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Aerospace and Electronic Systems Magazine, IEEE

Issue 4 • Date April 2010

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Displaying Results 1 - 17 of 17
  • [Front cover]

    Publication Year: 2010 , Page(s): c1
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  • This month's covers …

    Publication Year: 2010 , Page(s): c2
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  • Table of contents

    Publication Year: 2010 , Page(s): 1
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  • In this issue - technically

    Publication Year: 2010 , Page(s): 2
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  • From the Editor-In-Chief

    Publication Year: 2010 , Page(s): 3
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  • Making a case for systems engineering

    Publication Year: 2010 , Page(s): 4 - 17
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2005 KB)  

    In late 2007, the Systems Engineering Advancement (SEA) Project at the Jet Propulsion Laboratory (JPL) decided to design a multi-day Systems Engineering Workshop to train systems engineers in the practice of systems engineering. They were determined to avoid the trap of merely giving hours of lectures and presentations that would bore audiences and soon be forgotten. They decided to base the workshop on six detailed ease studies, each approximately 15 pages in length. The topics of the six ease studies were selected to cover a range of types of flight projects - orbiters, landers and rovers, planetary and earth missions, development and operations, spacecraft and instruments, recent past and current. By including this range of projects, they hoped to touch on a broad spectrum of systems engineering situations, issues, and challenges, and to use these to accomplish specific learning objectives. They developed a template for the case studies to ensure that specific areas were addressed in each case study, and to ensure that a ?big picture? view of the mission itself would be presented before getting into the ?meat? of the case, Then questions were designed to ensure that the workshop participants would wrestle with the systems engineering challenges presented, and would understand and absorb the systems engineering skills needed to address them. The workshop also included sessions of ?story-telling? by key Project Systems Engineers and short lecture sessions addressing key topics and concepts. This describes the approach and methodology for designing detailed case studies for use as learning tools for systems engineering training. It describes the planning and development process and the approach for actually utilizing them in a real workshop. It concludes with lessons learned and the results from the recent JPL Systems Engineering Workshop. View full abstract»

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  • Blind methods for detecting image fakery

    Publication Year: 2010 , Page(s): 18 - 24
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    In today's digital age, it is possible to effortlessly create image forgeries without leaving any obvious traces of tampering. Herein, we present a brief review of existing blind methods for detecting image fakery. Blind methods are regarded as a new direction and work without using any prior information about the image being investigated or its source. View full abstract»

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  • Airborne Collision Avoidance System for low attitude flights using Radio Data System

    Publication Year: 2010 , Page(s): 25 - 29
    Cited by:  Papers (2)
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    Radio Data System (RDS) is a mature technique which has been developed over the past 20 years. Due to the common use of FM radio, the traits of low estate requirement and the convenience in broadcasting, RDS is suitable for use in wireless transmission of large-range and low-load data. This proposes the application of RDS in the Traffic Collision Avoidance System (TCAS) for low altitude flights. The real-time surveillance information from the airport control center of low attitude flights can be wirelessly transmitted in real-time to the RDS receiver in the aircrafts. Because of the low-price of RDS broadcast station and the widespread use of RDS receiver contributed by the application of RDS-TMC for car navigation system in recent years, using RDS as the redundancy communication system in low altitude flights is plausible in almost every aspect, Nevertheless, one thing left to be desired is the slow transferring speed (1187.5 bps) of RDS, which is amended in this research by particularly designed data formats to reduce the information load in each transmission. As a result, the application proposed herein is feasible. View full abstract»

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  • High altitude airborne cellular base stations antenna analysis

    Publication Year: 2010 , Page(s): 30 - 36
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3385 KB)  

    Obtaining continual mobile communication coverage over two or more disparate regions from an airborne platform utilizing a deployable cellular base station has proven to be challenging due to the resulting signal spatial structure and signal gain observed from the mobile ground users. A two-dimensional aircraft simulation environment has been developed to evaluate the optimal link budget of an antenna system coupled with a Code Division Multiple Access (CDMA) base station positioned above 45,000 feet in a designated elliptical orbital pattern in an effort to acquire broader and longer communication coverage. This will analyze the signal excess results of both an omni-directional conventional antenna system (CAS) and a switched-beam smart antenna system (SBSAS) with multiple mobile ground users present. Collectively, these results constitute a basis for low-risk implementation for a high altitude airborne deployable cellular base station. View full abstract»

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  • Turbo-Coded APSK for aeronautical telemetry

    Publication Year: 2010 , Page(s): 37 - 43
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2109 KB)  

    The performance of turbo-coded Amplitude-Phase Shift Keying (APSK) in an aeronautical telemetry system with a non-linear power amplifier is investigated. The AM/AM curves for four L-band power amplifiers are modeled and used to simulate the performance the turbo-coded APSK system over a non-linear channel, Spectral efficiency and bit error rate performance as a function of back-off are quantified and compared with a system based on the existing aeronautical telemetry standard using uncoded SOQPSK. The results show that the -50 dBc bandwidth can be matched with 2.5 to 4.1 dB of back-off, the -60dBc bandwidth can be matched with 4.3 to 6.6 dB of back-off, and the 99%. bandwidth can be matched with 0.8 to 1.6 dB of back-off. The bit error rate results show that each power amplifier has an optimal back-off and that this back-off is 3 dB for the four amplifiers used in this study. When put together, this system is capable of outperforming an uncoded system based on SOQPSK by matching (or exceeding) the detection efficiency while simultaneously achieving a spectral efficiency in excess of three times that of SOQPSK. View full abstract»

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  • Future contributions to appear in the IEEE Transactions on Aerospace and Electronic Systems [TAES]

    Publication Year: 2010 , Page(s): 44
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  • Distinguished lecturers & tutorials

    Publication Year: 2010 , Page(s): 45
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  • Directory of IEEE-AESS personnel

    Publication Year: 2010 , Page(s): 46
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  • IEEE Aerospace & Electronic Systems Society Organization

    Publication Year: 2010 , Page(s): 47
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  • Membership application

    Publication Year: 2010 , Page(s): 48
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  • Meetings calendar

    Publication Year: 2010 , Page(s): c3
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  • [Back cover]

    Publication Year: 2010 , Page(s): c4
    Cited by:  Papers (1)
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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.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Teresa Pace, PhD EE
Chief Engineer SenTech
SenTech, LLC - A DSCI Company
12601 Research Parkway
Orlando, FL 32826
(407) 207-1900 ext: 2102
(407) 450-0929 (BB)
tpace@sentech.dsci.com