[aprssig] wifi and aprs?

Joe Della Barba joe at dellabarba.com
Thu Jan 13 05:07:00 EST 2005


I think trying to use wifi from an airplane would not work. You would never 
stay in range long enough to set up a connection.
BTW, mag mount antennas don't stick very well to aluminum :)
73
Joe Della Barba
N3HGB
maritime mobile
airmobile
----- Original Message ----- 
From: "A.J. Farmer (AJ3U)" <ajfarmer at spenet.com>
To: "'TAPR APRS Mailing List'" <aprssig at lists.tapr.org>
Sent: Wednesday, January 12, 2005 11:55 PM
Subject: RE: [aprssig] wifi and aprs?


> Interesting idea.  I think you would be surprised at the number of AP's 
> you
> can pick up once you get up in the air.
>
> You might look at some of these mobile antennas:
>
> http://www.jefatech.com/category/antennas.mobile/
>
> Might be worth a try.  The magnets in them are pretty strong although I
> don't know if they would hold on at 100+ MPH.  It will at least get your
> antenna outside of the aircraft so you have a better chance.
>
> You also might consider a high powered WiFi card which will increase your
> range:
>
> http://www.jefatech.com/product/2511CDPLUSEXT2
>
> You can also set up a high gain omni outside for the access point that is 
> on
> the ground:
>
> http://www.jefatech.com/category/antennas.omnidirectional/
>
> Or even these which are simple and easy to install:
>
> http://www.jefatech.com/product/IN245RD
>
> JEFA Tech supports the ARRL HSMM (High Speed Multimedia) Group which does
> this kind of experimenting with WiFi.  There are a lot of Amateurs out 
> there
> with WiFi projects.  You can use the code HSMM during the checkout to get 
> a
> 10% discount.
>
> Good luck!
>
> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org 
> [mailto:aprssig-bounces at lists.tapr.org]
> On Behalf Of Wes Johnston
> Sent: Wednesday, January 12, 2005 11:29 PM
> To: aprssig at lists.tapr.org
> Subject: [aprssig] wifi and aprs?
>
> Has anyone ever used 802.11b/g from an air plane?  I mean small plane....
> not
> commercial.  I'm wondering about downlinking data collected from Garmin 
> RINO
> units and APRS trackers via 802.11.  Would be neat to use a webcam too.
>
> What range can we expect?  What antennas were used?  Anyone thought about
> automatic antenna aiming using APRS position reports of the plane?
>
> Is this a "you're in range for 20 seconds thing, or is this something we
> could
> aim a 15 db yagi out the passenger compartment window (ie down the wing,
> perpendicular to the plane's travel) and pivot about a fixed point to keep
> the
> yagi aimed at the wifi AP?
>
> Wes
>
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