A: System Categories

GLONASS: Bumpy Road
January 24, 2011

GLONASS: Bumpy Road

After technical and political setbacks, Russia gets ready to launch its first CDMA-equipped satellite in February.

Russia’s GNSS program started off the year recovering from a series of setbacks that resulted in the dismissal of two space officials in the wake of the December 5 launch failure of three GLONASS-M satellites.

The postponed launch of the next-generation GLONASS-K demonstration spacecraft in 2010 meant that the program ended up the year with four fewer satellites in orbit than expected.

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By Inside GNSS
Galileo Mid-Term Review Foresees €1.9 Billion in Additional Costs
January 18, 2011

Galileo Mid-Term Review Foresees €1.9 Billion in Additional Costs

Antonio Tajani, EC Vice-President. EC photo

A European Commission (EC) communication sent to the European Parliament and European Council today (January 18, 2011) estimates that completing a fully operational capability (FOC), 30-satellite Galileo system and the European Geostationary Navigation Overlay Service (EGNOS) will cost an additional €1.9 billion above the €3.4 billion already allocated.

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By Inside GNSS
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2011 Space Weather Workshop
January 17, 2011

2011 Space Weather Workshop

Forecasters at NOAA’s Space Weather Prediction Center (NOAA photo)

The annual Space Weather Workshop will take place on April 26-29 2011 in Boulder, Colorado.

Program organizers call it the "meeting of science, research, applications, operations and users." The program highlights space weather impacts in several areas, including
communications, navigation, spacecraft operations, aviation, and
electric power. 

Recent progress in large-scale modeling efforts will
be featured; while new developments in Sun-to-Earth coupled modeling systems
will also be a highlight.

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By Inside GNSS
Dorides to Head European GNSS Agency [updated]

Dorides to Head European GNSS Agency [updated]

[updated January 18, 2011] Carlo des Dorides has been named as the new executive director of the European GNSS Agency (formerly the Galileo Supervisory Authority or GSA).

He will succeed Heike Wieland, who leaves at the end of January to become principal legal council at the European Patent Office. Wieland served as GSA acting director following the departure of Pedro Pedreira last June.

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By Inside GNSS
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Gianni-500px.jpg
January 9, 2011

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
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
2011 West Coast Seminars: NavTech GPS
January 8, 2011

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
GPS Programs Push Ahead
January 4, 2011

GPS Programs Push Ahead

The GPS program continues progress on several fronts — in space and on the ground.

During fall 2010, the U.S. Air Force and the Raytheon Company team developing the GPS Advanced Control Segment (OCX) successfully carried out an integrated baseline review (IBR) for the next-generation system on schedule.

When completed in 2015 under the current schedule, GPS OCX will deliver control segment enhancements designed to provide secure, accurate and reliable navigation and timing information to military, commercial and civil users.

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By Inside GNSS
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