Compass/Beidou

Multi-GNSS Monitoring

Multi-GNSS Monitoring

Tim Springer, PosiTim UG

A common refrain in the world of GNSS is the desire for “interoperability,” the use of signals from multiple systems without a decline — and potentially even an improvement — in the quality of results.

Achieving this depends on large part in establishing comparable parameters — particularly the geodetic references and timing systems — among the GNSSs along with a dense network of ground reference stations that can provide continuous, precise monitoring of satellites’ orbital positions.

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By Inside GNSS
Ionospheric Scintillation
January 19, 2014

Ionospheric Scintillation

Ionospheric scintillations are rapid temporal fluctuations in both amplitude and phase of trans-ionospheric GNSS signals caused by the scattering of irregularities in the distribution of electrons encountered along the radio propagation path. The occurrence of scintillation has large day-to-day variability. The most severe scintillations are observed near the poles (at auroral latitudes) and near the equator (within ± 20 degrees of geomagnetic equator).

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By Inside GNSS
Reaching for the STARx

Reaching for the STARx

Equation 1

GNSS modernization includes not only the global coverage capabilities of GPS, GLONASS, Galileo, and BeiDou, but also regional GNSS enhancement systems such as Japan’s Quasi-Zenith Satellite System (QZSS), the Indian Regional Navigation Satellite System (IRNSS), and the European Geostationary Navigation Overlay Service (EGNOS).

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By Inside GNSS
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GNSS Hotspots | November 2013
November 30, 2013

GNSS Hotspots | November 2013

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. PAPER, PLEASE.
Silver Spring, Maryland USA
√ The USA will stop printing nautical charts next April, the end of a 150 year tradition. Why? “Declining demand, electronic and digital charts and federal budget realities,” said NOAA’s Office of Coast Survey. They will maintain and update PDFs of more than a thousand coastal charts and refer those who admire traditional lithography to private printers who can do the job.

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By Inside GNSS
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Auto Regulators Seek to Shape Navigation Devices and Apps
November 27, 2013

Auto Regulators Seek to Shape Navigation Devices and Apps

Highway safety officials are crafting guidelines aimed at pushing manufacturers to make portable electronic devices — including cell phones, hand-held navigation receivers, and navigation apps — less likely to distract drivers. They may face some push back, however, from members of Congress who are already questioning whether GNSS devices should be included under the proposed standards.
 

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By Inside GNSS
China Satellite Navigation Conference 2014 Planned for Nanjing

China Satellite Navigation Conference 2014 Planned for Nanjing

Academician Sun Jiadong, Chairman of CSNC 2014

The organizing committee for the fifth China Satellite Navigation Conference (CSNC 2014) is inviting papers for presentation at the event, scheduled May 21–23 in Nanjing.

The annual event is China’s largest and most comprehensive high-level satellite navigation academic conference. Abstracts need to be submitted by November 30 and full papers, by December 30.

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By Inside GNSS
Integrated Navigation
November 18, 2013

Integrated Navigation

GPS/BeiDou/MEMS configuration and GPS/MEMS configuration (left and right, respectively, top photo), Front view (center photo) and back view (lower photo) of nAX5.2

Due to the huge success of GPS in both military and civil applications, several other GNSSs have been developed, built, and operated in the last few decades. GNSS, regional, and augmentation systems are comprise a growing family that also includes GLONASS, Galileo, BeiDou, and Japan’s Quasi-Zenith Satellite System (QZSS). New members, such as the Global Indian Navigation System (GINS), are preparing to join in next decade.

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By Inside GNSS
5th Asia Oceania Regional Workshop on GNSS

5th Asia Oceania Regional Workshop on GNSS

The Presidential Palace in Hanoi, Vietnam

The fifth Asia Oceania Regional Workshop on GNSS will take place at the Hanoi University of Science and Technology, Hanoi, Vietnam from December 1-3, 2013.

Registration has closed.

The December 1 GNSS Tutorial Session will be "GNSS Positioning Technology".

On December 2 and 3, sessions will be devoted to GNSS applications, a group discussion on the technologies and results of the Multi-GNSS Demonstration experiment and a demonstration of emergency information distribution during disaster using GNSS.

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By Inside GNSS
ION Pacific PNT Conference 2015
November 13, 2013

ION Pacific PNT Conference 2015

ION’s Pacific PNT Conference 2015 will take place April 20-23, 2015 at the Marriott Waikiki Beach in Honolulu, Hawaii.

The conference brings together policy and technical leaders from the Pacific Rim for policy updates, program status and technical exchanges on positioning, navigation and timing. The conference will include tutorials and a table-top exhibition.

Call for Abstracts will be available in Fall 2014. Registration will open in the Winter of 2014.

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By Inside GNSS
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