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Radio and Electronic Engineer

Issue 1.2 • Date January/February 1975

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Displaying Results 1 - 17 of 17
  • The past and the future

    Publication Year: 1975
    IEEE is not the copyright holder of this material | PDF file iconPDF (115 KB)
    Freely Available from IEEE
  • Ionospheric radio communication

    Publication Year: 1975
    IEEE is not the copyright holder of this material | PDF file iconPDF (139 KB)
    Freely Available from IEEE
  • Developments in ionospheric physics since 1957

    Publication Year: 1975
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1113 KB)

    The year 1957 marked the beginning of the International Geophysical Year and the satellite era, and this review describes the most important developments in ionospheric science since then. The discoveries made by different techniques concerning the nature and formation of the D, E and F layers and their various anomalies are considered and the relationship between the ionosphere and the region abo... View full abstract»

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  • Solar-terrestrial relations and short-term ionospheric forecasting

    Publication Year: 1975, Page(s):11 - 30
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (4926 KB)

    Since the ionosphere is produced by the quiet Sun and disturbed by the active Sun, short-term ionospheric forecasting is discussed in three stages: (1) forecasting the solar activity; (2) the relations between the solar activity and geophysical disturbances, particularly magnetic storms, daylight fadeouts and polar cap absorption; (3) the effects of these geophysical disturbances on the ionosphere... View full abstract»

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  • Long-term h.f. propagation predictions for radio-circuit planning

    Publication Year: 1975, Page(s):31 - 41
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1249 KB)

    When an h.f. radio circuit is being planned, the specification of the transmitter frequency range and radiated power and the choice of transmitting and receiving aerials are determined from propagation considerations. The factors involved in prediction techniques for the case of ionospheric signals are outlined. Current procedures used internationally and their proposed future improvements are des... View full abstract»

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  • The CCIR and the ionosphere

    Publication Year: 1975, Page(s):42 - 46
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (740 KB)

    A brief history is given of the CCIR with its Study Group structure, in particular Study Group 6 on Ionospheric Propagation. The system of documentation is described with special reference to the Reports which form a most valuable source of information on ionospheric propagation in relation to radio communication. The nine Working Groups under which the work of Study Group 6 is organized at the In... View full abstract»

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  • The propagation of l.f. and v.l.f. radio waves with reference to some systems applications

    Publication Year: 1975, Page(s):47 - 61
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1978 KB)

    An outline is presented of the theoretical methods available for determining the propagation characteristics of v.l.f. and l.f. waves for both long and short transmission paths. Attention is drawn to the differences between the ray-hop and wave guide mode theories which have been applied to these frequency bands. The experimental study of v.l.f./l.f. propagation is discussed and the variations in ... View full abstract»

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  • Ionospheric perturbations and their effects on the accuracy of h.f. direction finders

    Publication Year: 1975, Page(s):63 - 73
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1423 KB)

    The principles of high frequency direction finding are briefly described and the main sources of error in these systems discussed. The deviations in bearing produced by travelling ionospheric disturbances (t.i.d.s) are considered in detail since these errors are particularly difficult to predict and correct. General background information on the physics of t.i.d. phenomena has been included and at... View full abstract»

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  • H.F. heating circuits and techniques

    Publication Year: 1975
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (188 KB)

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  • A digital generator for pattern drawing applications

    Publication Year: 1975, Page(s):75 - 79
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB)

    The generator may be used off-line or on-line to a computer. It is used principally for integrated-circuit mask generation but is also suitable for other precision pattern-drawing applications. The generator accepts commands to draw line segments, to outline or scan rectangles, and to replicate patterns in regular arrays (step-and-repeat). The output of the generator comprises x and y co-ordinate-... View full abstract»

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  • Statistics of the electronics industry

    Publication Year: 1975
    IEEE is not the copyright holder of this material | PDF file iconPDF (189 KB)
    Freely Available from IEEE
  • Consumer confusion. If music be the food of lovely machinery, play on...

    Publication Year: 1975
    IEEE is not the copyright holder of this material | PDF file iconPDF (176 KB)
    Freely Available from IEEE
  • Obituary. Professor Richard Theile, Dr.Phil.

    Publication Year: 1975
    IEEE is not the copyright holder of this material | PDF file iconPDF (150 KB)
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  • Letter to the Editor: A.C.U.C.E. memorial to Professor Emrys Williams

    Publication Year: 1975
    IEEE is not the copyright holder of this material | PDF file iconPDF (150 KB)
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  • IMEKO VII

    Publication Year: 1975
    IEEE is not the copyright holder of this material | PDF file iconPDF (150 KB)
    Freely Available from IEEE
  • 1974 MacRobert Award for the Manufacture of High Activity Catalysts

    Publication Year: 1975
    IEEE is not the copyright holder of this material | PDF file iconPDF (175 KB)
    Freely Available from IEEE
  • V.H.F.-F.M. broadcasting and Dolby `B¿

    Publication Year: 1975
    IEEE is not the copyright holder of this material | PDF file iconPDF (175 KB)
    Freely Available from IEEE