NDLI: Digital recording and short-term prediction of oblique ionospheric propagation

Content Provider	IEEE Xplore Digital Library
Author	Ames, J. Egan, R.
Copyright Year	1963
Abstract	Synchronized oblique step-frequency ionosphere sounding are electrically recorded on punched paper tape without the intervening medium of photographic film. The resulting data are then automatically analyzed to yield statistics on the MOF, LOF, and MPF (a frequency below which multipath exceeds a pre-set limit). The MOF time autocorrelation decays smoothly to 0.87 in 9 minutes and to 0.5 in 65 minutes with minor maxima during the day-night transition periods. The MOF standard deviation between data observed on different days is higher daring the day than at night, and is approximately equal to 0.17 times the corresponding MOF mean value. The electrically analyzed innograms are processed in a manner simulating real time prediction of the above quantities, and their variances. The observed reduction of MOF variance is 0.54 at a prediction lead of 10 minutes, rising to 0.89 at 60 minutes, and is within 5 percent of the limiting values determined by the autocorrelation of the data. A technique for applying the basic propagation predictions to real time frequency management is simulated on a large computer, and reduced to practice on a small sounder accessory computer, with encouraging results.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	382
Ending Page	389
Page Count	8
File Size	787353
File Format	PDF
ISSN	0018926X
Volume Number	15
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1967-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Digital recording Acoustic propagation Autocorrelation Predictive models Frequency synchronization Ionosphere Statistical analysis Analysis of variance Analytical models Computational modeling
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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