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GNSS (all systems)

Telematics@China Conference
September 4, 2011

Telematics@China Conference

The 2011 Telematics@China conference and exhibition will be held at the Shanghai Marriott Hotel City Centre in Shanghai, China from Wednesday through Friday, December 7-9.

The annual event, which began in 2008, is sponsored by the Automotive Engineers of China (SAE-China) and supported by a number of government departments. The conference will feature 90 speakers from all sectors of the telematics industry. Organizers expect 1,000 attendees from China and the rest of the world.

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By Inside GNSS
Trimble Launches New OEM GNSS Modules, Enclosure
August 26, 2011

Trimble Launches New OEM GNSS Modules, Enclosure

Trimble BD920

Trimble has introduced two new GNSS OEM modules, the BD910 and BD920, featuring centimeter-level, real-time kinematic (RTK) positioning capabilities optimized for high-precision and control applications.

The BD910 and BD920 modules are designed to allow OEMs and system integrators to easily add centimeter-level positioning to specialized or custom hardware solutions.

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By Inside GNSS
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Trimble Introduces New OEM GNSS/Inertial Integrated Products
August 16, 2011

Trimble Introduces New OEM GNSS/Inertial Integrated Products

Trimble has introduced its next generation AP Series of embedded GNSS-inertial OEM modules plus inertial measurement units (IMUs), featuring a 220-channel multi-frequency GNSS receiver with dual-antenna heading support.

The company announced the new products today (August 16, 2011) at AUVSI’s Unmanned Systems North America 2011 Conference and Exhibition.

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By Inside GNSS
Australian Satellite Navigation and Positioning Lab Founder to Head IAG
August 1, 2011

Australian Satellite Navigation and Positioning Lab Founder to Head IAG

Chris Rizos

The founder of Australia’s largest concentration of GNSS research and development efforts has been named head of the International Association of Geodesy, part of the International Union of Geodesy and Geophysics (IUGG) 

Chris Rizos put together the Satellite Navigation and Positioning laboratory (SNAP) at the University of New South Wales in the 1990s.  He has been researching and writing about high precision technology and applications of GNSS since 1985 and is a professor and head of the surveying and spatial information school at the university.

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By Inside GNSS
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GNSS Experts to Judge 2011 Satellite Navigation Applications Idea Contest
July 29, 2011

GNSS Experts to Judge 2011 Satellite Navigation Applications Idea Contest

Find out more about 2011 USA Challenge applications ideas

Six judges — satellite navigation engineering experts from Stanford University, the Air Force Institute of Technology, Overlook Systems, NovAtel, KLA Global, the Institute of Navigation, and Inside GNSS — will select the finalists in the 2011 USA Challenge, one of 23 regional contests in this year’s European Satellite Navigation Competition (ESNC).

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By Inside GNSS
GNSS Hotspots | July 2011
July 28, 2011

GNSS Hotspots | July 2011

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. AQUARIUS
Buenos Aires, Argentina and Vandenberg AFB, California, USA

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By Inside GNSS
EC Official Adds Galileo, EGNOS Worries to FCC’s LightSquared-GPS Deliberations
July 20, 2011

EC Official Adds Galileo, EGNOS Worries to FCC’s LightSquared-GPS Deliberations

European Geostationary Navigation Overlay Service (EGNOS). ESA illustration

Citing European Space Agency (ESA) studies that showed “harmful interference” to Galileo receivers operating up to 1,000 kilometers from LightSquared base stations, a European Commission (EC) official has told the Federal Communications Commission (FCC) about his “deep concerns” about the wireless broadband company’s terrestrial transmissions in the 1525–1559 MHz band next to L1 GNSS frequencies.

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By Inside GNSS
GNSS-Based Attitude Determination
July 11, 2011

GNSS-Based Attitude Determination

FIGURE 1: Heading, bank and elevation angles of an actual platform carrying two perpendicular two meter-long baselines. The attitude solutions are shown for both the derived, or float, measurements (top), as well as the carrier phase-based, or fixed, measurements obtained after having correctly resolved the integer ambiguities (bottom). Precision differs between the methods by two orders of magnitude. Gray dots represent the two-dimensional projections on each of the three coordinate planes.

Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.

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By Inside GNSS
What is a virtual reference station and how does it work?

What is a virtual reference station and how does it work?

Q: What is a virtual reference station and how does it work?

A: To reach centimeter-level — or even better — accuracy of positioning typically requires use of precise dual-frequency carrier phase observations. Furthermore, these observations are usually processed using a differential GNSS (DGNSS) algorithm, such as real time kinematic (RTK) or post-processing (PP). Regardless of the specific differential algorithm, however, implicit in the process is an assumption that the quality of the reference station data is consistent with the desired level of positioning accuracy.

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By Inside GNSS
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