Group,
Completed circumnavigation of the world via Singapore with a hand-held
Garmin 60 CSx GPS receiver.
Set it to record at 6 minute intervals, and marked waypoints. Used about 6%
of track space with 4 GB micro SD card.
Had no trouble with aircraft interference. Talked to the Captain after a
on frequency.
Robert G8RPi.
--- On Sun, 4/10/09, David I. Emery d...@dieconsulting.com wrote:
From: David I. Emery d...@dieconsulting.com
Subject: Re: [time-nuts] GPS from a window seat
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Date: Sunday, 4 October, 2009, 7:08
for everyday use!
Robert G8RPI.
--- On Sun, 4/10/09, Thomas A. Frank ka2...@cox.net wrote:
From: Thomas A. Frank ka2...@cox.net
Subject: Re: [time-nuts] GPS from a window seat
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Date: Sunday, 4 October, 2009, 9:28 PM
, Keith E. Brandt, WD9GET wd9...@amsat.org wrote:
From: Keith E. Brandt, WD9GET wd9...@amsat.org
Subject: Re: [time-nuts] GPS from a window seat
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Date: Monday, 5 October, 2009, 1:02 AM
See Joe Mehaffey's list of airlines
On Mon, Oct 5, 2009 at 12:15 AM, Robert Atkinson robert8...@yahoo.co.uk wrote:
Hi
There is of course a non technical, non EMC reason for such a ban. Security.
It might
be considered that exact position and speed information could be of use to a
passenger
with ill intent. Note that most
I can only draw on my experience in the past as
an avionics technician and Private PIC.
How about a different perspective on this?
Imagine that I bring aboard a box of rocks for
my entertainment. It may be magnetic, radioactive,
or some such. Now, these rocks could theoretically
influence
-nuts@febo.com
Sent: Saturday, October 3, 2009 1:31:08 AM GMT -07:00 US/Canada Mountain
Subject: Re: [time-nuts] GPS from a window seat
saying angrily using a GPS on a
plane is illegal.
Nonsense...unless their own rules prohibit such use, in which case
you are legally obliged to comply
Why the ban on AM/FM receivers?
I assume it's EMI from the local oscillator.
Is anybody shipping an AM/FM radio that isn't superhet?
--
These are my opinions, not necessarily my employer's. I hate spam.
___
time-nuts mailing list --
On Sun, Oct 04, 2009 at 12:20:26AM -0700, Hal Murray wrote:
Why the ban on AM/FM receivers?
I assume it's EMI from the local oscillator.
Is anybody shipping an AM/FM radio that isn't superhet?
FWIW, I have read and been told that there was an era when some
cheap AM/FM radios put
.
Robert G8RPI MRAeS
--- On Sun, 4/10/09, David I. Emery d...@dieconsulting.com wrote:
From: David I. Emery d...@dieconsulting.com
Subject: Re: [time-nuts] GPS from a window seat
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Date: Sunday, 4 October, 2009, 8:36 AM
On Sun, Oct 04, 2009 at 09:14:29AM +, Robert Atkinson wrote:
Hi,
This is correct. There was also an issue with harmonics from the local
oscillator in the aircraft's own VHF nav/comm receivers blocking the
GPS. The answer is a 1575MHz notch filter, e.g.
On 10/4/09 11:08 AM, David I. Emery d...@dieconsulting.com wrote:
On Sun, Oct 04, 2009 at 09:14:29AM +, Robert Atkinson wrote:
Hi,
This is correct. There was also an issue with harmonics from the local
oscillator in the aircraft's own VHF nav/comm receivers blocking the
GPS. The
I have read that there have been studies with a spectrum
analyzer system on planes that have shown that compliance with the no
radiating device rules and electronics off during takeoff and
landing is
far less than 100% though I certainly would not personally
deliberately
violate the
On 10/4/09 1:06 PM, Bill Hawkins b...@iaxs.net wrote:
Group,
As to interference with other GPS receivers, my son runs a deep-sea fishing
party
boat out of Ocean City, MD. He is famous for knowing where the fish will be.
There
may be 5 to 20 people on a 50' fiberglass boat using GPS
But that doesn't change the fact that if a drunk businessman or a
bored 6 year old with a new toy can stealthily endanger all the
passengers on a plane, the responsibility - and liability - should be
with the aircraft designer.
Bringing it back to the normal topic at hand, I wonder - if
On Sun, Oct 04, 2009 at 03:06:12PM -0500, Bill Hawkins wrote:
See Joe Mehaffey's list of airlines at
http://gpsinformation.net/airgps/airgps.htm
The list of airlines that allow GPS have the caveat that the Captain has the
final decision.
