D-REGION AERONOMICAL CHANGES DEDUCED FROM STEEP INCIDENCE SUNRISE VLF PROPAGATION DATA,

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Abstract:

Some 12 months of near vertical incidence, mid-latitude VLF data, spanning the period April 1965 through June 1966, have been reduced and analyzed. Analysis of seasonal variations in sky wave amplitude prior to ground sunrise is presented here. These amplitude changes are accounted for in terms of D-region aeronomy variations. It is shown that early morning changes in Lyman-alpha radiation, nitric oxide and atomic oxygen can explain these preground sunrise amplitude effects. Author

Author(s):
Hayes, Daniel P. ; Sales, Gary S.
Author Organization(s):
LOWELL TECHNOLOGICAL INST RESEARCH FOUNDATION MASS
Supplementary Note:
Presented at the Conference on Meteorological and Chemical Factors in D-Region Aeronomy (3rd) Chicago, Ill., 23 Sep 68.
Pagination:
0012

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
F19628-68-C-0259
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*IONOSPHERE, ELECTRON DENSITY), (*RADIO WAVES, IONOSPHERIC PROPAGATION), SOLAR RADIATION, TRANSMITTER RECEIVERS, NITROGEN OXIDES, OXYGEN, IONIZATION, ULTRAVIOLET RADIATION, SKY BRIGHTNESS, VERY LOW FREQUENCY, CANADA
Field(s)/Group(s):
Atmospheric Physics, Radiofrequency Wave Propagation
Keyword(s):
LYMAN ALPHA RADIATION, SUNRISE, D REGION
Report Date:
1970 Jan 01