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Author :
Publisher :
ISBN 13 :
Total Pages : 236 pages
Book Rating : 4.:/5 (317 download)
Download or read book Portable Wireless LAN Device and Two-way Radio Threat Assessment for Aircraft Navigation Radios written by and published by . This book was released on 2003 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781720663669
Total Pages : 94 pages
Book Rating : 4.6/5 (636 download)
Download or read book Portable Integrated Wireless Device Threat Assessment to Aircraft Radio Systems written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: An assessment was conducted on multiple wireless local area network (WLAN) devices using the three wireless standards for spurious radiated emissions to determine their threat to aircraft radio navigation systems. The measurement process, data and analysis are provided for devices tested using IEEE 802.11a, IEEE 802.11b, and Bluetooth as well as data from portable laptops/tablet PCs and PDAs (grouping known as PEDs). A comparison was made between wireless LAN devices and portable electronic devices. Spurious radiated emissions were investigated in the radio frequency bands for the following aircraft systems: Instrument Landing System Localizer and Glideslope, Very High Frequency (VHF) Communication, VHF Omnidirectional Range, Traffic Collision Avoidance System, Air Traffic Control Radar Beacon System, Microwave Landing System and Global Positioning System. Since several of the contiguous navigation systems were grouped under one encompassing measurement frequency band, there were five measurement frequency bands where spurious radiated emissions data were collected for the PEDs and WLAN devices. The report also provides a comparison between emissions data and regulatory emission limit.Salud, Maria Theresa P. and Williams, Reuben A. (Technical Monitor)Langley Research CenterELECTRONIC EQUIPMENT; RADIO FREQUENCY INTERFERENCE; AIRCRAFT COMMUNICATION; WIRELESS COMMUNICATION; PORTABLE EQUIPMENT; COMMUNICATION EQUIPMENT; LOCAL AREA NETWORKS; VERY HIGH FREQUENCY RADIO EQUIPMENT; INSTRUMENT LANDING SYSTEMS; MICROWAVE LANDING SYSTEMS; COLLISION AVOIDANCE; GLOBAL POSITIONING SYSTEM; RADAR BEACONS
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781720663874
Total Pages : 94 pages
Book Rating : 4.6/5 (638 download)
Download or read book Portable Wireless LAN Device and Two-Way Radio Threat Assessment for Aircraft VHF Communication Radio Band written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document summarizes the safety analysis performed on a Flight Guidance System (FGS) requirements model. In particular, the safety properties desired of the FGS model are identified and the presence of the safety properties in the model is formally verified. Chapter 1 provides an introduction to the entire project, while Chapter 2 gives a brief overview of the problem domain, the nature of accidents, model based development, and the four-variable model. Chapter 3 outlines the approach. Chapter 4 presents the results of the traditional safety analysis techniques and illustrates how the hazardous conditions associated with the system trace into specific safety properties. Chapter 5 presents the results of the formal methods analysis technique model checking that was used to verify the presence of the safety properties in the requirements model. Finally, Chapter 6 summarizes the main conclusions of the study, first and foremost that model checking is a very effective verification technique to use on discrete models with reasonable state spaces. Additional supporting details are provided in the appendices.Nguyen, Truong X. and Koppen, Sandra V. and Ely, Jay J. and Williams, Reuben A. and Smith, Laura J. and Salud, Maria Theresa P.Langley Research CenterLOCAL AREA NETWORKS; VERY HIGH FREQUENCIES; WIRELESS COMMUNICATION; PORTABLE EQUIPMENT; RADIO COMMUNICATION; AVIONICS; AIRCRAFT COMMUNICATION; THREAT EVALUATION; REVERBERATION CHAMBERS; FREQUENCIES; COLLISION AVOIDANCE; SAFETY; ELECTROMAGNETIC INTERFERENCE; DATA REDUCTION
Author : Truong X. Nguyen
Publisher : BiblioGov
ISBN 13 : 9781289148102
Total Pages : 96 pages
Book Rating : 4.1/5 (481 download)
Download or read book Portable Wireless Lan Device and Two-Way Radio Threat Assessment for Aircraft Vhf Communication Radio Band written by Truong X. Nguyen and published by BiblioGov. This book was released on 2013-06 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document summarizes the safety analysis performed on a Flight Guidance System (FGS) requirements model. In particular, the safety properties desired of the FGS model are identified and the presence of the safety properties in the model is formally verified. Chapter 1 provides an introduction to the entire project, while Chapter 2 gives a brief overview of the problem domain, the nature of accidents, model based development, and the four-variable model. Chapter 3 outlines the approach. Chapter 4 presents the results of the traditional safety analysis techniques and illustrates how the hazardous conditions associated with the system trace into specific safety properties. Chapter 5 presents the results of the formal methods analysis technique model checking that was used to verify the presence of the safety properties in the requirements model. Finally, Chapter 6 summarizes the main conclusions of the study, first and foremost that model checking is a very effective verification technique to use on discrete models with reasonable state spaces. Additional supporting details are provided in the appendices.
