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 4
aruta AA8K
Subject: Re: [time-nuts] GPS from a window seat
To: "Discussion of precise time and frequency measurement"
Date: Monday, 5 October, 2009, 9:13 PM
I can only draw on my experience in the past as
an avionics technician and Private PIC.
How about a different perspective on t
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
influenc
On Mon, Oct 5, 2009 at 12:15 AM, Robert Atkinson 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 airlines turn of the
, Keith E. Brandt, WD9GET wrote:
From: Keith E. Brandt, WD9GET
Subject: Re: [time-nuts] GPS from a window seat
To: "Discussion of precise time and frequency measurement"
Date: Monday, 5 October, 2009, 1:02 AM
See Joe Mehaffey's list of airlines at
[1]http://gpsinformation.net/ai
sider for everyday use!
Robert G8RPI.
--- On Sun, 4/10/09, Thomas A. Frank wrote:
From: Thomas A. Frank
Subject: Re: [time-nuts] GPS from a window seat
To: "Discussion of precise time and frequency measurement"
Date: Sunday, 4 October, 2009, 9:28 PM
> I have read th
nna
or filter to keep them on frequency.
Robert G8RPi.
--- On Sun, 4/10/09, David I. Emery wrote:
From: David I. Emery
Subject: Re: [time-nuts] GPS from a window seat
To: "Discussion of precise time and frequency measurement"
Date: Sunday, 4 October, 2009, 7:08 PM
On Sun,
ent
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
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 bac
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 a
>
> 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 wonde
On 10/4/09 1:06 PM, "Bill Hawkins" 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 units to
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 l
Group,
This has been a most enlightening discussion. Thank you all for
participating.
Finally found the right words to use with Google (ban gps flight) to get a
list.
See Joe Mehaffey's list of airlines at
http://gpsinformation.net/airgps/airgps.htm
The list of airlines that allow GPS have the ca
On 10/4/09 11:08 AM, "David I. Emery" 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 answer is a 15
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.
> http://www.edmo.com/index.php?m
vionics design is my day job.
Robert G8RPI MRAeS
--- On Sun, 4/10/09, David I. Emery wrote:
From: David I. Emery
Subject: Re: [time-nuts] GPS from a window seat
To: "Discussion of precise time and frequency measurement"
Date: Sunday, 4 October, 2009, 8:36 AM
On Sun, Oct 04, 2009
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 radio
> 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 -- time-nuts
e and frequency measurement"
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
yo
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
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) be
On 10/1/09 11:49 PM, "Robert Atkinson" 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 pitot pressure in th
part 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 wrote:
From: b...@lysator.liu.se
Subject: Re: [time-nuts] GPS from a window seat
To: "Discussion of precise time and frequency measurement"
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?
http://trl.trimble.com/docushare/dsweb/Get/Doc
8RPI
--- On Fri, 2/10/09, Predrag Dukic wrote:
From: Predrag Dukic
Subject: Re: [time-nuts] GPS from a window seat
To: "Discussion of precise time and frequency measurement"
Date: Friday, 2 October, 2009, 6:53 AM
In fact, I think those limitations come from DoD.
(to insure
a 10K
> resistor, some models needed 220 Ohms.
>
> John WA4WDL
>
> --
> From: "Brian Kirby"
> Sent: Thursday, October 01, 2009 7:57 PM
> To: "Discussion of precise time and frequency measurement"
>
> S
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 u
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 single-pole
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 Paci
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 w
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 lin
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 c
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 intern
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 needed
resistor, some models needed 220 Ohms.
John WA4WDL
--
From: "Brian Kirby"
Sent: Thursday, October 01, 2009 7:57 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 loa
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
> -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 w
09, b...@lysator.liu.se wrote:
From: b...@lysator.liu.se
Subject: Re: [time-nuts] GPS from a window seat
To: "Discussion of precise time and frequency measurement"
Date: Thursday, 1 October, 2009, 8:27 PM
> Check the specs on your GPS... many consumer GPS units will not work at
>
> 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
sion of precise time and frequency measurement"
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
navigati
Ideal to stay
> discreet...
> Jean-Louis Oneto
> France
>
> - Original Message - From: "Jim Palfreyman"
> To: "Discussion of precise time and frequency measurement"
>
> Sent: Thursday, October 01, 2009 3:46 PM
> Subject: Re: [time-nuts] GPS fro
ject: 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
Navma
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)
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 swe
Lux, Jim (337C) wrote:
On 10/1/09 6:56 AM, "Pieter ten Pierick"
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
photo-nuts. ;)
But mostly, I
On 10/1/09 6:56 AM, "Pieter ten Pierick"
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 unsubscribe, go to https://w
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 th
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).
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 aro
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 eno
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