It is interesting that American is listed as
See Joe Mehaffey's list of airlines at
[1]http://gpsinformation.net/airgps/airgps.htm
The list of airlines that allow GPS have the caveat that the Captain has the
final decision.
It is interesting that American is listed as banning them as of
October 2009 (apparently they have switched
time-nuts@febo.com
Sent: Sun, October 4, 2009 2:21:22 PM
Subject: Re: [time-nuts] GPS from a window seat
But that doesn't change the fact that if a drunk businessman or a
bored 6 year old with a new toy can stealthily endanger all the
passengers on a plane, the responsibility - and liability
saying angrily using a GPS on a
plane is illegal.
Nonsense...unless their own rules prohibit such use, in which case
you are legally obliged to comply. There is no blanket (ie:
government) rule against them.
It is up to the airline; in the past year I've flown a number of
different
--- On Fri, 2/10/09, Predrag Dukic stij...@tapko.de wrote:
From: Predrag Dukic stij...@tapko.de
Subject: Re: [time-nuts] GPS from a window seat
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Date: Friday, 2 October, 2009, 6:53 AM
In fact, I think those
Hi Robert,
The limit is 515 m/s, 1000 knots or 1854 km/h. I presume your car did 1227
km/h, right? This is within CoCom limits. Then both altitude AND speed
must be over the limit to break the rules. Where your car also driving
over 18000m altitude?
of the start/turnaround team
that ran the car in Jordan and Blackrock Nevada.
Robert G8RPI.
--- On Fri, 2/10/09, b...@lysator.liu.se b...@lysator.liu.se wrote:
From: b...@lysator.liu.se b...@lysator.liu.se
Subject: Re: [time-nuts] GPS from a window seat
To: Discussion of precise time
On 10/1/09 11:49 PM, Robert Atkinson robert8...@yahoo.co.uk wrote:
Well Jim brought up cars,
I did look at using a GPS as a speed sensor for a car some time ago. The
1000kPH limit (and 1s update rate) stopped that idea. The car finally hit over
1227kph average. We used wheel speed and
Hi Bill,
I've done this a few times, with mixed success, using an AMOD AGL3080 GPS
data logger. I managed to capture an entire flight from HKG to SFO. That
was from a South facing window seat. One thing to watch out for is getting
a good solid lock on the ground (e.g. in the boarding lounge)
Group,
I'll be flying around the world from Minnesota, USA, to Kuala Lumpur,
Malaysia, to give a talk on industrial process control.
Bought a Garmin 60CSx handheld GPS so I could tell precisely when I
crossed the date line (a man's gotta have some goal in life).
Is this feasible? Can you see
Bill,
GPS definitely works through a commercial aircraft window.
You have to hold the unit, or at least the antenna, close to the window.
Some airlines, however, prohibit GPS use during flight.
Check with your airline.
Steve Gunsel
At 09:21 AM 10/1/2009, you wrote:
Group,
I'll be flying
Check the specs on your GPS... many consumer GPS units will not work at
airplane velocities/altitudes. GPS manufacturers don't want you using a non
aviation certified unit for airplane navigation (plus they get big bucks for
the aviation units).
Hello Bill,
Group,
I'll be flying around the world from Minnesota, USA, to Kuala Lumpur,
Malaysia, to give a talk on industrial process control.
Bought a Garmin 60CSx handheld GPS so I could tell precisely when I
crossed the date line (a man's gotta have some goal in life).
Is this
On 10/1/09 6:56 AM, Pieter ten Pierick time-nuts-m...@tenpierick.com
wrote:
Hello Bill,
, to
be able to geotag my photos (And because it was fun ;-) ).
And isn't that why we do this stuff?
___
time-nuts mailing list -- time-nuts@febo.com
To
Lux, Jim (337C) wrote:
On 10/1/09 6:56 AM, Pieter ten Pierick time-nuts-m...@tenpierick.com
wrote:
Hello Bill,
, to
be able to geotag my photos (And because it was fun ;-) ).
And isn't that why we do this stuff?
Some of us is mostly time-nuts, pos/nav-nuts and maybe just a little
I've done this with two separate GPS units. One was a basic unit with
no maps - more designed for bushwalking, boating and other direct
navigation. It worked really well.
Just recently (a few days ago) flying to Perth I used my car-designed
Navman. It locked easily and I chuckled as it rapidly
Jim,
Jim Palfreyman wrote:
I've done this with two separate GPS units. One was a basic unit with
no maps - more designed for bushwalking, boating and other direct
navigation. It worked really well.
