GPS signals

February 7, 2008 - 10:12am

Loran will continue, and be modernized, according to the recently released U.S. Fiscal Year 2009 budget. Furthermore, system responsibility will be placed with the National Protection and Programs Directorate of the Department of Homeland Security, which has chosen it as the backup for national infrastructure elements that currently depend on GPS.

February 7, 2008 - 10:12am

Loran will continue, and be modernized, according to the recently released U.S. Fiscal Year 2009 budget. Furthermore, system responsibility will be placed with the National Protection and Programs Directorate of the Department of Homeland Security, which has chosen it as the backup for national infrastructure elements that currently depend on GPS.

December 18, 2007 - 7:47am

It took several years for the U.S. and the European Union to reach agreement about satellite navigation systems, but the cooperation agreement the parties signed in June that paves the way for the Galileo and GPS satellite navigation systems should be beneficial to both sides, and to aviation worldwide.

October 9, 2007 - 12:34pm

In 1997 the President’s Commission on Critical Infrastructure Protection, which was charged with examining threats to our national security, recommended an assessment be made of the vulnerability of the U.S. transportation infrastructure if it had to rely on GPS.

October 9, 2007 - 7:33am

As part of its evaluation of loran as a potential backup to GPS, the FAA has contracted Rock-well Collins to build a combined GPS/loran variant of its standard multimode navigation and landing receiver. The unit’s primary function will be to provide GPS navigation, with automatic switchover to loran should GPS signals be lost or degraded, and automatic reversion to GPS when normal service resumes.

August 24, 2007 - 10:46am

The DOD’s Navstar GPS reached a new performance level this year, with 30 satellites in orbit versus its minimum required civil complement of 24. Four more satellites add signal coverage and reduce the number of occasional “holes,” or gaps where fix geometry can sometimes fall below navigation standards.

June 5, 2007 - 7:01am
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A solar flare 10 times stronger than anything researchers had previously observed or predicted surprised scientists last December, not only because of its size and strength, but because of the effect it had on GPS receivers and other communications systems. Now scientists are looking at previous data and trying to understand how these flares affect satellite signals, in the hope that they can one day prevent further disruptions.

March 23, 2007 - 12:33pm

Boeing has formed an international industry team to compete for the contract to build and deploy the next generation of GPS satellites.

The Air Force plans to award the contract in early 2006 for the new GPS III satellites that will replace the ones currently in orbit and those scheduled for launch between now and when the GPS III satellites are ready.

February 5, 2007 - 5:42am

The French civil aviation authority, DGAC, has published the first GNSS nonprecision approach procedure for a French airport and is working toward introducing approaches with vertical guidance (APVs) once the necessary augmentation of the GPS signals is available and the relevant ICAO design criteria become effective.

November 9, 2006 - 5:40am

GPS Satellite SVN-15 will celebrate its 16th birthday in space this month, and by next spring it will have circled the earth 12,000 times (roughly twice a day), continuously transmitting navigation signals to us. That’s amazing performance, especially considering that its original orbital life was expected to be 7.5 years.

 
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