http://www.gpsworld.com/gnss-system/news/data-shows-disastrous-gps-jamming-fcc-approved-broadcaster-11029

Data Shows Disastrous GPS Jamming from FCC-Approved Broadcaster
February 1, 2011

Representatives of the GPS industry presented to members of
the Federal Communications Commission clear, strong laboratory
evidence of interference with the GPS signal by a proposed new
broadcaster on January 19 of this year. The teleconference and
subsequent written results of the testing apparently did not
dissuade FCC International Bureau Chief Mindel De La Torre from
authorizing Lightsquared to proceed with ancillary terrestrial
component operations, installing up to 40,000 high-power
transmitters close to the GPS frequency, across the United
States.
The document describing the testing states that the Lightsquared
initiative "will have a severe impact on the GPS band" and
?will create a disastrous interference problem for GPS receiver
operation to the point where GPS receivers will cease to
operate (complete loss of fix) when in the vicinity of these
transmitters.?

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