NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
NASA Scientific and Technical Aerospace Reports
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Patent Info.: Filed 30 Aug. 2002; US-Patent-6,763,083; US-Patent-Appl-SN-232937; <strong>NASA</strong>-Case-MFS-31783-1; No<br />
Copyright; Avail: CASI; A02, Hardcopy<br />
During the last ten years patents directed to luggage scanning apparatus began to appear in the patent art. Absent from<br />
the variety of approaches in the art is stereoscopic imaging that entails exposing two or more images of the same object, each<br />
taken from a slightly different perspective. If the perspectives are too different, that is. if there is too much separation of the<br />
X-ray exposures, the image will look flat. Yet with a slight separation, a stereo separation, interference occurs. Herein a system<br />
is provided for the production of stereo pairs. One perspective, a left or a right perspective angle, is first established. Next,<br />
the other perspective angle is computed. Using these left <strong>and</strong> right perspectives the X-ray sources can then be spaced away<br />
from each other.<br />
Author<br />
Baggage; Imaging Techniques; Stereoscopy; X Ray Imagery<br />
04<br />
AIRCRAFT COMMUNICATIONS AND NAVIGATION<br />
Includes all modes of communication with <strong>and</strong> between aircraft; air navigation systems (satellite <strong>and</strong> ground based); <strong>and</strong> air traffic<br />
control. For related information see also 06 Avionics <strong>and</strong> Aircraft Instrumentation, 17 Space Communications, Spacecraft<br />
Communications, Comm<strong>and</strong> <strong>and</strong> Tracking, <strong>and</strong> 32 Communications <strong>and</strong> Radar.<br />
20040112000 <strong>NASA</strong> Langley Research Center, Hampton, VA, USA<br />
Fuzzification of Electromagnetic Interference Patterns Onboard Commercial Airliners Due to Wireless Technology<br />
Jafri, Madiha; Ely, Jay; Vahala, Linda; [2003]; 4 pp.; In English; Original contains color illustrations; No Copyright; Avail:<br />
CASI; A01, Hardcopy<br />
The use of portable wireless technology has increased dramatically over the past few years. Over the years however,<br />
numerous reports have cited portable electronic devices (PEDs) as a possible cause of electromagnetic interference (EMI) to<br />
aircraft navigation <strong>and</strong> communication radio systems. PEDs may act as transmitters <strong>and</strong> their signals may be detected by the<br />
various radio receiver antennas installed on the aircraft. Measurement of the radiated field coupling between passenger cabin<br />
locations <strong>and</strong> aircraft communication <strong>and</strong> navigation receivers, via their antennas is defined herein as interference path loss<br />
(IPL). Personnel from <strong>NASA</strong> Langley Research Center, Eagles Wings Inc., <strong>and</strong> United Airlines performed extensive IPL<br />
measurements on several Boeing 737 airplanes. In previous work, the IPL data collected was graphically plotted <strong>and</strong> presented<br />
using MATLAB. This paper provides an introductory result of modeling EMI patterns using Fuzzy Logic, using the graphical<br />
analysis of the IPL data summarized. The application of fuzzy logic seeks to provide a means of estimating IPL at various<br />
locations within an airplane passenger cabin using simple modeling parameters. Fuzzy logic methods may provide a means<br />
to assess IPL characteristics of aircraft that have not been subject to expensive measurement or modeling processes <strong>and</strong> may<br />
also be useful for estimating the merit of aircraft design changes intended to minimize the potential for EMI.<br />
Author<br />
Commercial Aircraft; Electromagnetic Interference; Fuzzy Systems; Wireless Communication; Technology Utilization<br />
20040112042 <strong>NASA</strong> Glenn Research Center, Clevel<strong>and</strong>, OH, USA<br />
Mobile Router Testing with Diverse RF Communications Links<br />
Brooks, David; Hoder, Doug; Wilkins, Ryan; [2004]; 16 pp.; In English; <strong>NASA</strong> ICNS Conference <strong>and</strong> Workshop, 26-30 Apr.<br />
2004, Fairfax, VA, USA<br />
Contract(s)/Grant(s): WBS 22-727-01-04; No Copyright; Avail: CASI; A03, Hardcopy<br />
This is a short report on demonstrations using Mobile IP <strong>and</strong> several diverse physical communications links to connect<br />
a mobile network to a fixed IPv4 internet. The first section is a description of the equipment used, followed by descriptions<br />
of the tests, the theoretical results, <strong>and</strong> finally conclusions <strong>and</strong> the actual data.<br />
Author<br />
Communication Networks; Internets; Radio Communication; Ground-Air-Ground Communication; Aircraft Communication<br />
20040112052 <strong>NASA</strong> Glenn Research Center, Clevel<strong>and</strong>, OH, USA<br />
Aviation Communications Emulation Testbed<br />
Sheehe, Charles; Mulkerin, Tom; April 26, 2004; 10 pp.; In English; 4th Integrated CNS Technologies Conference <strong>and</strong><br />
Workshop, 26-30 Apr. 2004, Fairfax, VA, USA<br />
Contract(s)/Grant(s): 22-727-01-04; No Copyright; Avail: CASI; A02, Hardcopy<br />
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