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Aerospace and Electronic Systems Magazine, IEEE

Issue 1 • Date Jan. 1999

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Displaying Results 1 - 7 of 7
  • International Radar Symposium 1998

    Publication Year: 1999 , Page(s): 3 - 6
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    Freely Available from IEEE
  • Radar signals analysis and modellization in the presence of JEM application to civilian ATC radars

    Publication Year: 1999 , Page(s): 35 - 40
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (452 KB)  

    This paper describes the application of a simulation software and the comparison of its results with actual data recorded from operating ATC radars in S and L bands. Results obtained in an application on actual signals (relative to commercial aircraft echoes) collected from observations on the echo received at an ATC radar system are presented. These signals were recorded along many field experiments carried out by the authors on a recording system specifically developed for this purpose. Due to the constitutive and operative characteristics of the systems, the results are affected by a low spectral resolution and a strong aliasing which give rise to problems in a correct analysis. The observed results have been related to the physical phenomena generated by the structure of the complex target we suppose to be made of a rigid body and rotating parts which originate such a modulation on the echo signal that it is known in related literature as Jet Engine Modulation (JEM). These phenomena may be regarded as a signature of the particular couple “engine-aircraft body” and in some flight conditions may offer significant help to a correct characterization of the aircrafts View full abstract»

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  • Combined heat and power: how much carbon and energy can manufacturers save?

    Publication Year: 1999 , Page(s): 7 - 12
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (736 KB)  

    In this paper we analyze the potential for CHP in US manufacturing. We use typical efficiencies of today's available CHP technologies to estimate the technical potential for the frozen technology case. We find that if manufacturers in 1994 had self-generated all their steam and electric needs with existing cost-effective CHP technologies, they could have reduced carbon equivalent (=12/44 carbon dioxide) emissions by up to 30 million metric tons of carbon (MtC) or nearly 20 percent, and energy use by nearly an Exajoule (EJ). With growth in manufacturing and expected improvements in CHP technologies, this technical potential could be much larger. However, without environmental regulatory reform and innovation-oriented utility restructuring policies, actual CHP installed by US manufacturers could fall far short View full abstract»

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  • Open systems architecture for integrated RF electronics

    Publication Year: 1999 , Page(s): 29 - 33
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (596 KB)  

    The Integrated Sensor System (ISS) program is defining an Open System Architecture (OSA) for Radio Frequency (RF) electronics, which represent the largest portion of an advanced aircraft's avionics flyaway cost. An integrated architecture is used to reduce costs in a number of ways, including time-sharing, centralization of resources, and reduction of the number of unique module types. The OSA approach extends these cost reductions by simplifying technology insertion, using well-understood standards, and increasing use of commercial hardware and software. This paper describes interim results. The work was funded by the Open Systems Joint Task Force (OS-JTF) View full abstract»

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  • Multifunctional structures technology experiment on Deep Space 1 Mission

    Publication Year: 1999 , Page(s): 13 - 18
    Cited by:  Papers (1)
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    Lockheed Martin Astronautics has developed the Multifunctional Structure (MFS) concept as a new system for spacecraft design that eliminates chassis, cables, connectors and folds the electronics into the walls of the spacecraft. Concurrent engineering will be essential to integrate the electronic, structure, and thermal design. Design methodologies are in work to manage all power, grounding and shielding concerns. The MFS approach offers significant savings in mass and volume and supports the “faster-better-cheaper” philosophy in new spacecraft programs. The technology will be demonstrated as an experiment on the New Millenium Program Deep Space 1 (DS 1) mission View full abstract»

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  • Controlled Flight Into Terrain and the enhanced Ground Proximity Warning system

    Publication Year: 1999 , Page(s): 19 - 24
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (520 KB)  

    The leading cause of worldwide aviation fatalities comes from inadvertently flying a perfectly operating aircraft into the ground or water. This type of accident is referred to as Controlled Flight Into Terrain (CFIT). Statistics show that introduction of the Ground Proximity Warning System (GPWS) into the scheduled air carrier turbojet fleet has been accompanied by a dramatic drop in the frequency of CFIT accidents. Training aids, videos, checklists, and procedural recommendations have also been produced to aid in CFIT risk reduction. Despite these actions, CFIT worldwide losses continue. Common characteristics of these continued accidents are a lack of installed GPWS or shortcomings of the current GPWS detection algorithms. The Enhanced Ground Proximity Warning Systems have been developed to address these shortcomings, and to provide enhanced situational awareness to the pilots such that CFIT accidents can become a thing of the past View full abstract»

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  • Dynamic tests with a switched reluctance motor drive

    Publication Year: 1999 , Page(s): 25 - 28
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (660 KB)  

    Starting and reversing times of less than 40 ms, torque ripple below ten percent and operational speeds over 5000 1/min. (rpm) can be achieved with our 6/4 prototype switched reluctance motor drive. The drive efficiency approaches 80 percent but it is currently limited by high switching frequency. Peak currents of 50 A are needed in the 4.2 kW machine. Experimental results of the prototype switched reluctance machine are shown View full abstract»

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Aims & Scope

The IEEE Aerospace and Electronic Systems Magazine publishes articles and tutorials concerned with the various aspects of systems for space, air, ocean, or ground environments.

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Meet Our Editors

Editor-in-Chief
Teresa Pace, PhD EE
Chief Engineer SenTech
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