HF Sky-wave Measurements and Predictions PDF Download
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Author: L. L. Proctor
Publisher:
ISBN:
Category : Ionospheric radio wave propagation
Languages : en
Pages : 100
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Book Description
Measurements for the month of April 1969 were made on a 2.666-MHz east-west path between Long Branch, Illinois, and Boulder, Colorado, to validate current ESSA/ITS prediction programs. After the difference between the measured observations and the computer calculations had been determined, additional path calculations centered about the Boulder receiving site were made to identify potential interfering sources. Point-to-point calculations along quadrature radials were used, with the range being incremented five times along each radial between the limits of 500 and 5000 km. The analysis determines the required transmitter power to produce a CW signal via the predominant mode which is 90 percent reliable and 12 dB above the controlling noise (atmospheric, man-made, galactic, or a combination). The averaged night values of required transmitter power including an 8-dB correction factor found from the measured observations, are tabulated by month as a function of both the bearing and range.
Author: L. L. Proctor
Publisher:
ISBN:
Category : Ionospheric radio wave propagation
Languages : en
Pages : 100
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Book Description
Measurements for the month of April 1969 were made on a 2.666-MHz east-west path between Long Branch, Illinois, and Boulder, Colorado, to validate current ESSA/ITS prediction programs. After the difference between the measured observations and the computer calculations had been determined, additional path calculations centered about the Boulder receiving site were made to identify potential interfering sources. Point-to-point calculations along quadrature radials were used, with the range being incremented five times along each radial between the limits of 500 and 5000 km. The analysis determines the required transmitter power to produce a CW signal via the predominant mode which is 90 percent reliable and 12 dB above the controlling noise (atmospheric, man-made, galactic, or a combination). The averaged night values of required transmitter power including an 8-dB correction factor found from the measured observations, are tabulated by month as a function of both the bearing and range.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 980
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Book Description
Author: United States. Environmental Science Services Administration
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
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Book Description
Author:
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 388
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Book Description
Author: Kenneth Davies
Publisher: IET
ISBN: 9780863411861
Category : Science
Languages : en
Pages : 612
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Book Description
This introductory text replaces two earlier publications (Davies 1965, 1969). Among the topics: characteristics of waves and plasma, the solar-terrestrial system, the Appleton formula, radio soundings of the ionosphere, morphology of the ionosphere, oblique propagation, importance of amplitude and phase, earth-space propagation. Annotation copyrighted by Book News, Inc., Portland, OR
Author:
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 940
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Book Description
Author: M. D. Earle
Publisher: Springer Science & Business Media
ISBN: 1468433997
Category : Science
Languages : en
Pages : 367
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Book Description
Waves critically affect man in coastal regions, including the open coasts and adjacent continental shelves. Preventing beach erosion, designing and building structures, designing and operating ships, providing marine forecasts, and coastal planning are but a few examples of projects for which extensive information about wave conditions is critical. Scientific studies, especially those in volving coastal processes and the development of better wave prediction models, also require wave condition information. How ever, wave conditions along and off the coasts of the United States have not been adequately determined. The main categories of available wave data are visual estimates of wave conditions made from ships at sea, scientific measurements of waves made for short time periods at specific locations, and a small number of long-term measurements made from piers or offshore platforms. With these considerations in mind, the National Ocean Survey of the National Oceanic and Atmospheric Administration sponsored the Ocean Wave Climate Symposium at Herndon, Virginia, July 12-14, 1977. This volume contains papers presented at this symposium. A goal of the symposium was to establish the foundations for a com prehensive and far-sighted wave measurement and analysis program to fully describe the coastal wave climate of the United States. Emphasis was placed on ocean engineering and scientific uses of wave data, existing wave monitoring programs, and modern measure ment techniques which may provide currently needed data.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1386
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Book Description
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1666
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Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Author:
Publisher:
ISBN:
Category : Antarctica
Languages : en
Pages : 562
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Book Description
