dslreports logo
site
 
    All Forums Hot Topics Gallery
spc

spacer




how-to block ads


Search Topic:
uniqs
9
share rss forum feed


mix

join:2002-03-19
Utica, MI
reply to xenophon

Re: Truth or FUD?

The idea of the GPS industry "using" spectrum is what irks me. GPS receivers are receive only. They are only listening to signals broadcast to them. Apparently listening to signals outside the allotted GPS bands that the GPS satellites broadcast on has some sort of positive effect if you are looking for high accuracy, high precession results from very low power signals coming from orbit. Go figure.



r81984
Fair and Balanced
Premium
join:2001-11-14
Katy, TX
Reviews:
·row44

said by mix:

The idea of the GPS industry "using" spectrum is what irks me. GPS receivers are receive only. They are only listening to signals broadcast to them. Apparently listening to signals outside the allotted GPS bands that the GPS satellites broadcast on has some sort of positive effect if you are looking for high accuracy, high precession results from very low power signals coming from orbit. Go figure.

The laws of physics causes signals from moving satellites to red shift into 25 mhz of the specturm lightsquare will want to use. That is the laws of physics.
GPS receivers will listen for that red shift signals.
If lightsquare trys to use more powerful ground transmitters on those frequencies they will block the red shifted GPS signals and your GPS will not see those satellites.

People use the spectrum not the GPS industry. US tax payers paid for the GPS network over the years since the 70s. We own GPS. Will lightsquared pays us all back for that investment??
--
...brought to you by Carl's Jr.

Ulmo

join:2005-09-22
Aptos, CA
reply to mix

Right. Physics is what the FCC ought to be paying attention to, not two-bit lawyers that want to ignore physics.

As a single-digit-year-old child, I knew that radio transmissions had harmonics above and below them. Also, satellite is a more delicate and technically particular use of radio. For some poop-eating lawyer to come along and say that property lines are black and white with those types of physics realities, is just absurd.