Mmm. Bushwalking is one of your local specialities I gather...
Just recently (a few days ago)
:46 PM
Subject: Re: [time-nuts] GPS from a window seat
I've done this with two separate GPS units. One was a basic unit with
no maps - more designed for bushwalking, boating and other direct
navigation. It worked really well.
Just recently (a few days ago) flying to Perth I used my car-designed
overspeed alarm Ideal to stay
discreet...
Jean-Louis Oneto
France
- Original Message - From: Jim Palfreyman jim77...@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Thursday, October 01, 2009 3:46 PM
Subject: Re: [time-nuts] GPS from
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Thursday, October 01, 2009 3:46 PM
Subject: Re: [time-nuts] GPS from a window seat
I've done this with two separate GPS units. One was a basic unit with
no maps - more designed for bushwalking, boating and other direct
Check the specs on your GPS... many consumer GPS units will not work at
airplane velocities/altitudes. GPS manufacturers don't want you using a
non aviation certified unit for airplane navigation (plus they get big
bucks for the aviation units).
The limitations implemented is either
...@lysator.liu.se b...@lysator.liu.se wrote:
From: b...@lysator.liu.se b...@lysator.liu.se
Subject: Re: [time-nuts] GPS from a window seat
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Date: Thursday, 1 October, 2009, 8:27 PM
Check the specs on your GPS... many
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Robert Atkinson
Sent: Thursday, October 01, 2009 1:44 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS from a window seat
Hi,
Apart from
Lux, Jim (337C) wrote:
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Robert Atkinson
Sent: Thursday, October 01, 2009 1:44 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS from a window seat
In order to fake out some Garmin units, when using them via splitters on
a external antenna, we put 220 ohm resistors from the center of the coax
to the sheild. The splitters we used were capacitive coupled and this
work fine for the Garmins.
The Garmin units needed to see some sort of DC
resistor, some models needed 220 Ohms.
John WA4WDL
--
From: Brian Kirby kilodelta4foxm...@gmail.com
Sent: Thursday, October 01, 2009 7:57 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] GPS
jmfranke wrote:
I used a bias tee with a capacitor block. I varied the resistor until I
could see signals coming from the external antenna, the built in patch
was shielded with aluminum foil and the receiver verified that no
signals were coming from the internal antenna. Some receivers
Magnus Danielson wrote:
jmfranke wrote:
I used a bias tee with a capacitor block. I varied the resistor
until I could see signals coming from the external antenna, the built
in patch was shielded with aluminum foil and the receiver verified
that no signals were coming from the internal
Bruce,
Bruce Griffiths wrote:
Magnus Danielson wrote:
jmfranke wrote:
I used a bias tee with a capacitor block. I varied the resistor
until I could see signals coming from the external antenna, the built
in patch was shielded with aluminum foil and the receiver verified
that no signals were
On Thu, Oct 01, 2009 at 08:21:28AM -0500, Bill Hawkins wrote:
Group,
I'll be flying around the world from Minnesota, USA, to Kuala Lumpur,
Malaysia, to give a talk on industrial process control.
Bought a Garmin 60CSx handheld GPS so I could tell precisely when I
crossed the date line (a
Hi Bruce,
but at first resonance (self resonance) the inductor has the highest
impedance that it will ever have (theoretically infinite impedance), which is
what you want in a bias-t...
bye,
Said
In a message dated 10/1/2009 19:56:03 Pacific Daylight Time,
bruce.griffi...@xtra.co.nz
saidj...@aol.com wrote:
Hi Bruce,
but at first resonance (self resonance) the inductor has the highest
impedance that it will ever have (theoretically infinite impedance), which is
what you want in a bias-t...
bye,
Said
In a message dated 10/1/2009 19:56:03 Pacific
That's only a small issue in my opinion.
I've designed broadband systems that run at ~50% to 150% of self resonant
frequency, and it works quite well if you put a 50 - 220 Ohm resistor in
series with the inductor as the other member noted.
It works well because it basically is a
In fact, I think those limitations come from DoD.
(to insure GPS cannot be used for some home made missile)
At 21:27 1.10.2009, you wrote:
Check the specs on your GPS... many consumer GPS units will not work at
airplane velocities/altitudes. GPS manufacturers don't want you
needed 220 Ohms.
John WA4WDL
--
From: Brian Kirby kilodelta4foxm...@gmail.com
Sent: Thursday, October 01, 2009 7:57 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] GPS from a window seat
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