GPS

GNSS Hotspots | January 2014

GNSS Hotspots | January 2014

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. E-CROWDSHIPPING
Palo Alto, California USA

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By Inside GNSS
Won’t Get Fooled Again

Won’t Get Fooled Again

How many times, as some once-promising politician stumbles up against his pull date, have we heard that irreverent anthem of The Who invoked?

Thousands? Millions?

Yes, back in the wreckage of the second George Bush’s second term, Barack Obama looked pretty good by comparison. Even then, though, raising the banner of “Hope” before the eyes of a desperate nation was a risky thing to do.

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By Inside GNSS
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
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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
Proposal for U.S. eLoran Service Gains Ground

Proposal for U.S. eLoran Service Gains Ground

Trying to revive a years-dead federal program is usually the kind of hopeless task that even Sisyphus wouldn’t touch.

But determined supporters of eLoran are gaining ground in their effort to resurrect the cancelled radio-navigation network and, propelled by new worries over GPS jamming, they appear poised push the issue through.

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By Dee Ann Divis
Marc Weiss

Marc Weiss

Weiss at the helm during sailboat outing to San Juan Islands (top), Marc Weiss and wife, Pam (bottom)

SIDEBAR: Marc Weiss’ Compass Points

In a career spanning nearly the entire history of GNSS-enhanced metrology, Marc Weiss has been a key participant in projects that laid the foundation for accurate synchronization of atomic clocks around the world.

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By Inside GNSS
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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
2014 Geospatial World Forum
January 11, 2014

2014 Geospatial World Forum

The Geospatial World Forum and industry exhibition will be held at the Centre International de Conférences Genève (CICG), Geneva, Switzerland on May 5-9, 2014.

The call for abstracts has closed. Early registration is open until February 15, late registration will be from February 16 to April 25. Spot registration is available after April 25.

This year’s theme is "geoSMART Planet: Resources + Infrastructure & YOU!" Program highlights include:

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By Inside GNSS
Baška GNSS Conference 2014
January 9, 2014

Baška GNSS Conference 2014

The 8th annual conference on the Croatian Adriatic aims at GNSS experts and and focuses on GNSS resilience and GNSS applications development. It will take place at Baška on the resort island of Krk in Croatia from May 7 to May 9, 2014.

The deadline for abstracts is March 1, 2014.

Topics include:

  • core satellite navigation systems’ developments and modernisation,
  • satellite-based augmentation systems (SBAS),
  • space weather and ionospheric effects on GNSS performance and operation,
  • GNSS applications for air, marine, land and personal navigation, Location-Based Services, Intelligent Transport Systems, and Search and Rescue (SaR) operations,
  • resilience development againts natural (space weather and ionospheric) and artificial (jamming, spoofing and meaconing) disruptions of GNSS services
  • statistical and digital signal processing for electronic navigation and weak signal detection,
  • GNSS receiver design (including Software-Defined and Cognitive Radio),
  • GNSS education and professional advancement,
  • advanced multidisciplinary GNSS applications (in geomatics, transport, predictive analytics, remote sensing, agriculture, geodesy, forestry, tourism, environment protection, meteorology and science),
  • GNSS advancements, parallels and alternatives,
  • regulatory and legal aspects of GNSS utilisation,
  • Special session: space weather effects on GNSS performance and operation
  • Special session: statistical signal processing and Bayesian estimation for satellite navigation, and
  • Special session: Intelligent Transport Systems (ITS)

The Royal Institute of Navigation, London, UK, Faculty of Maritime Studies, University of Rijeka, Croatia and Faculty of Transport and Traffic Sciences, University of Zagreb, Croatia, and is technically co-sponsored by Beihang University of Aeronautics and Astronautics, Beijing, China.

For more information, contact Ms. Sally-Anne Cooke, the RIN conference and events manager at conference@rin.org.uk

By Inside GNSS
GAO Faults DHS, DoT for GPS Interference/Backup Effort
January 1, 2014

GAO Faults DHS, DoT for GPS Interference/Backup Effort

Federal efforts to protect positioning, navigation and timing (PNT) signals came under sharp criticism during the December meeting of the National Space-Based Positioning, Navigation, and Timing (PNT) Advisory Board, with the Department of Homeland Security (DHS) getting a bureaucratic ear boxing for having done little so far to specifically protect GPS.

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By Inside GNSS
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