Expert Advice & Leadership Talks

Directions 2014: Great Expectations

December 1, 2013By
Peter Large

By Peter O. Large, Vice President, Trimble November 29, 2013, marks the 210th anniversary of the birth of Christian Doppler. His work laid down the fundamental concepts that enabled researchers at Johns Hopkins University in the United States to make observations on the signals of Sputnik I during the International Geophysical Year of 1957. From those observations more than 60... read more

Directions 2014: Galileo IOV Passes with Flying Colors

December 1, 2013By

Following the second Galileo launch in October 2012, leading to four operational satellites in orbit, a progressive chain of events has taken place in 2013 encompassing all Galileo Services, starting from the first position fix on March 12 (Figure 1), when navigation message continuous broadcast began. read more

Directions 2014: Serve the World, Benefit Mankind — A System Matures

December 1, 2013By
Distribution of visible in-orbit BeiDou satellites.

By adhering to the principles of independence, openness, compatibility, and gradualness, China has steadily pushed forward the deployment of the BeiDou Navigation Satellite System (BDS), following a planned three-step strategy. In 2000, BeiDou Navigation Satellite Demonstration System was completed. By December 2012, five geostationary orbit (GEO) satellites, five inclined geosynchronous orbit (IGSO) satellites, and four medium-Earth orbit (MEO) satellites had been launched, forming the constellation, and formally beginning service provision to the Asia-Pacific region. read more

Directions 2014: New Horizons of GLONASS

December 1, 2013By

The fundamentals of Russian government policy in satellite navigation are defined in Presidential Decree #638 of May 17, 2007, and specify that GLONASS services are provided globally and free of any user fees, and GLONASS is used as a basis of the National Positioning, Navigation and Timing System. To efficiently implement the government policy in satellite navigation, in March 2012 the Government approved the dedicated Federal Program focused on GLONASS sustainment, development, and expansion of applications. read more

Expert Advice: Laser Reflectors to Ride on Board GPS III

September 1, 2013By
Figure 2. Structure and products of the Global Geodetic Observing System related to GPS performance.

By James J. Miller and John LaBrecque, NASA Headquarters, and A.J. Oria, Overlook Systems Technologies, Inc. Satellite laser ranging (SLR) and the results of combining SLR with GPS in the future will translate into significant performance advancements for generations to come, once it is fully implemented as part of the GPS III architecture. Simply put, SLR techniques will improve GPS... read more

Expert Advice: Looking Back to the Early Days of GPS

September 1, 2013By

By Len Jacobson Besides my family and friends, two major influences have guided my life. One is GPS, and the other is flying, although I’m not a pilot. Most of the flying was on business trips for GPS. I’ve been writing a book about my experiences and how I helped in a small way to bring GPS to the world.... read more

Expert Advice: Little Tigers versus Wolves

July 1, 2013By
“B1 ICD was released while Regional System is officially operational, will affect domestic BDS receiver industry? Pros? Cons?”

By Greg Turetzky, Intel I recently attended the Fourth China Satellite Navigation Conference (CSNC, held May 15–17 in Wuhan, China), as an invited speaker and panelist. I had attended the third CSNC last year in Guangzho, and as expected this year’s was a little bigger and a little better. The Chinese GNSS industry is growing quickly, as evidenced by the... read more

This article is tagged with and posted in BeiDou/Compass, Expert Advice & Leadership Talks

Expert Advice: Setting Standards for Indoor Position

April 1, 2013By

Communications Security, Reliability, and Interoperability Council (CSRIC) Update By Greg Turetsky Many of us remember way back in 2001 when the FCC first announced E911 position reporting requirements for cell phones. That was a long time ago in many significant ways. Everyone had 2G phones and anxiously anticipated the arrival of 3G, and with it, data. Most people still had... read more

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