A: System Categories

GLONASS for Precise Navigation in Space

GLONASS for Precise Navigation in Space

Figures and Tables

The current stage of GLONASS evolution is aimed at meeting future user requirements of which the most important is the improved accuracy of positioning.

During the implementation of the GLONASS Space Segment Modernization Program (2012–2015), the GLONASS team is facing the situation in which it is not feasible to launch new navigation satellites because the existing constellation is comprised of GLONASS-M satellites operating beyond their guaranteed design lifetime. Nine more GLONASS-M satellites are in ground storage.

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By Inside GNSS
Single Antenna, Dual Use

Single Antenna, Dual Use

A GNSS single-antenna system can be compared to a single-pixel camera. Electromagnetic waves traveling 20,000 kilometers from every overhead direction can reach us. Yet once at the antenna, this diverse set of information is collapsed into a single magnitude and phase value, then sent off to the receiver so that value can be extracted.

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By Inside GNSS
New Fiscal Year Begins with Unfinished GPS Business

New Fiscal Year Begins with Unfinished GPS Business

Most folks look to a new year as an opportunity for fresh starts and new projects. For the GPS community, however, the October 1 start of the 2016 federal fiscal year (FY16) will likely be more about the hangover — that is, the issues that are hanging over into the next 12 months, unresolved.

At the top of that list of unfinished business are two system decisions: a go/no-go determination on whether the United States will build eLoran as the U.S. backup to GPS and deciding whether or not to choose a new contractor for the GPS III program.

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By Dee Ann Divis
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GNSS User Meet 2015
September 2, 2015

GNSS User Meet 2015

The GNSS User Meet 2015 will be jointly hosted at the ISRO Satellite Centre in Bengaluru by the Indian Space Research Organisation (ISRO) and the Airports Authority of India on the theme, “Towards Self Reliance in Satellite Navigation."The technical program will include plenary talks, paper presentations, poster sessions, and panel discussions.

Participation is invited from the GNSS user community, including various government departments, academia, GNSS receiver manufacturers, research laboratories, and so forth.

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By Inside GNSS
LightSquared Launches New GPS Receiver Tests

LightSquared Launches New GPS Receiver Tests

LightSquared’s proposed GPS receiver tests are relying on an outdated standard of GPS accuracy, a choice some experts suggest is a maneuver aimed at dramatically lowering the bar the would-be wireless broadband company has to meet for showing noninterference to GPS signals.

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By Inside GNSS
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PTTI 2016: Precise Time and Time Interval Meeting
August 19, 2015

PTTI 2016: Precise Time and Time Interval Meeting

The Precise Time and Time Interval Systems and Applications meeting is technical conference held each year for PTTI managers, system engineers and program planners. It will be held at the Hyatt Regency in Monterey, California on January 25 through 28. It is sponsored by the Institute of Navigation (ION).

In 2016, for the first time, PTTI will be co-located with the ION International Technical Meeting. Registration for one event entitles attendees to attend all sessions of both events.

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By Inside GNSS
Ultra-wideband Re-emerges as a GNSS Interference Issue

Ultra-wideband Re-emerges as a GNSS Interference Issue

The Federal Communications Commission (FCC) is weighing a request to waive spectrum rules for a new ultra-wideband (UWB) device that would operate across a wide swath of frequencies including those used by satellite navigation. The proposal has prompted a call for a wider reconsideration of ultra-wideband limits, a suggestion opposed by the GPS community.

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By Inside GNSS
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