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January 8, 2010

GNSS Forum: How Galileo Can Help Europe Recover from the Economic Crisis

Back in 1999, the European Union decided to set up a global satellite navigation system (GNSS), known as Galileo, for civil and commercial use. Early 2010 the European Commission awarded the contracts for Galileo’s first satellites, launchers and support services. In 2011 the European system will finalize its validation phase. As a result, the initial service provision of Europe’s satellite navigation system could start as of early 2014.

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Modernization Milestone

Modernization Milestone

The New Year’s festivities had ended and satellite operators at the 2d Space Operations Squadron (2 SOPS) at Schriever Air Force Base, Colorado, were hard at work conducting routine operations on the GPS satellites. At around 11:30 in the morning local time (1830 UTC) on January 1, 2004, range errors for space vehicle number (SVN) 23 began to rapidly drift above the 30-meter threshold.

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New Software, Delays for GPS Control Segment, IIF Satellite

New Software, Delays for GPS Control Segment, IIF Satellite

Block IIF satellite

The U.S. Air Force GPS Wing and the 50th Space Wing will implement a new ground system software release on January 11 to enable telemetry, tracking, and commanding for the new GPS IIF satellites and provide over-the-air distribution of encryption keys for military user P(Y)-code equipment.

The software will be implemented by the GPS Master Control Center at Schriever AFB, Colorado.

Meanwhile, the schedules for launching the first IIF spacecraft and awarding the prime contract for modernization of the GPS operational control segment (OCX) continue to slip.

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By Inside GNSS
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GPS III Contractor Helps Washington Navigate the Delaware
December 26, 2009

GPS III Contractor Helps Washington Navigate the Delaware

Re-enactment of Washington’s Crossing. State of New Jersey photo

Lockheed Martin Space Systems bestowed a $400,000 Christmas present on a Pennsylvania park district, helping preserve the organization’s 57-year-old tradition of re-enacting Gen. George Washington’s crossing of the Delaware River in 1776 during the Revolutionary War.

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By Inside GNSS
GNSS Hotspots | November 2009
November 23, 2009

GNSS Hotspots | November 2009

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

1. NOTHING BEATS FREE
Mountain View, California
√ Google’s open-source, customizable Android OS uses its own maps for a free GPS feature on the new Verizon Motorola “Droid” phone. It’s shaking mobile map giants Navteq and Tele Atlas and the smart phone and PND developers who lease from them. Google’s free GPS could appear on the iPhone as well.

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By Alan Cameron
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U.S. Air Force Plans to Improve GPS Constellation Geometry for Military Forces in Afghanistan

U.S. Air Force Plans to Improve GPS Constellation Geometry for Military Forces in Afghanistan

Combined Joint Task Force 76 helicopter carries troops and supplies over Eastern Afghanistan. Photo by Staff Sgt. Michael Casteel, U.S. Army

U.S. Air Force officials are moving to reconfigure the GPS constellation to create a 27-satellite geometry that will improve the availability and accuracy of positioning, navigation, and timing (PNT) capabilities for U.S. military forces in Afghanistan and Iraq.

Although the constellation currently has 30 operational space vehicles (SVs), not including the SVN49/PRN1 that has still not been set healthy, a number of the spacecraft are located nearby other satellites — effectively creating a 24-SV geometry. (See accompanying figure.)

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By Inside GNSS
The Top Ten in PNT
October 23, 2009

The Top Ten in PNT

Since the dawn of humanity, the sky and stars have stimulated our imagination and curiosity. As our understanding about outer space increases, so does our passion and drive to explore beyond the reaches of our own planet — and to use space to understand our own planet.

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GNSS Milestones

Rome wasn’t built in a day, and neither was the Global Positioning System.

Nor will the emerging GNSS system of systems arising from the regional and global infrastructures being put in place or modernized today: GPS, GLONASS, Galileo, Compass (Beidou-2), QZSS, GAGAN, IRNSS, EGNOS, WAAS, MSAS, and undoubtedly other acronyms yet to be born.

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Fireside GPS
September 19, 2009

Fireside GPS

My history with GPS began during the time of the “Cold War” in what was then Czechoslovakia. In 1975, the ION Journal of Navigation was the only information available to me.  Despite that, my team at the Czech Technical University developed a GPS receiver and measured the position of our faculty in 1984.  In those relatively isolated years, we gained a good deal of experience with GPS signals.

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Growing Up with GNSS

Growing Up with GNSS

As I pack my bags for the damply enticing venue of Savannah, Georgia, I’m reminded that this is my 21st consecutive journey to an ION GNSS conference. And the number 21 still has a lingering resonance as the age of majority, the harbinger of having reached adulthood — if not maturity.

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