Satellite navigation systems

July 7, 2011 - 10:10am

Possibly recognizing that the July 1 final report on GPS testing showed that interference was worse than predicted, LightSquared lawyers are now bypassing the FCC and submitting technical papers directly to the UN’s International Telecommunications Union (ITU) in Geneva, according to published reports.

June 30, 2011 - 9:47am

With fresh evidence that LightSquared’s proposed wireless broadband network will cause widespread interference to GPS signal reception, principals of the industry Coalition to Save Our GPS went on the offensive today in a media conference call.

June 30, 2011 - 3:10am

The ongoing controversy about whether LightSquared’s proposed network of 40,000 powerful ground-based stations transmitting high-speed Internet across the nation would interfere with adjacent GPS frequencies became more intense last month.

June 28, 2011 - 11:22am

Following extensive reports of GPS interference, LightSquared announced last week that it would vacate its L-Band frequency adjacent to GPS and move to one further away to greatly reduce, but not eliminate, interference with satnav signals.

June 26, 2011 - 6:48am

A study released by the Save Our GPS Coalition warns of “serious repercussions for the U.S. economy” if LightSquared is allowed to broadcast 4G broadband signals that cause interference with GPS. According to the study, more than 3.3 million U.S.

June 21, 2011 - 7:04am

It is only in the past few of years that GPS approaches, pioneered in Alaska in the 1990s, have started to become available. These form another element of a future, efficient system where aircraft are managed in time as well as space, take efficient paths and don’t waste burning fuel in unnecessary holds.

June 21, 2011 - 5:35am

Since early reports indicate that LightSquared’s transmitters do, in fact, interfere with GPS signals, LightSquared yesterday announced that it would vacate the frequency that caused major GPS interference and move to one farther away, where tests had shown minimum interference. However, some GPS receivers would still be affected by the company’s 4G signals even in this frequency band.

June 14, 2011 - 10:20am

In accordance with the Federal Communication Commission’s January ruling, LightSquared must, in its June 15 final report on GPS compatibility tests, show that “it is clear that potential GPS interference concerns have been resolved.” But hold that applause, GPS users.

June 9, 2011 - 11:30am

“The test data discussed today makes clear that there is substantial interference to GPS if LightSquared turns on high-powered terrestrial facilities in the spectrum next door to GPS,” Trimble vice president and general counsel Jim Kirkland said today at an event sponsored by the National Space-Based PNT Advisory Board. Kirkland is also a founding member of the Coalition to Save Our GPS.

June 7, 2011 - 10:15am

The controversy over potential interference to GPS from LightSquared’s planned nationwide network of powerful 4G broadband retransmitting stations has now drawn Congress into the dispute. Letters expressing concern about adverse effects of the LightSquared network on GPS have been sent to the FCC by House and Senate members.

 
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