NDLI: Abnormal Ionization in the E Region of the Ionosphere

Content Provider	IEEE Xplore Digital Library
Author	Pierce, J.A.
Copyright Year	1913
Abstract	Records of the field strength of 10-megacycle signals have been made at a distance of 30 kilometers from the transmitter. "Bursts" of received energy, of a few minutes' duration, were noted at times when no reflection from the F layer was present. When the density of ionization in the F layer was above the critical value for this frequency, occasional short periods of strong absorption at a low level have greatly reduced the strength of the reflected signal. Both of these phenomena are apparently due to small volumes of dense ionization in the E region, and they are consistent with a theory that such local ionization is caused by the transit of a single large meteor. Examination of astronomical data on the number and size of meteors shows that this is a possible explanation of the abnormally intense ionization frequently observed in the E layer. The same recently accessible data indicate that the constant meteoric bombardment of the atmosphere can maintain a continuous background level of ionization in the E region of about the magnitude which is observed during the night.
Starting Page	892
Ending Page	908
Page Count	17
File Size	1732412
File Format	PDF
ISSN	07315996
Volume Number	26
Issue Number	7
Language	English
Publisher Date	1938-07-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ionization Ionosphere Frequency Transmitters Reflection Absorption Laboratories Extraterrestrial measurements Scattering Atmosphere
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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