To: EagleUSA
Anyone that has a subscription to Aviation Week should read the article "LightSquared-GPS Debate Looks To Be A Washington Classic", Aviation Week & Space Technology Jun 27 , 2011 , p. 22. In that article here is just one piece of this NATIONAL SECURITY TREASON that is occurring..........
The GPS community is concerned by the speed with which the FCC approved a waiver to rules requiring terrestrial service to be ancillary to satellite service in the frequencies owned by LightSquared. To go from a primarily satellite-based service to primarily terrestrial-based with ancillary satellite service is an effective reallocation of spectrum and needed to go through the rulemaking process and not a waiver, argues Sturgell. The FCC cited the public benefit from LightSquareds plans to provide nationwide wireless-broadband coverage, but the existing public benefit from over $25 billion in government investment in GPS and over a billion users worldwide should give them pause.
Because the signals transmitted by GPS and other global navigation-satellite systems such as Galileo are extremely weak, they were located in a quiet part of the L-band spectrum and designed to operate in the presence of other, weak satellite signals. The LightSquared waiver is like a re-zoning law, says Bradford Parkinson, emeritus professor at Stanford Universitys Aeronautics and Astronautics Department.
Effectively, the FCC is directing that a quiet-spectrum neighborhood be re-zoned for concert rock bands at the threshold of pain. And LightSquared is suggesting that its current neighbors should simply add more insulation to their houses, he says, pointing out that its terrestrial transmissions will be a billion times more powerful than GPS signals.
Because the power spectrum of a GPS signal is complex and spread over a range of frequencies, applications requiring rapid acquisition and high accuracy, such as aviation, use wide-open receivers that can be overloaded by out-of-band emissions from powerful transmitters in adjacent bands. GPS comes in different flavors, says Parkinson. Some receivers, such as those in cellphones, do not require a great deal of accuracy and are narrowly filtered. But receivers used in aviation, or to measure crustal motion with millimeter accuracy, have wideband receivers looking at adjacent bands, which were relatively quiet.
I have probably posed more than allowed.
9 posted on
09/17/2011 2:15:29 PM PDT by
Cheerio
(Barry Hussein Soetoro-0bama=The Complete Destruction of American Capitalism)
To: Cheerio
Wow! That looks like a good article! Thanks for the info.
10 posted on
09/17/2011 2:36:05 PM PDT by
sheikdetailfeather
("Kick The Communists Out Of Your Govt. And Don't Accept Their Goodies"-Yuri Bezmenov-KGB Defector)
To: Cheerio
12 posted on
09/17/2011 3:20:08 PM PDT by
DManA
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