Global Navigation Satellite Systems Engineering, Policy, and Design
Danny Kim, iSuppli[Reprinted with permission from NAVIBIZ, Issue Date: 2010-3-26]
By Inside GNSS
Farshid Alizadeh-Shabdiz is the chief scientist at Skyhook Wireless Inc. responsible for the research and development of Skyhook’s positioning technology.
He has more than 17 years of industrial experience in the design and implementation of satellite and wireless networks.
Before joining Skyhook Wireless, he was the head of the communications section of Advanced Solutions Group (part of Cross Country Automotive Services). Earlier, he worked at Hughes Network Systems.
By Inside GNSS
Wireless local area networks (WLANs), popularly known as Wi-Fi, were originally designed for data applications. Over the past decade or so, WLAN infrastructure has been implemented for high-speed wireless Internet access in homes, “hot-spots,” university campuses, and corporate buildings. Hundreds of millions of Wi-Fi access points (APs) are deployed in major urban areas worldwide.
By
GPS, Glonass, Galileo Receiver Testing Using a GNSS Signal Simulator
This application note explains how to perform automated receiver tests using the R&S SMBV100A. The presented tests include TTFF, sensitivity and location accuracy measurements, moving receiver and interference tests, and many more. Basic remote control examples are provided for the individual tests to ease programming.
By Inside GNSS
Want to win $40k? DARPA gives you one day to locate 10 of these 8-foot weather balloons moored across the USA(Updated December 7, 2009) A Massachusetts Institute of Technology team won the DARPA Network Challenge on Saturday, December 5. They took home a $40,000 cash prize from the Defense Advanced Research Projects Agency.
The team successfully located 10 eight-foot diameter, bright red weather balloons moored in plain site at locations across the United States.
Apparently, the DARPA personnel in charge were sensitive to frigid winter weather in the heartland – most of the balloons turned out to be moored in pleasant places for an outdoor December search: Portland, Oregon; San Francisco and Santa Barbara, California; Scottsdale, Arizona; Katy, Texas; Memphis, Tennessee; Atlanta, Georgia; Miami, Florida; Charlottesville, Virginia; and Christiana, Delaware.
By Inside GNSS
Trimble will hold its first user conference in China on December 15-17 at the Jiuhua Resort and Conference Center in Beijing. It will cover civilian technology only.
The theme "Exploration Has No Boundaries," draws comparisons between 15th century navigator Zhenghe, the 2008 space mission Shenqui, and the use of positioning technology to steer exploration.
Trimble head Steve Bergland will deliver one of the conference keynotes.
By Inside GNSS
Q: Ever wonder why it is SO difficult to launch your spaceborne GNSS receiver?
A: I often wonder if most people, both inside and outside the aerospace community, really understand all the challenges that must be overcome prior to launching a spaceborne GNSS receiver.
By
Since the dawn of humanity, the sky and stars have stimulated our imagination and curiosity. As our understanding about outer space increases, so does our passion and drive to explore beyond the reaches of our own planet — and to use space to understand our own planet.
By
Thalwil, Switzerland–based embedded GNSS receiver provider u-blox has announced the upgrade of its core CMOS technology to u-blox 6, with substantially reduced power requirements as the result of new "intelligent," user-selectable power management features. According to the company, these innovations enable significantly extended battery life for power-critical GPS applications.
By Inside GNSS
When the GPS program was established, military services were undoubtedly targeted as its primary user group, focusing on outdoor operations and offering the capability of continuous tracking. In addition we have heard several times that GPS was planned as a dual-use system from its very beginning.
By Günter W. Hein
CSR plc and SiRF Technology Holdings Inc., have completed the merger between SiRF and a wholly owned subsidiary of CSR.
By Inside GNSS
Time Series and Power Spectrum of the L5 Demonstration SignalThe GPS IIR-20(M) satellite successfully transmitted for the first time a GPS signal in the L5 frequency band today (April 10), according to the U.S. Air Force operators of the Global Positioning System. L5, the third civil GPS signal, will eventually support safety-of-life applications for aviation and provide improved availability and accuracy to users.
By Inside GNSS
Transportation Secretary Ray LaHoodOne change that apparently won’t happen under the Obama administration is replacing the federal gasoline tax with a GPS-monitored mileage fee.
In an interview with the Associated Press last week, U.S. Department of Transportation (DoT) Secretary Ray LaHood had suggested that his agency should look at a “vehicular miles program where people are actually clocked on the number of miles that they traveled.”
It was one of the shortest flights of a trial balloon so far this year.
By Glen Gibbons
