Sporadic E layers; history and recent observations

Whitehead J.D. (1990) Sporadic E layers; history and recent observations. Advances in Space Research, 10 10: 85-91. doi:10.1016/0273-1177(90)90013-P

Author Whitehead J.D.
Title Sporadic E layers; history and recent observations
Journal name Advances in Space Research   Check publisher's open access policy
ISSN 0273-1177
Publication date 1990-01-01
Sub-type Article (original research)
DOI 10.1016/0273-1177(90)90013-P
Open Access Status
Volume 10
Issue 10
Start page 85
End page 91
Total pages 7
Language eng
Subject 1912 Space and Planetary Science
3103 Astronomy and Astrophysics
Abstract Sporadic E is itself a stratification within the E-region. The seasonal, diurnal and geographic distributions are not easily explained on the basis of the popular windshear theory. Stratification of mid-latitude sporadic E into 2 or more layers was observed as early as 1956 and preferred heights for sporadic E layers evident from rocket measurements noted in 1968, and from incoherent backscatter in 1973. Recently phase ionosonde measurements and incoherent backscatter observations have provided further data. There is evidence of preferred heights near 97 and 102.5 km; a possible though not completely satisfactory explanation is that internal gravity waves are reflected from above the E-region with an amplitude reflection coefficient of more than 50%. Simultaneous existence of two layers within a kilometre height of each other may be due to different metallic ion compositions. Such layers 2 km apart have been observed by incoherent backscatter and require the existence of large electric fields.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
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Created: Tue, 05 Jul 2016, 11:19:22 EST by System User