IEEE Aerospace and Electronic Systems Magazine

Volume 4 Issue 4 • April 1989

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  • Magnetic braking of the Earth's rotation

    Publication Year: 1989, Page(s):3 - 10
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (586 KB)

    The Earth's rotation is decelerating at a rate of 8.8*10 exp-20 rad/s. Thus, a leap second is added to the year every two to four years. This deceleration is small, but the Earth weighs 6*10 exp 24 kg. A prony brake that achieves this deceleration would release 5.14*10 exp 11 kW, the equivalent of 514,000 1-GW nuclear power plants. Tides, volcanos, Coriolis-generated ocean currents and winds canno... View full abstract»

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  • Predicting ionospheric scintillation for satellite communications

    Publication Year: 1989, Page(s):11 - 13
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (241 KB)

    An ionospheric scintillation prediction model and display were developed for the Command Post Modem/Processor (CPM/P) for demonstration purposes. The CPM/P equations were then incorporated in a Lotus 1-2-3 spreadsheet to allow predictions to be made using a desktop computer instead of the CPM/P equipment. Using this information, the operator can improve the message throughput of a UHF satellite co... View full abstract»

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  • RT&E for the next generation weather radar (NEXRAD) system

    Publication Year: 1989, Page(s):14 - 18
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (339 KB)

    The author describes how the military standard on reliability testing (MIL-STD-781C) has been used as a basis for planning the reliability test and evaluation program for a current electronic system development, the next generation weather radar (NEXRAD) system. A short description is given of the NEXRAD system configuration and of the availability requirements and calculations for the system. Gen... 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