon
; equatorial ionosphere
; equatorial plasma depletions
; tomography
Scopus关键词: Bubble density
; CERTO beacon
; Equatorial ionosphere
; equatorial plasma depletions
; High resolution
; In-situ instruments
; Radio tomography
; Total electron content
; Electric fields
; F region
; Ionospheric measurement
; Satellites
; Tomography
; Plasmas
; airglow
; altitude
; electric field
; ionosphere
; plasma
; radio wave
; satellite imagery
; Peru
英文摘要: For the first time, equatorial plasma depletions (EPDs) have been imaged in the longitude-altitude plane using radiotomography. High-resolution (~10 km) reconstructions of electron density were derived from total electron content (TEC) measurements provided by a receiver array in Peru. TEC data were obtained from VHF/UHF signals transmitted by the Coherent Electromagnetic Radio Tomography (CERTO) beacon on the C/NOFS satellite. EPDs generated premidnight were observed near dawn. On one night, the bubble densities were highly reduced, 100-1000 km wide, and embedded within a layerlike ionosphere. Three nights later, the EPDs exhibited similar features but were embedded in a locally uplifted ionosphere. The C/NOFS in situ instruments detected a dawn depletion where the reconstruction showed lifted EPDs, implying that the postmidnight electric fields raised sections of ionosphere to altitudes where embedded/reactivated fossil EPDs were detected as dawn depletions. Satellites flying under domelike distortions of the ionosphere may observe these distortions as broad plasma decreases (BPDs). Key Points First-ever radiotomographic reconstructions of equatorial plasma depletions Dawn depletions detected in situ when predawn E fields raise F layer sections Broad plasma decreases detected when satellites fly under the raised sections ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896696810&doi=10.1002%2f2013GL056112&partnerID=40&md5=fd17a08f0f4bfe9082867669d11c2af3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7785
Appears in Collections: 气候减缓与适应
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作者单位: Sotera Defense Solutions, Herndonm, VA, United States
Recommended Citation:
Hei M.A.,Bernhardt P.A.,Siefring C.L.,et al. Radio-tomographic images of postmidnight equatorial plasma depletions[J]. Geophysical Research Letters,2014-01-01,41(1).