A: System Categories

New BeiDou ICD Describes Second Civil Signal; Officials Describe Progress, Plans

New BeiDou ICD Describes Second Civil Signal; Officials Describe Progress, Plans

At a news media conference in Beijing on the first anniversary of the BeiDou Navigation Satellite System (BDS) declaration of full operational capability (FOC) for its regional service, officials reported on the current performance of China’s GNSS system.

The BDS program also released two new technical documents, including an updated interface control document (ICD) that describes the second civil signal, B2I, and a “BDS Open Service Performance Standard (version 1.0).”

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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
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Multi-GNSS Monitoring

Multi-GNSS Monitoring

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
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
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Reaching for the STARx

Reaching for the STARx

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
Galileo Funding, Satellite Tests Move Program Back on Track
January 16, 2014

Galileo Funding, Satellite Tests Move Program Back on Track

Approval by the European Parliament of the new 2014-2020 European Union (EU) budget last November was widely seen as a step in the right direction for the 28-nation union, after more than a year of sometimes bitter monetary wrangling.

The Parliament quickly followed the move by voting to approve the financing and governance of Europe’s satellite navigation program over the same period. The measure passed the Parliamentary ballot by an impressive margin, with 603 votes in favor, 29 against, and 59 abstentions.

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By Inside GNSS
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