[time-nuts] GPS interference and history...

Mark Spencer mspencer12345 at yahoo.ca
Thu Jun 9 21:26:49 UTC 2011


 I would expect Lightsquared would attempt to acquire space on existing towers 
rather than build their own but I have no insight into what Lightsquared is 
planning to do.  The US has a relatively mature tower industry that caters to 
cellular type providers. .    




----- Original Message ----
From: Jason Rabel <jason at extremeoverclocking.com>
To: time-nuts at febo.com
Sent: Thu, June 9, 2011 2:18:01 PM
Subject: Re: [time-nuts] GPS interference and history...

So back to my original question (I didn't mean to spark such a debate)...

These 40,000 transmitter towers... Are they merely talking about attaching their 
antennas on existing cell towers or totally new
deployment?


FWIW, perhaps there wouldn't be as much of a fiasco if every other navigation 
and timing technology didn't get phased out in favor
of GPS... There literally is no backup sans a fold-out map or sun-dial... To say 
it is 'key' or 'critical' is an understatement.

Likewise, I don't like the idea of existing L1 devices becoming scrap to merely 
support someone's cell phone / broadband addiction.
There's too much hardware out there to make replacement impractical short of a 
decade long transition period. Even then during that
transition period lord only knows how many millions (billions?) of dollars it 
will cost to replace / retrofit existing hardware.
Who's going to pay for all that?

If I can put a $5 filter on my incoming antenna line to make it reduce most 
interference from L^2 and I loose maybe one satellite
out of eight visible, I'll be content with that... If I have to put a $100 
filter to pray I can get signal for an hour a day...
Well... L^2 is going to have mysterious constant hardware failures in this area.




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