TAG: London

GPS at the Olympics: Twitter Disrupts GPS Data from Olympic Cyclers to Broadcasters

July 31, 2012By

  UPDATE: Title changed to clarify that GPS signals are not affected, but the transfer of the GPS data to the broadcasters.   GPS is playing a role at the 2012 Olympics in London, through apps for smartphones to transportation issues, and even a clash with social media. Twitter Disrupts GPS Data from Olympic Cyclists to Broadcasters The International Olympic... read more

SSTL-OHB System Consortium to Build Eight More Galileo FOC Satellites

February 3, 2012By

European Commission Vice President Antonio Tajani announced in London that the consortium led by OHB System AG and Surrey Satellite Technology Ltd. (SSTL) will build a further eight satellites for the European Union’s Galileo satellite navigation program under the supervision of the European Space Agency. The new contract will see SSTL continuing its role as payload prime, assembling, integrating and... read more

This article is tagged with , and posted in Featured Stories, Galileo, GNSS, Latest News

Shadow Matching: Improved GNSS Accuracy in Urban Canyons

February 1, 2012By
Figure 8. Candidate user positions (in yellow) and true receiver positions (in red and green) in the shadow matching experimental verification.

GNSS positioning in dense urban areas is unreliable, with accuracy particularly poor in the cross-street direction. One solution is shadow matching, a new positioning technique that uses 3D building models to predict which satellites are visible from different locations and compares this with the measured satellite visibility to determine position. This article presents test results of a preliminary shadow-matching algorithm in a London urban canyon and discusses the practical implementation of the technique. read more

This article is tagged with , , , and posted in LBS/Wireless, Personal Navigation