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IEEE Aerospace and Electronic Systems Magazine

Issue 8 • Date Aug. 1996

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Displaying Results 1 - 9 of 9
  • National Radar Conference

    Publication Year: 1996
    Request permission for commercial reuse | PDF file iconPDF (523 KB)
    Freely Available from IEEE
  • Computational intelligence and soft computing for space applications

    Publication Year: 1996, Page(s):8 - 10
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    Systems using computational intelligence and soft computing have been successfully developed for many industrial and space applications. These systems seek to emulate the type of reasoning that humans perform when solving complex tasks. The field of soft computing, as defined by Zadeh-the inventor of fuzzy logic-encompasses fuzzy logic as well as other methodologies such as neural networks, geneti... View full abstract»

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  • Navigation system of pilotless aircraft via GPS

    Publication Year: 1996, Page(s):16 - 20
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    The pilotless aircraft has wide applications in measuring earth, surveying mineral sources, fireproofing in the forest, observing floods and so on. In this paper, after briefly introducing positioning and navigation technologies for pilotless aircraft-a new kind of navigation system for pilotless aircraft using GPS (Global Positioning System) is presented. An overall plan of the navigation system ... View full abstract»

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  • The story behind Finnish telecommunications industry: military radio systems and electronic warfare in Finland during World War II (1939-1945)

    Publication Year: 1996, Page(s):3 - 7
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1248 KB)

    The growth of the Finnish telecommunications industry is not only based on the common Nordic need of talking to each other nor is it only dependent on the generally superior technical skills achieved through education but also has its tradition, which dates back to the years of WW II, when Finland was alone at the most critical moments of the nation's history and had to develop procedures and tech... View full abstract»

    Freely Available from IEEE
  • The time delay of a solar grazing photon

    Publication Year: 1996, Page(s):21 - 23
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    Moving clocks and clocks in a gravitational field slow down, not due to the effects of special relativity nor to the space-time curvature of general relativity, but due only to the principle of equivalence and the conservation of energy. However, some might argue that there has been a further “test” of the effect of gravity on time, namely, the measurement of the time-delay of a round-... View full abstract»

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  • Development of a driver board power supply for high power IGBTs used in three-phase inverters

    Publication Year: 1996, Page(s):24 - 28
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    High power IGBTs have been widely used for medium power inverters up to 200 kVA. Their driver circuits often require multiple-output, isolated power supplies. This paper presents a simple flyback power supply especially designed for the driver boards of three-phase IGBT inverters. The detailed circuit diagrams and typical waveforms are reported. Certain performance data are given. The power suppli... View full abstract»

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  • The Word Storage Relay (WSR)

    Publication Year: 1996, Page(s):29 - 33
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2088 KB)

    One of the more complex systems developed during the cold war was the BOMARC missile system developed by Boeing and the University of Michigan. The BO in the acronym stands for Boeing and the MARC Stands for Michigan Aeronautical Research Center. Boeing built two versions of the BOMARC, the first one designated “IM99A” and the second “IM99B”. The “A” version use... View full abstract»

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  • A hybrid amplifier as an RF building block

    Publication Year: 1996, Page(s):34 - 36
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A hybrid RF amplifier SMD-chip offers the benefit of a really simple bypass circuitry, ease of construction and minimal size. As an example, with the MiniCircuits VNA, a gain of about 15 dB can be achieved through the frequency band of 500 MHz to 3 GHz. Input matching can be near a VSWR of 1.9. At frequencies above 3 GHz however the input might provide a reflection coefficient greater than unity d... View full abstract»

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  • Batteries vs. alternatives for storing energy

    Publication Year: 1996
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Electric utilities need quickly-available sources of power for supplying expected and unexpected peak loads. Among useful sources have been the energy stored in water by pumping it to elevated storage reservoirs, in air compressed into underground chambers, and in batteries. A new power source, tBase-load nuclear and coal-fired steam plants generate off-peak energy for recharging the depleted stor... View full abstract»

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Aims & Scope

IEEE Aerospace and Electronic Systems Magazine is a monthly magazine that publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments as well as news and information of interest to IEEE Aerospace and Electronic Systems Society members.

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Meet Our Editors

Editor-in-Chief
Maria Sabrina Greco
Dept. of Information Engineering
University of Pisa
Via G.Caruso 16
56122 Pisa, Italy
Ph: +39 050 2217620
m.greco@ieee.org