[gps-talkusers] Re: still working on airplanes?

  • From: "Peter Scialli" <shrink99@xxxxxxxxxxx>
  • To: <gps-talkusers@xxxxxxxxxxxxx>
  • Date: Tue, 09 May 2006 12:19:15 -0400

Andy,
A pilot once explained to me that the main concern is the fact that the antennas used by the equipment are just beneath the skin of the aircraft in various spots. He also told me that the likelyhood of any actual interference from consumer radio receivers is tiny, but strictly speaking is a valid concern. A related concern is that cables that carry radio signals and data run just above and below the passenger cabin, essentially in the same RF field as the cabin itself. The cables are insulated, but leakage is, at least, theoretically possible. This pilot also admitted that even with significant interference, there would be relatively little problem during level flight. Take off and landing would be the time that a pilot might have to rely heavily on avionics as opposed to simply flying the plane straight.

Peter
----- Original Message ----- From: "Baracco, Andrew W" <Andrew.Baracco@xxxxxx>
To: <gps-talkusers@xxxxxxxxxxxxx>
Sent: Tuesday, May 09, 2006 11:44 AM
Subject: [gps-talkusers] Re: still working on airplanes?


Hi Peggy,

Actually, receivers do send a weak reference signal as part of the
process of ocking onto the proper frequency.  This is a very weak
signal, and I wouldn't think it would interfere with anything, but I was
told by someone who knows a lot about avionics, that, believe it or not,
the radio navagation systems on airplanes are not shielded from
extraneous RF signals.  That really surprised me when I heard it, and I
wonder if it is still true after 9/11.

Andy


-----Original Message-----
From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Peggy Kern
Sent: Monday, May 08, 2006 7:26 PM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] Re: still working on airplanes?

You know, this talk of the GPS on airplanes reminds me of my last trip
to Portland on Southwest.  I had no intentions of using the GPS on the
plane, preferring to keep the battery ready for use on the ground.  But
during the flight attendants' information about what could and couldn't
be used in flight, they said anything "that sends or receives a signal"
couldn't be used during a flight.  Obviously, a receiver doesn't send,
but it does receive.  I was wondering if the regulations have changed
and people are just going by what they used to be, or if perhaps our
flight attendant misinformed us.  Just curious.

Peggy
http://kernsac.livejournal.com/
----- Original Message -----
From: "Carl Simmons" <carlsimmons@xxxxxxxxxxx>
To: <gps-talkusers@xxxxxxxxxxxxx>
Sent: Monday, May 08, 2006 8:18 AM
Subject: [gps-talkusers] Re: still working on airplanes?


I just completed a business trip to Chicago to San Francisco last
Friday. 
I
had a window seat, using the Holux I acquired satellites as soon as we


were
allowed to turn on the equipment and maintained 5 to 9 satellites
until 
we
had to turn off the equipment prior to landing.  I had no problems
with 
any
functions.

Carl Simmons
carlsimmons@xxxxxxxxxxx

 _____

From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of David
Sent: Monday, May 08, 2006 4:22 AM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] still working on airplanes?

Hi, Despite more sensitive receivers I have had less success in
getting 
the
GPS to work on airplanes lately.  Has anyone else noticed this?
Dave

taxation WITH representation isn't so hot, either!





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