Innovation

Innovation: It’s Not All Bad

October 1, 2009By
Mauna Kea GPS station MKEA, facing northwest

Understanding and Using GNSS Multipath
Telltale signs of multipath are the fluctuations in the signal-to-noise ratios (SNRs) reported by some GNSS receivers. In this month’s column, the authors look at how an analysis of SNR values can be used to map the multipath environment surrounding an antenna so that models of multipath can be constructed to further minimize its effect. Also, although an annoyance for most GNSS users, it turns out that multipath has its positive points. read more

This article is tagged with and posted in Algorithms & Methods, Innovation

Innovation: One Year in Orbit

September 1, 2009By
DSCN2663_2

GIOVE-B E1 CBOC Signal Quality Assessment
GIOVE-B has been in orbit for just over one year. How well is it performing? In particular, what can we say about one of GIOVE-B's pioneering features: its E1 CBOC signal? In this month's column, we take a detailed look at a particular monitoring and assessment program set up to examine the GIOVE-B signals and discuss some of its initial CBOC results. The successful operation of this program bodes well for its use in future validation campaigns. read more

Innovation: Where Is GIOVE-A Exactly?

July 1, 2009By
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Using Microwaves and Laser Ranging for Precise Orbit Determination
Though Galileo’s GIOVE-A is a test satellite not necessarily ready for scientific use, orbit analyses with a reduced accuracy can help to identify weaknesses and suggest improvements. This month, the authors share work being carried out to precisely determine the orbit of GIOVE-A using SLR and microwave observations. This preliminary investigation will benefit the procedures to be implemented for the future Galileo constellation. read more

This article is tagged with and posted in GNSS, Innovation

Innovation: GPS L5 First Light

June 1, 2009By
Fig2(left)

A Preliminary Analysis of SVN49’s Demonstration Signal
Great excitement surrounds the activation of a new transmitter from a satellite — an occasion dubbed first light. Research groups around the globe joined the GPS Wing in monitoring and analyzing the first L5 signals from space. We describe the equipment and procedures used to capture and analyze SVN49's signals and give an assessment of their characteristics. read more

This article is tagged with and posted in GPS Modernization, Innovation

Innovation: The International GNSS Service: Any Questions? (PDF)

January 1, 2007By

Innovation: The International GNSS Service: Any Questions? (PDF) By Angelyn W. Moore Published: January 2007 GPS World In this month’s column, Angelyn Moore, the IGS Central Bureau’s deputy director, overviews the organization’s service, history, and future, demonstrating that the IGS is a model of scientific collaboration of which not just the GNSS community but the whole world should be proud.—Richard... read more

This article is tagged with and posted in GNSS, Innovation

Innovation: GNSS Radio (PDF)

May 1, 2006By

Innovation: GNSS Radio: A System Analysis and Algorithm Development Research Tool for PCs (PDF) By J.K. Ray, S.M. Deshpande, R.A. Nayak, and M.E. Cannon Published: May 2006 GPS World In this month’s column, a team of researchers from India and Canada describe a GNSS radio and how they have used it to develop and test algorithms for processing both legacy... read more

This article is tagged with and posted in Algorithms & Methods, Innovation, Receiver Design

Innovation: Satellite Navigation Evolution: The Software GNSS Receiver (PDF)

January 1, 2005By

Innovation: Satellite Navigation Evolution: The Software GNSS Receiver (PDF) By Glenn MacGougan, Peter Ludvig Normark, and Christian Stahlberg Published: January 2005 GPS World In this month’s Innovation, we look at a further evolution of the GNSS receiver which offers the promise of flexibility, adaptability, and cost-effectiveness.—Richard Langley read more

This article is tagged with and posted in GNSS, Innovation, Receiver Design

Innovation: Assisted GPS: A Low-Infrastructure Approach (PDF)

March 1, 2002By

Innovation: Assisted GPS: A Low-Infrastructure Approach (PDF) By Jimmy LaMance, Javier DeSalas, and Jani Järvinen Published: March 2002 GPS World Have you ever tried to use a GPS receiver indoors? Chances are, unless you were on the top floor of a wood-frame house and using a receiver with ample antenna gain, you couldn’t get a position fix. GPS is a... read more

This article is tagged with and posted in Indoor Positioning, Innovation, LBS/Wireless