Pedestrian Navigation in Obstructed Environments
Nov 1, 2007
By:
Franz Weimann, Günther Abwerzger, Bernhard Hofmann-Wellenhof
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Firefighters, rescue teams, and other special workers need hybrid navigation to perform safely and efficiently in GNSS signal-denied areas.
Integrated Nav with Software-Defined Radio
Nov 1, 2006
By:
Alison Brown, Janet Nordlie
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A networked radionavigation approach that augments GPS signals with time-of-arrival observations using a software-defined radio can overcome attenuation, and often complete blockage, of GPS inside buildings or in urban canyons. The SDR can operate both as a GPS receiver and also as a 900 MHz transceiver operating within the ISM band. Applications for this technology include firefighters and other first responders, and military operations in urban terrain.
The New York and Chicago fire departments are installing life-saving vehicle tracking systems built by Motorola with u-blox GPS, according to u-blox America of Herndon, Virginia.
Aug 1, 2006
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From the safety of workers to the protection of assets and the transportation of hazardous materials, GPS tracking has become an increasingly important safeguard against security threats. But users must be aware of the technology's vulnerabilities and of the tools needed to ensure protection.
GPS Dropsondes Trace Katrina's Course
Oct 1, 2005
By:
Marty Whitford
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GPS dropsondes released into the Katrina's eyewall tracked and predicted wind strength, speed, and direction.
Low Cost, High Trust for Mobile Units
Jul 1, 2005
By:
Philipp A. Boysen, Hugo Zunker
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Low-cost sensors and a Horizontal Trust Level (HTL) enable mobile-terminal applications requiring continuous quality of service in positioning and integrity.
Enhancing Location Security
Oct 1, 2004
By:
Chris Wullems, Oscar Pozzobon, Kurt Kubik
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A tamper-resistant receiver can quantify the trust of a location solution and provide cryptographic proof to a remote application.
