TAG: SBAS

Update on EGNOS and GAGAN SBAS Satellites

August 2, 2012By

The EGNOS SES-5 geostationary satellite launched July 9 has arrived at its orbital sot. Meanwhile, India's GAGAN satellite GSAT-10 arrives at its spaceport for launch. read more

Second Russian SBAS Satellite Prepared for Launch

August 1, 2012By

News courtesy of CANSPACE Listserv. Luch-5B, the second of a set of three geostationary satellites being launched to reactivate Roscosmos’s Luch Multifunctional Space Relay System, has been delivered to the Baikonur Cosmodrome. It arrived together with the Yamal-300K satellite in a single shipping container aboard an Antanov An-124-100 Ruslan flight from Krasnoyarsk. This marked the first time that Information Satellite... read more

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Luch 5-A Relay Satellite Arrives at New Position

July 2, 2012By

According to tracking information supplied by NORAD/JSpOC, spacecraft controllers have adjusted the orbit of the Russian SBAS satellite, Luch-5A. The satellite has been repositioned so that its sub-satellite longitude is 95 degrees east. read more

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The System: First GPS Intereference Report Sent to FCC

April 1, 2011By

First Overload Interference/Desensitization to GPS Receivers, Systems, and Networks Report to FCC; Plus Save Our GPS Coalition Forms; WAAS Official Again; EGNOS SOL Operational; Russian SBAS Satellite Passes Transponder Tests read more

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EGNOS Gets to Work

February 1, 2011By
Figure 6. Time series of horizontal positioning errors for stand-alone GPS, conventional EGNOS, and position domain EGNOS solutions at HUEG IGS station.

GPS corrections from the European Geostationary Navigation Overlay Service can improve the positioning accuracy and user experience of GPS-enabled mobile phones, even if EGNOS satellites are not visible and even when the GNSS chipset in the phone does not support satellite-based augmentation systems. read more

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On the Edge: Five Big Ones in Ten

January 1, 2011By

Look back with me at the five 2010 GNSS events that most affected surveying, mapping, engineering, construction, and natural resource users. Each one had, or could have had, a significant effect on you and your work. read more

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Expert Advice: Integrity: Lessons from the 2008 Financial Collapse

February 1, 2010By

Deterministic risk modeling, the basis of the Efficient Market Hypothesis (EMH) at the core of modern quantitative finance, is known to be fundamentally flawed, but its elegance and convenience has blinded researchers to growing evidence of its weaknesses. The near-complete acceptance of the EMH led to models that dramatically accentuate its flaws, which in turn led to absurd but eagerly accepted conclusions for loan-default risk. These models proved dramatically vulnerable to changes in the housing market in 2007–2008 and led directly to the ensuing crash. read more

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