[aprssig] Terrestrial Threat to GPS Has Now Hit The MainstreamMedia.

[Earl Needham]

So if I read this correctly, EVERYBODY uses L1 -- which Lightsquared has a
huge potential to interfere with.  And it appears my original statement may
-- Ummmm -- be accurate.

"Yeah, but THIS time they're gonna affect a whole lot more than a couple
hundred thousand hams -- they're gonna royally foul up the military (in the
US), the new GPS approaches at many airports, hikers using GPS, and us.  Oh,
and of course, all those owners of cars with moving-map displays fed by a
GPSr.  I suspect the fan is about to get hit."

Vy 7 3
Earl
KD5XB


On Sun, Apr 10, 2011 at 9:51 AM, Glenn Little WB4UIV <
glennmaillist at bellsouth.net> wrote:

>  In the case of the original GPS design, two frequencies are utilized; one
> at 1575.42 MHz <http://en.wikipedia.org/wiki/MHz> (10.23 MHz × 154) called
> L1; and a second at 1227.60 MHz (10.23 MHz × 120), called L2.
>
> L1 is used by civilian GPS units.
> L2 is used by military in addition to L1.
> L2 can also be used by some civilian GPS units in addition to the L1
> signal.
>
> There are five channels on the most modern GPS birds.
>
> See  http://en.wikipedia.org/wiki/GPS_signals  for their utilization and
> additional information.
>
> 73
> Glenn
> WB4UIV
>
>
>
>
> At 08:36 AM 4/10/2011, you wrote:
>
> No, I had no idea.  How about giving us a rundown on just what frequencies
> each listens for?
>
> 7 3
> Earl
>
> On Sat, Apr 9, 2011 at 9:12 PM, Rahn Abbott <whiskey7doa at gmail.com> wrote:
>  Ummmm, you do know that that US Military GPS units and your Garmin Etrex
> are not listening to the same radio signals right? You do know military and
> US government GPS runs on a completely different system?
>  -----Original Message-----
> From: aprssig-bounces at tapr.org [ mailto:aprssig-bounces at tapr.org<aprssig-bounces at tapr.org>]
> On Behalf Of Earl Needham
> Sent: Saturday, April 09, 2011 2:16 PM
> To: TAPR APRS Mailing List
> Subject: Re: [aprssig] Terrestrial Threat to GPS Has Now Hit The
> MainstreamMedia.
>
>  Yeah, but THIS time they're gonna affect a whole lot more than a couple
> hundred thousand hams -- they're gonna royally foul up the military (in the
> US), the new GPS approaches at many airports, hikers using GPS, and us.  Oh,
> and of course, all those owners of cars with moving-map displays fed by a
> GPSr.  I suspect the fan is about to get hit.
>
> Vy 7 3
> Earl
> KD5XB
>
> On Thu, Apr 7, 2011 at 6:28 PM, Steve Noskowicz <noskosteve at yahoo.com>
> wrote:
>
> I don't know if any of these tell, but at least one manufacturer presented
> data to the FCC showing this interference capability and they ignored it and
> went forward.  I'll see if I can find that one agan.
>
> The term I used was: Infinitesimal wisdom.
>
> BPL. this, then the 440 band...  I guess you just follow the money.
> --
>  73, Steve, K9DCI
>
>
>
> --- On Thu, 4/7/11, John L. Wilson <jwilson at ncfcomm.com> wrote:
>
> > Date: Thursday, April 7, 2011, 7:35 AM
>
> > I found this article today.  It
> > includes a video describing the issue and
> > has links to other sources of information.
> >
> > http://www.lightreading.com/document.asp?doc_id=206519&#msgs
> >
> > Monty Wilson, NR0A
> > jwilson at ncfcomm.com
> > -----Original Message-----
> > From: aprssig-bounces at tapr.org
> > [ mailto:aprssig-bounces at tapr.org <aprssig-bounces at tapr.org>]
> > On Behalf
> > Of Stephen H. Smith
> > Sent: Thursday, April 07, 2011 4:30 AM
> > To: TAPR APRS Mailing List
> > Subject: [aprssig] Terrestrial Threat to GPS Has Now Hit
> > The Mainstream
> > Media.
> >
> > News of the terrestrial wireless broadband network that
> > threatens to
> > overload and block GPS receivers, that I posted about
> > around a month ago has
> > now hit the mainstream media.
>
>
>
> -----
>
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