Author : Jay J. Ely
Publisher :
ISBN 13 :
Total Pages : 200 pages
Book Rating : 4.:/5 (317 download)
Download or read book Wireless Phone Threat Assessment and New Wireless Technology Concerns for Aircraft Navigation Radios written by Jay J. Ely and published by . This book was released on 2003 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jay J. Ely
Publisher : BiblioGov
ISBN 13 : 9781289276584
Total Pages : 202 pages
Book Rating : 4.2/5 (765 download)
Download or read book Wireless Phone Threat Assessment and New Wireless Technology Concerns for Aircraft Navigation Radios written by Jay J. Ely and published by BiblioGov. This book was released on 2013-08 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: To address the concern for cellular phone electromagnetic interference to aircraft radios, a radiated emission measurement process was developed for two dominant digital standards of wireless handsets. Spurious radiated emissions were efficiently characterized from devices tested in either a semi-anechoic or reverberation chamber, in terms of effective radiated power. Eight representative handsets (four from each digital standard) were commanded to operate while varying their radio transmitter parameters (power, modulation, etc.). This report provides a detailed description of the measurement process and resulting data, which may subsequently be used by others as a basis of consistent evaluation of other portable transmitters using a variety of wireless transmission protocols. Aircraft interference path loss and navigation radio interference threshold data from numerous reference documents, standards, and NASA partnerships were compiled. Using these data, a preliminary risk assessment is provided for wireless phone interference to aircraft Localizer, Glideslope, Very High Frequency Omni directional Range, and Global Positioning Satellite radio receivers on typical transport airplanes. The report identifies where existing data for device emissions, interference path loss, and navigation radio interference thresholds need to be extended for an accurate risk assessment for wireless transmitters in aircraft.
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721133260
Total Pages : 198 pages
Book Rating : 4.1/5 (332 download)
Download or read book Wireless Phone Threat Assessment and New Wireless Technology Concerns for Aircraft Navigation Radios written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: To address the concern for cellular phone electromagnetic interference to aircraft radios, a radiated emission measurement process was developed for two dominant digital standards of wireless handsets. Spurious radiated emissions were efficiently characterized from devices tested in either a semi-anechoic or reverberation chamber, in terms of effective radiated power. Eight representative handsets (four from each digital standard) were commanded to operate while varying their radio transmitter parameters (power, modulation, etc.). This report provides a detailed description of the measurement process and resulting data, which may subsequently be used by others as a basis of consistent evaluation of other portable transmitters using a variety of wireless transmission protocols. Aircraft interference path loss and navigation radio interference threshold data from numerous reference documents, standards, and NASA partnerships were compiled. Using these data, a preliminary risk assessment is provided for wireless phone interference to aircraft Localizer, Glideslope, Very High Frequency Omni directional Range, and Global Positioning Satellite radio receivers on typical transport airplanes. The report identifies where existing data for device emissions, interference path loss, and navigation radio interference thresholds need to be extended for an accurate risk assessment for wireless transmitters in aircraft. Ely, Jay J. and Nguyen, Truong X. and Koppen, Sandra V. and Beggs, John H. and Salud, Maria Theresa P. Langley Research Center DFTA03-96-X-90001; WU 728-30-10-01
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ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.3/5 (91 download)
Download or read book Symposium Record written by and published by . This book was released on 2004 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721944514
Total Pages : 214 pages
Book Rating : 4.9/5 (445 download)
