Featured Stories

Sixth Galileo Satellite Reaches Corrected Orbit

March 13, 2015By
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The sixth Galileo satellite of Europe’s navigation system has entered its corrected target orbit, which will allow detailed testing to assess the performance of its navigation payload. read more

Launch Prep on Track for Galileo’s Next FOC Satellites

March 12, 2015By
Soyuz’ Block I third stage is mated to the launcher at the Spaceport’s MIK integration building.

Preparations for Arianespace’s next Soyuz flight, which will lift into orbit two more Galileo satellites, are in full swing at multiple locations across the spaceport in French Guiana. Work includes a key integration step for the medium-lift launcher, plus the start-up of fueling for its Galileo satellite passengers. Soyuz’ Block I third stage was mated to the vehicle’s core during activity today in the... read more

Galileo Satellites Ready for Fueling as Launcher Takes Shape

March 9, 2015By
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By the European Space Agency All the elements for this month’s Galileo launch are coming together at Europe’s Spaceport in French Guiana. As the two satellites undergo final testing and preparations, the first part of their Soyuz launcher has also been integrated. Assembly of the Soyuz ST-B’s first two stages, plus its four first stage boosters, took place at the... read more

Antenna Array and Receiver Testing with a Multi-RF Output GNSS Simulator

March 6, 2015By
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This article discusses the GALANT adaptively steered antenna array and receiver, demonstrating the test scenarios generated with the GNSS simulator. Exemplary results of different static and dynamic test scenarios are presented, validating the attitude determination capabilities as well as the interference detection and mitigation capabilities. read more

Langley’s Ionosphere Research Focus of CBC Report

March 5, 2015By
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CBC News interviewed GPS World Innovation Editor Richard Langley about his ionosphere interference research project with NASA, reported on earlier this week. Langley, a professor at the University of New Brunswick, is working with the Jet Propulsion Laboratory in California to better understand how the ionosphere is disturbed by a variety of phenomena including solar outbursts and other natural hazards such as... read more

BeiDou Numbering Presents Leap-Second Issue

March 3, 2015By
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During preparation of playback scenarios for the upcoming leap-second event taking place in June, engineers at Racelogic identified a potential pitfall for GNSS engineers. The difficulty arises from the fact that BeiDou uses a different “day number” for the date to apply the leap second, compared with GPS and Galileo. GPS and Galileo use 1-7 as week day numbers, and... read more

Expert Advice: A Leap into the Unknown?

March 1, 2015By
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A leap second will be introduced this year at 23:59 on June 30. This phenomenon comes around periodically and is necessary for keeping UTC in line with the Earth’s slowing rotation. Although it will pass unnoticed by most, it has implications for anyone involved in the development of GNSS-enabled devices. For some, it can be the cause of a major headache. read more

Study of Atmospheric ‘Froth’ May Help GPS Communications

February 26, 2015By
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GPS World Innovation editor Richard Langley has co-authored a study, described below, exploring how irregularities in Earth’s upper atmosphere can distort GPS signals, an important step toward mitigation. read more