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April 2, 2017

Is That All There Is to GPS?

Looking over the initial budget of the Trump administration, we can safely say that the president and his timorous collaborators on Capitol Hill have a maximalist concept of providing for “the common defense” and a minimalist one for promoting “the general welfare,” two of the six missions enshrined in the preamble of the U.S. Constitution.

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By Inside GNSS
April 1, 2017

Galileo Success, Flexibility, and a Look Ahead

Miguel Manteiga Bautista

The first generation of the Galileo Program, at satellite and ground segment level, has been “an enormous success,” according to Miguel Manteiga Bautista, who recently spoke with Inside GNSS at his office at the European Space Agency’s European Space Research and Technology Centre (ESTEC) in Noordwijk, Netherlands.

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By Inside GNSS
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Would you prefer to have more signals or more satellites?

Q: Would you prefer to have more signals or more satellites?

A: This is somewhat of a classic GNSS question, but before getting to the answer, let’s seek some clarity about what is being asked. First, by definition, “more” signals or “more” systems must be referenced against some baseline configuration. This is commonly assumed to be a GPS L1 C/A solution, and this assumption is also used herein.

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By Inside GNSS

Bad clocks, Brexit and what’s happening at the European Space Policy Conference

Speakers at the 9th Annual Conference on European Space Policy wasted no time in addressing the somewhat worrying failure of several Galileo onboard clocks, as revealed by European Space Agency Director General Johan-Dietrich Woerner at a press briefing earlier in January in Paris. He made clear at the time that the clock failures, while indeed troubling, had had no effect on the operational integrity of the Galileo system.

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By Peter Gutierrez

Ligado Test Results Roll In

Figures and Charts

The GPS community and Virginia-based Ligado are weighing new and upcoming test results as the standoff over interference with satellite navigation services enters its seventh year.

The dispute centers on the company’s now modified proposal to build a terrestrial wireless network supported by frequencies originally allocated for satellites. Though there had been a move some years earlier to augment the satellite services with ground stations the company’s first plan envisioned some 30,000 high-powered ground terminals.

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By Dee Ann Divis
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GNSS for ERTMS Train Localization

Demo Test in Italy on Cagliari – Decimomannu line – February 24, 2017. From left: Josef Doppelbauer (Executive director of ERA – European Union Agency for Rail), Maurizio Gentile (Chief Executive Officer of RFI – Rete Ferroviaria Italiana), Jean-Pierre Loubinoux (Director General of UIC – the worldwide professional association representing the railway sector and promoting rail transport), Carlo des Dorides (Executive director of GSA).

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By Inside GNSS
January 26, 2017

GNSS Hotspots | January 2017

One of 12 magnetograms recorded at Greenwich Observatory during the Great Geomagnetic Storm of 1859
1996 soccer game in the Midwest, (Rick Dikeman image)
Nouméa ground station after the flood
A pencil and a coffee cup show the size of NASA’s teeny tiny PhoneSat
Bonus Hotspot: Naro Tartaruga AUV
Pacific lamprey spawning (photo by Jeremy Monroe, Fresh Waters Illustrated)
“Return of the Bucentaurn to the Molo on Ascension Day”, by (Giovanni Antonio Canal) Canaletto
The U.S. Naval Observatory Alternate Master Clock at 2nd Space Operations Squadron, Schriever AFB in Colorado. This photo was taken in January, 2006 during the addition of a leap second. The USNO master clocks control GPS timing. They are accurate to within one second every 20 million years (Satellites are so picky! Humans, on the other hand, just want to know if we’re too late for lunch) USAF photo by A1C Jason Ridder.
Detail of Compass/ BeiDou2 system diagram
Hotspot 6: Beluga A300 600ST

Tracking illegal logging in Romania, autonomous mining, ancient calendars and Canadian cows

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By Inside GNSS
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