Download or read book Third Generation Wireless Phone Threat Assessment for Aircraft Communication and Navigation Radios written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-27 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiated emissions in aircraft communication and navigation bands are measured from third generation (3G) wireless mobile phones. The two wireless technologies considered are the latest available to general consumers in the US. The measurements are conducted using reverberation chambers. The results are compared against baseline emissions from laptop computers and personal digital assistant devices that are currently allowed to operate on aircraft. Using existing interference path loss data and receivers interference threshold, a risk assessment is performed for several aircraft communication and navigation radio systems. In addition, cumulative interference effects of multiple similar devices are conservatively estimated or bounded. The effects are computed by summing the interference power from individual devices that is scaled according to the interference path loss at its location. Nguyen, Truong X. and Koppen, Sandra V. and Smith, Laura J. and Williams, Reuben A. and Salud, Maria Theresa P. Langley Research Center DTFA03-96-X-90001; 23R-772-96
Author : Truong X. Nguyen
Publisher : BiblioGov
ISBN 13 : 9781289267803
Total Pages : 218 pages
Book Rating : 4.2/5 (678 download)
Download or read book Third Generation Wireless Phone Threat Assessment for Aircraft Communication and Navigation Radios written by Truong X. Nguyen and published by BiblioGov. This book was released on 2013-07 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiated emissions in aircraft communication and navigation bands are measured from third generation (3G) wireless mobile phones. The two wireless technologies considered are the latest available to general consumers in the US. The measurements are conducted using reverberation chambers. The results are compared against baseline emissions from laptop computers and personal digital assistant devices that are currently allowed to operate on aircraft. Using existing interference path loss data and receivers interference threshold, a risk assessment is performed for several aircraft communication and navigation radio systems. In addition, cumulative interference effects of multiple similar devices are conservatively estimated or bounded. The effects are computed by summing the interference power from individual devices that is scaled according to the interference path loss at its location.
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ISBN 13 :
Total Pages : 988 pages
Book Rating : 4.0/5 ( download)
Download or read book 23rd DASC written by and published by . This book was released on 2004 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 842 pages
Book Rating : 4.3/5 (91 download)
Download or read book Proceedings written by and published by . This book was released on 2005 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Total Pages : 864 pages
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Download or read book 22nd DASC written by and published by . This book was released on 2003 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James Powell
Publisher : Pitman Publishing
ISBN 13 :
Total Pages : 272 pages
Book Rating : 4.3/5 (91 download)
Download or read book Aircraft Radio Systems written by James Powell and published by Pitman Publishing. This book was released on 1981 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alessandro De Gloria
Publisher : Springer
ISBN 13 : 3319550713
Total Pages : 232 pages
Book Rating : 4.3/5 (195 download)
Download or read book Applications in Electronics Pervading Industry, Environment and Society written by Alessandro De Gloria and published by Springer. This book was released on 2017-06-01 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a thorough overview of cutting-edge research on electronics applications relevant to industry, the environment, and society at large. It covers a broad spectrum of application domains, from automotive to space and from health to security, while devoting special attention to the use of embedded devices and sensors for imaging, communication and control. The book is based on the 2016 ApplePies Conference, held in Rome, Italy in September 2016, which brought together researchers and stakeholders to consider the most significant current trends in the field of applied electronics and to debate visions for the future. Areas addressed by the conference included information communication technology; biotechnology and biomedical imaging; space; secure, clean and efficient energy; the environment; and smart, green and integrated transport. As electronics technology continues to develop apace, constantly meeting previously unthinkable targets, further attention needs to be directed toward the electronics applications and the development of systems that facilitate human activities. This book, written by industrial and academic professionals, represents a valuable contribution in this endeavor.
Download or read book Popular Science written by and published by . This book was released on 2004-09 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.
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ISBN 13 :
Total Pages : 1088 pages
Book Rating : 4.:/5 (334 download)
Download or read book Commerce Business Daily written by and published by . This book was released on 2001-07 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt:
