201503 March/April 2015 Archives - Page 2 of 2 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

201503 March/April 2015

How does a GNSS receiver estimate velocity?

Equations 1 – 11

Q: How does a GNSS receiver estimate velocity?

A: Stand-alone single-frequency GNSS receivers represent the largest slice of the commercial positioning market. Such receivers operate mainly in single point position (SPP) mode and estimate velocity either by differencing two consecutive positions (i.e., approximating the derivative of user position) or by using Doppler measurements related to user-satellite motion.

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By Inside GNSS

Seriously Seeking a Galileo Service Operator

Carlo des Dorides, El?bieta Bie?kowska

Last January, the European GNSS Agency (GSA) announced a new invitation to tender for the role of Galileo service operator (GSOp). Speaking at the recent EU Space Policy Conference in Brussels, GSA Executive Director Carlo des Dorides called it the largest contract ever to be awarded under the Galileo program.

“It will shape the future of Galileo,” he said.

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By Peter Gutierrez

Expanding EGNOS Horizons

GPS+EGNOS tracking device able to use EGNOS OS and EDAS mounted on a container

The European Geostationary Navigation Overlay Service (EGNOS) has a European regional coverage that could be extended quite easily to areas adjacent to the European Union. Backed by the European Commission, a public/private consortium is operating programs of technical assistance to prepare nations in the Mediterranean region to adopt and exploit European GNSS services in their priority market segments, namely aviation and road freight transport/logistics.

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By Inside GNSS
March 5, 2015

UAV Want List (with GNSS Already on Board): A Coherent Regulatory Framework for Europe

Chris Blackford of Sky-Futures speaking at AUVSI’s Unmanned Systems Europe 2015. Peter Gutierrez photo

Just as you do when you get in your car, the UAS, UAV, drone, RPAS and even ROAV communities — who probably need to agree on an acronym — are beginning to take GNSS for granted. But presenters at the AUVSI Unmanned Systems Europe 2015 conference held Tuesday and Wednesday (March 3–4, 2015) in Brussels had little to say on the subject, to our great disappointment, even though virtually all of the vehicle/vessel systems under discussion use it and need it.

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By Inside GNSS
February 27, 2015

FCC Issues New Rules on E911 Location Standards, Options Besides GNSS

New rules recently adopted by the Federal Communications Commission (FCC) to help emergency responders better locate wireless 911 callers highlight the role of GPS and GNSS technologies while boosting the use of alternative positioning technologies in indoor locations.

However, the new enhanced (11 (E911) rules, adopted January 29 and published on February 4, explicitly avoided a decision on the use of GNSS systems other than GPS.

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By Inside GNSS

GNSS Vulnerability Scores at Wide-Ranging INC 2015

Ray Clore, U.S. State Department. Peter Gutierrez photo

Almost half of the sessions at the International Navigation Conference (INC) 2015 held this week (February 24–26) in Manchester, England, were devoted to the theme of GNSS resilience and vulnerability, a topic that Dana Goward of the Resilient Navigation and Timing Foundation has been trying to drive home for years.

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By Inside GNSS

Unsatisfied with ICAO’s Pace, Congress May Push U.S. Aircraft Tracking Requirement

U.S. lawmakers, dissatisfied with the pace of international efforts to prevent losses like that of an Malaysia Airlines plane last year, may push through legislation requiring tracking capability on planes operating in the United States.

Nearly a year after flight MH370 disappeared over the Indian Ocean, the International Civil Aviation Organization (ICAO) is a year away from adopting a standard for aircraft tracking technology, Ambassador Michael Lawson, the U. S. representative to the organization told lawmakers on Wednesday.

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By Inside GNSS
February 15, 2015

FAA, White House Lay Out Path for Small UAS Operations

Apparently working overtime during the President’s Day weekend, the U.S. Department of Transportation’s Federal Aviation Administration (FAA) today  (February 15, 2015) proposed a framework of regulations <http://www.faa.gov/regulations_policies/rulemaking/recently_published> that would allow routine use of certain small unmanned aircraft systems (UAS) while maintaining flexibility to accommodate future technological innovations. An overview of the small UAS rule can be viewed at

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By Inside GNSS