GNSS (all systems) Archives - Page 149 of 169 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

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.

By Inside GNSS

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.

By Inside GNSS

LightSquared Asks for More Time to Contest FCC Action on GPS Interference

Charging the Federal Communications Commission (FCC) with a “rush to judgment,” LightSquared Inc. is seeking an extension of more than a month to comment on the FCC’s intention to prohibit the company from building a high-powered wireless broadband network in RF spectrum next to GPS and other GNSS services.

By Inside GNSS

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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.

By Inside GNSS

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.

By Inside GNSS

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."

By Inside GNSS

February 3, 2012

GNSS Manufacturer Trimble Reports Strong Growth in 2011, Predicts More in 2012

Trimble’s year-on-year revenues grew 35 percent to $435.2 million in the fourth quarter of 2011, while GAAP net income declined 20 percent, according to results reported by the Sunnyvale, California–based company on February 2.

For the 2011 fiscal year, revenue was $1.64 billion, up approximately 27 percent from FY 2010.

By Inside GNSS

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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.

By Inside GNSS

January 17, 2012

ICCE 2012 Special Session: Satellite Navigation Technologies

Saigon Morin Hotel in Hue, Vietnam

A special session on Satellite Navigation Technologies will be held as part of the 2012 International Conference on Communications and Electronics (ICCE) at the Saigon Morin Hotel in Hue, Vietnam on August 1-3.

Because South East Asia will be covered by all of the global and regional satellite navigation systems by 2015, the region will experience the multi-GNSS environment at its edge.

By Inside GNSS

After Longitude – Modern Navigation in Context

Cadets with sextants circa 1930 (from National Maritime Museum collections)

The "After Longitude" symposium covers what happened in between Harrison’s clocks and geospatial PNT. It is sponsored by the British National Maritime Museum and the Royal Institute of Navigation.

The event takes place on March 22 and 23 at the National Maritime Museum in Greenwich.

Speakers on Thursday, March 22 will cover the earlier history of navigation. On Friday, topics include:

By Inside GNSS

January 16, 2012

2012 International GPS/GNSS Showcase

The 2012 International GPS/GNSS Showcase will take place at Chulalongkorn University, Department of Survey Engineering, in Bangkok on January 17.

The event promotes cooperation and research on GPS and GNSS applications in the Asia Pacific region.

By Inside GNSS

FIG /IAG Technical Seminar: Reference Frame in Practice

Monte Mario, the highest hill in Rome

A special seminar for geodesists will take place in Rome, Italy on May 4 and 5, just before the 35th FIG general assembly and working week.

The conference venue is the Cavalieri hotel on Monte Mario near the Vatican.

It is organized by the International Association of Geodesy (IAG), the surveyors’ international association (FIG) and the UN’s International Committee on GNSS (ICG).

By Inside GNSS

Hexagon 2012

A number of user conferences for customers of Hexagon AB’s precise measurement brands and products will be combined in the Swedish corporation’s second international conference this summer.

By Inside GNSS

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GNSS (all systems)

Going to Nashville in September? Submit your ION GNSS 2012 Abstra...

Web Seminar on Challenges of GNSS/Inertial Integration Gets Thumb...

LightSquared CEO Resigns Amid GPS Interference Controversy

Solar Max and Space Weather Prediction

LightSquared Asks for More Time to Contest FCC Action on GPS Interference

Topcon Introduces Full-Spectrum GNSS Geodetic Antenna

Challenges in GNSS /INS Integration

GNSS Vulnerability: Present Dangers and Future Threats

GNSS Manufacturer Trimble Reports Strong Growth in 2011, Predicts More in 2012

GNSS Hotspots | January 2012

ICCE 2012 Special Session: Satellite Navigation Technologies

After Longitude – Modern Navigation in Context

2012 International GPS/GNSS Showcase

FIG /IAG Technical Seminar: Reference Frame in Practice

Hexagon 2012