GNSS (all systems)

Wavelets and Notch Filtering

Wavelets and Notch Filtering

FIGURE 1: Touching wavelet spectra

For the complete story, including figures, graphs, and images, please download the PDF of the article, above.

The use of GNSS for safety critical applications is gaining interest, particularly amongst aviation users, who probably have the most demanding requirements. The GNSS frequency band containing the Galileo E5 and GPS L5 signals is designated as an aeronautical radio navigation service (ARNS) band, which enjoys legal protection from other services not allocated to this frequency on a primary basis.

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By Inside GNSS
Gianni-500px.jpg

A Model-Based Approach

For the complete story, including figures, graphs, and images, please download the PDF of the article, above.

Galileo receiver designers require formal interface specifications for the Galileo signal-in-space (SIS) in order to write unambiguous and accurate specifications for Galileo receivers. To compute their positions, Galileo receivers must be able to retrieve timing and orbital information from the data stream conveyed in Galileo analog signals.

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By Inside GNSS
Indian Regional Navigation Satellite System

Indian Regional Navigation Satellite System

FIGURES 1, 2 & 3

For the complete story, including figures, graphs, and images, please download the PDF of the article, above.

In satellite navigation, a GNSS receiver must account for several sources of error such as relativistic effects, atmospheric propagation delay, offset of satellite clocks from system time and satellite ephemeris. In order to accurately compute user position, velocity, and time (PVT), these errors need to be predicted/estimated precisely.

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By Inside GNSS
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GNSS Interference, Detection and Mitigation

GNSS Interference, Detection and Mitigation

Bushy House

Britain’s Position, Navigation and Timing Network of the Digital Systems
KTN (Knowledge Transfer Network) presents a one-day workshop on
"GNSS Interference, Detection and Mitigation."

Professor Martyn Thomas will present the
conclusions of the Royal Academy of Engineering report on GNSS vulnerability, which was released on March 8.  

The workshop will take place at Bushy House, National Physical Laboratory, Teddington, Middlesex on Thursday, March 10 2011 from 10 a.m. to 4 p.m.

Topics include:

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By Inside GNSS
Natural Threats to GNSS Positioning
January 8, 2011

Natural Threats to GNSS Positioning

Bushy House

Britain’s Position, Navigation and Timing Network of the Digital Systems KTN (Knowledge Transfer Network) presents a one-day workshop on "Natural Threats to GNSS Positioning."

It will take place at Bushy House, National Physical Laboratory, Teddington, Middlesex on Wednesday, January 19 2011 from 10:00 a.m. to 3:30 p.m.

A number of natural phenomenon affect GNSS reliability and accuracy. These include:

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By Inside GNSS
2011 West Coast Seminars: NavTech GPS

2011 West Coast Seminars: NavTech GPS

NavTech GPS will offer its 2011 west coast GNSS technical seminars at the Doubletree Hotel in San Diego, California from Monday, March 28 through Friday, April 1.

Over 25 years, NavTech GPS has provided GPS/GNSS applications solutions for military and research customers, with product choices from more than 30 manufacturers, and has organized basic and advanced GNSS seminars for engineers and technical professionals all over the United States.

The San Diego seminars include:

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By Inside GNSS
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GNSS Interoperability, or Can’t We All Just Get Along Together?

GNSS Interoperability, or Can’t We All Just Get Along Together?

Simple harmonic motion

Return to "GNSS Year in Review"

At first glance, interoperability and its implication of at least some degree of cooperation seem at odds with the idea of competing GNSS systems.

Yet the mantra of compatibility, interoperability, and even — in the terminology of GPS pioneer Brad Parkinson —interchangeability has taken on a nearly unanimous harmony in the pronouncements and deliberations of GNSS leaders.

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By Inside GNSS
GNSS Year in Review: Three Trends That Matter

GNSS Year in Review: Three Trends That Matter

Yes, it’s that time — when we try to anticipate what 2011 holds for GNSS by analyzing (or just trying to remember) the highlights of the past 12 months in our global navigation satellite system industry.

First, 2010 was a busy year. Successful launches of 13 new satellites brought the number of GNSS spacecraft in orbit to more than 60. The highest level yet for both numbers launched and in the collective GNSS constellation.

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By Inside GNSS
Handicapping the GNSS Horse Race

Handicapping the GNSS Horse Race

Horses racing by Margret Hofheinz-Doering 1956

Return to "GNSS Year in Review"

We’ve come a long ways from the attitudes of the Cold War environment in which the Global Positioning System and GLONASS programs arose.

But that doesn’t mean that GNSS competition is a thing of the past. Indeed, the second most-read item on the Inside GNSS website during this year was a March 2009 article entired “GPS, GLONASS, Galileo, Compass: What GNSS Race? What Competition?”

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By Inside GNSS
ION GNSS 2011: 24th Institute of Navigation GNSS Conference
December 15, 2010

ION GNSS 2011: 24th Institute of Navigation GNSS Conference

Portland waterfront walk, west side

ION GNSS 2011 will take place at the Oregon Convention Center in Portland, Oregon from September 20-23. Tutorials will be held on September 19 and 20.

This will be the 24th international technical meeting of the Satellite Division of the Institute of Navigation. It is the world’s largest and oldest GNSS conference,
founded in 1987 as the ION GPS conference.

The headquarters hotel is Portland’s downtown Hilton and Executive Tower.

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By Inside GNSS
GNSS Awards and Honors: NovAtel, Raven, PTTI
December 8, 2010

GNSS Awards and Honors: NovAtel, Raven, PTTI

As the end of 2010 approaches, many organizations award the special efforts and accomplishments of companies and individuals during the past year.

The GNSS industry is no exception. Here are some of the most recent awards and honors.

NovAtel Wins Export Award
NovAtel Inc., has won the 2010 Alberta Export Award for Advancing Technologies, an award that recognizes companies who “have effectively harnessed the powers of intellectual property and value-added know-how.”

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By Inside GNSS
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