A: System Categories

September 17, 2014

Alison Brown: Tally Ho! The Hunt for GNSS Innovations

In 2005, Alison Brown was the first Sidney Sussex College woman alumna to be named as an honorary Fellow in recognition of her distinguished technical contributions. Pictured here with Keith Glover, now head of engineering at Cambridge University, who taught Brown control systems engineering, and Donald Green, her director of studies while she was an undergraduate.

SIDEBAR: Alison Brown’s Compass Points

On display in the Smithsonian’s “Time and Navigation” exhibit in Washington D.C. is the world’s first GPS-enabled cell phone. It was developed in 1995 by NAVSYS Corporation, a Colorado GNSS and inertial R& D company, as part of the push to build a national emergency notification system for mobile users, E911.

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By Inside GNSS

SAGAIE

Scintillation — rapid RF signal frequency and amplitude changes due to signal propagation path changes and phase shifting caused by solar turbulence in the ionosphere — is well known in the GNSS community. However, conclusive scientific studies that cover the whole extent of the question are hard to find. Galileo In-Orbit Validation Experiment (GIOVE) data processing confirmed the effects of scintillation on GNSS receivers, as described in the paper by J. Giraud listed in the Additional Resources section near the end of this article.

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By Inside GNSS
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Fourth International School on Satellite Navigation

The 4th International School on Satellite Navigation is underway in the GLONASS Learning Centre in Moscow, Russia. The school runs through September 24

The event is organized by Roscosmos and JSC Russian Space Systems.

Lectures and hands-on studies cover the history, current status and future of the GNSSes, particularly the use of GLONASS in the Russian economy. It includes two series of lectures and practical exercises of 36 hours each. The first covers satellite navigation and the second the combined use of Earth Remote Sensing and GNSS data.

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By Inside GNSS
September 16, 2014

Harold Martin Returns to PNT NCO as Director

Harold “Stormy” Martin

Harold W. "Stormy" Martin III will be the new director of the National Coordination Office (NCO) for Space-Based Positioning, Navigation, and Timing (PNT), the focal point for federal agencies working out GPS policy issues.

Martin was the deputy director of the NCO and an Air Force colonel until this summer when he retired from the military. He will succeed Jan Brecht-Clark, who retired at the end of 2013. His start date as director has not been set.

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By Inside GNSS

ESA Outlines Efforts to Rescue Wayward Galileo Satellites

Orbits of the fifth and sixth Galileo satellites launched together on August 22, 2014, in red, compared to their intended position, in dashed green, and the position of the four IOV satellites launched in 2011 and 2012 in solid green. This view looks down over Earth’s South Pole, helping to illustrate how the two satellites’ orbital inclination relative to the equator is less than was intended ESA illustration.

The European Space Agency (ESA) released dramatic illustrations today (September 16, 2014) of the orbital locations of the two errant Galileo spacecraft launched on August 22, the intended orbit, and the locations of four In-Orbit Validation (IOV) satellites.

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By Inside GNSS
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September 6, 2014

Munich Satellite Navigation Summit 2015

The Antiquarium in the Residenz München

The Munich Satellite Navigation Summit will take place at the Residenz Muenchen in Munich, Germany on March 24 – 26, 2015.

Register here

The theme for this year’s summit is “Future of PNT – A Glance into the Crystal Ball”.

The technical program includes plenary discussions and updates on the main activities in worldwide satellite navigation systems, including:

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By Inside GNSS
September 5, 2014

NaviForum Shanghai 2014

Shanghai skyline

The 2014 Shanghai International Forum on Navigation Industry and Technology Development (NaviForum) will be held at the Shanghai Marriott Hotel Hongqiao in Shanghai, China on November 3, 2014.

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By Inside GNSS
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