Inside GNSS: Engineering Solutions from the Global Navigation Satellite System Community
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Thought Leadership Series
April 10, 2010

FAA Predicts Erosion of GPS WAAS Service Due to Intelsat GEO Failure

[updated April 13] Federal Aviation Administration (FAA) officials say that loss of control over an Intelsat geostationary (GEO) carrying a GPS Wide Area Augmentation System (WAAS) transponder could subject users in the National Air Space (NAS) to temporary outages for the rest of this year, beginning within the next two to four weeks as the GEO drifts out of a useable orbit.

Intelsat S.A. announced the anomaly in Galaxy 15 (G-15) on April 8. Although the communications services provided by G-15, located at 133 degrees west longitude (WL), have not been affected, according to Intelsat, the satellite apparently is not responding to commands by controllers. The anomalous condition began on April 3, according to the FAA.

The Luxembourg-based Intelsat is moving an older spacecraft (G-12) that serves as a backup for G-15 from its location at 123 degrees WL. However, G-12 does not have an L-band transponder, which is needed for WAAS transmissions.

April 9, 2010

Canada to Decommission DGPS System

The Canada-wide DGPS Service (CDGPS), a free GNSS augmentation system initiated by the Canadian Council on Geomatics (CCOG) in 2003, will be decommissioned by March 31, 2011, according to Gary Sawayama, the system’s general manager.

The CDGPS L-band broadcast has been carried by SkyTerra Communications Inc.’s MSAT communications satellites, which are expected to be replaced this year by the next-generation SkyTerra satellites. Significant new investment in infrastructural changes would be required to migrate to a new communication satellite.

September 15, 2010 - September 17, 2010
Zurich, Switzerland
September 23, 2010 - September 25, 2010
Gdynia, Poland
March 29, 2010

European GNSS Supervisory Authority Launches EGNOS Portal

The European GNSS Supervisory Authority (GSA), on behalf of the European Commission, has launched an Internet portal for the European Geostationary Navigation Overlay Service (EGNOS) designed to help developers and entrepreneurs vying for a slice of the emerging satellite navigation market.

The European counterpart to the U.S. GPS Wide Area Augmentation System (WAAS), EGNOS is a satellite-based augmentation system that provides real-time differential corrections and integrity information about GPS operations.

December 8, 2010 - December 10, 2010
Noordwijk, Netherlands
Inside GNSS • May 2010

GPS: The Present Imperfect

SIDEBAR: Four Popular Myths about GNSS
SIDEBAR: To the Rescue: eLoran?

Quietly but surely, positioning, navigation and timing are being taken for granted.

The location information that GPS gives us is now at the heart of our transportation capabilities, distribution industries, just-in-time manufacturing, emergency service operations, not to mention mining, road-building, and farming.

March 17, 2010

Russia to Put 8 CDMA Signals on 4 GLONASS Frequencies

[Corrected March 20] Russia is “close to completion” of a coordination plan for the “whole set of GLONASS signals” that will include eight different CDMA signals on four frequencies, according to Prof. Grigoriy Stupak, deputy director general of the Russian Institute of Space Device Engineering (RISDE) and the general designer for the GLONASS system.

October 26, 2010 - October 28, 2010
Taipei, Taiwan
Jammer Dectector
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