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GNSS (all systems)

NAV12 and the Royal Institute of Navigation Request Your Papers, Please
March 20, 2012

NAV12 and the Royal Institute of Navigation Request Your Papers, Please

The University Park Hotel under construction next to the East Midlands Conference Centre

The British Royal Institute of Navigation has given prospective authors a May 4 deadline for abstracts for its annual conference, NAV12. The theme this year is "GNSS and Beyond."

Authors have a broad choice of navigation and technology topics from GNSS, eLoran and integrated systems technology to satellite navigation vulnerabilities to jamming and space weather to low-cost consumer apps design.

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By Inside GNSS
Coarse Time Positioning
March 15, 2012

Coarse Time Positioning

Q: What is Coarse Time Positioning and how does it work?  

A: Coarse time positioning is used to provide a position fix using inaccurate time information when tracking sufficiently weak GNSS signals such that the navigation message cannot be extracted reliably. This article presents the key aspects of coarse positioning, including some of its challenges. To start, however, we begin by looking at the role of time within a GNSS receiver.

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By Inside GNSS
GPS Dot Hanks image.jpg

The GPS Dot and its Discontents

In-home construction of the first civilian-owned civil GPS spoofer.

Over the last few years, several of us in the GNSS community have done our best to convince our colleagues, policymakers, and the general public that unsavory characters with GNSS jammers or spoofers are a genuine threat to GNSS and an orderly society.

"But who would want to use a jammer or spoofer?” people ask.

My response? Hackers, because they can. Thieves planning to snatch expensive cargo. A moonlighting employee in the company car. Worse yet, state actors or terrorists targeting our national infrastructure.

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By Inside GNSS
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Going to Nashville in September? Submit your ION GNSS 2012 Abstracts by March 9
March 7, 2012

Going to Nashville in September? Submit your ION GNSS 2012 Abstracts by March 9

Aerial view of downtown Nashville, Tennessee USA

Join the 250 other technical presenters at this year’s Institute of Navigation GNSS conference and submit your abstract by Friday, March 9.

The U.S. Institute of Navigation sponsors the world’s oldest and largest conference on global navigation satellite systems. ION GNSS 2012 will take place next September 17 through 21 at the Nashville Convention Center in Tennessee. Tutorials and the CGSIC meeting will take place on September 17 and 18.

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By Inside GNSS
Web Seminar on Challenges of GNSS/Inertial Integration Gets Thumbs Up
February 29, 2012

Web Seminar on Challenges of GNSS/Inertial Integration Gets Thumbs Up

Nearly 400 system integrators, equipment manufacturers, product/application designers, and other professionals from around the world tuned into a live broadcast web seminar presented by Inside GNSS on February 28 with the subject, “Challenges of GNSS/Inertial Integration.”

A link to the recorded version is available here. If you already registered and would like to review the webinar, just sign in. If you have not yet registered, you may do so now. Registration is free.

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By Inside GNSS
LightSquared CEO Resigns Amid GPS Interference Controversy
February 28, 2012

LightSquared CEO Resigns Amid GPS Interference Controversy

Sanjiv Ahuja

LightSquared announced today (February 28, 2012) that Sanjiv Ahuja has resigned his position as chief executive officer of LightSquared, Inc. He will continue to serve as chairman of the board.

Ahuja’s resignation is the latest development in the company’s attempt to establish a nationwide terrestrial wireless broadband network in spectrum adjacent to that used by GPS and other GNSS L1 services. No explanation was given for his departure.

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By Inside GNSS
Solar Max and Space Weather Prediction
February 25, 2012

Solar Max and Space Weather Prediction

Dr. Genene Fisher

On any given day — especially cloudy winter days — most people may not give a lot of thought to the Sun.

More than 150 million kilometers (93.2 million miles) away, its remoteness belies the enormous forces at work in this yellow dwarf star with a mass 330,000 times that of Earth. If someone asked us to name its harmful effects, we might come up with sunburn, heat stroke, skin cancer.

But many in the GNSS community know better.

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By Inside GNSS
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Topcon Introduces Full-Spectrum GNSS Geodetic Antenna
February 16, 2012

Topcon Introduces Full-Spectrum GNSS Geodetic Antenna

Topcon CR-G5 GNSS antenna

Topcon Positioning Systems (TPS) announced the company’s new CR-G5 high-performance, GNSS choke ring antenna.

Based on the company’s new TA-5 full-spectrum GNSS antenna element, the CR-G5 geodetic antenna offers excellent vertical phase center stability over the GNSS frequency band superior performance in tracking low elevation satellite signals, according to the company.

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By Inside GNSS
Challenges in GNSS /INS Integration
February 11, 2012

Challenges in GNSS /INS Integration

Dr. Andrey Soloviev, Qunav

GNSS and inertial technologies have a complicated mutual history.

Once competitors for navigation and positioning applications, they now appear ever more frequently in complementary roles — often within the same solution or system design.

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By Inside GNSS
GNSS Vulnerability: Present Dangers and Future Threats
February 10, 2012

GNSS Vulnerability: Present Dangers and Future Threats

National Physical Laboratory entrance

This free one-day event at the British National Physical Laboratory in Teddington (London) on Wednesday, February 22 will present results of current jamming detection, and consider emerging threats such as meaconing and spoofing.The seminar runs from 9:30 a.m. to 5:30 p.m.

Interested participants must pre-register online.

Todd Humphreys, director of the Radionavigation Laboratory at the University of Texas-Austin will deliver the keynote, "PVT security: privacy and trustworthiness."

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By Inside GNSS
GNSS Hotspots | January 2012
January 19, 2012

GNSS Hotspots | January 2012

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. ICE BREAKER
Nome, Alaska USA
√ Two 2 1/2 pound GPS-guided UAVs that tolerate extreme cold helped bring fuel to snowbound Nome, Alaska over two weeks in January. On daily photographic missions, the Aeryon Scouts helped University of Fairbanks researchers map ice thickness in the frozen harbor so a Coast Guard icebreaker could slowly guide a Russian fuel tanker close enough to pump the fuel to shore.

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By Inside GNSS
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