Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781720663669
Category :
Languages : en
Pages : 94
Book Description
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
Portable Integrated Wireless Device Threat Assessment to Aircraft Radio Systems
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781720663669
Category :
Languages : en
Pages : 94
Book Description
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
Publisher: Createspace Independent Publishing Platform
ISBN: 9781720663669
Category :
Languages : en
Pages : 94
Book Description
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
Portable Wireless LAN Device and Two-way Radio Threat Assessment for Aircraft Navigation Radios
Author:
Publisher:
ISBN:
Category : Local area networks (Computer networks)
Languages : en
Pages : 236
Book Description
Publisher:
ISBN:
Category : Local area networks (Computer networks)
Languages : en
Pages : 236
Book Description
Wireless Phone Threat Assessment and New Wireless Technology Concerns for Aircraft Navigation Radios
Author: Jay J. Ely
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 200
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 200
Book Description
Portable Wireless Lan Device and Two-Way Radio Threat Assessment for Aircraft Vhf Communication Radio Band
Author: Truong X. Nguyen
Publisher: BiblioGov
ISBN: 9781289148102
Category :
Languages : en
Pages : 96
Book Description
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.
Publisher: BiblioGov
ISBN: 9781289148102
Category :
Languages : en
Pages : 96
Book Description
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.
Third Generation Wireless Phone Threat Assessment for Aircraft Communication and Navigation Radios
Author: Truong X. Nguyen
Publisher: BiblioGov
ISBN: 9781289267803
Category :
Languages : en
Pages : 218
Book Description
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.
Publisher: BiblioGov
ISBN: 9781289267803
Category :
Languages : en
Pages : 218
Book Description
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.
Department of Transportation and Related Agencies Appropriations for 2003: 2003 budget justifications
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1814
Book Description
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1814
Book Description
Department of Transportation and Related Agencies Appropriations for 2003
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 2866
Book Description
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 2866
Book Description
Department of Transportation and Related Agencies Appropriations for 2003
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Dept. of Transportation and Related Agencies Appropriations
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 2004
Book Description
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 2004
Book Description
Symposium Record
Author:
Publisher:
ISBN:
Category : Electromagnetic compatibility
Languages : en
Pages : 338
Book Description
Publisher:
ISBN:
Category : Electromagnetic compatibility
Languages : en
Pages : 338
Book Description
Air Traffic Management for Commercial and Military Systems
Author:
Publisher:
ISBN:
Category : Air traffic control
Languages : en
Pages : 1042
Book Description
Publisher:
ISBN:
Category : Air traffic control
Languages : en
Pages : 1042
Book Description