The rules are in effect to prevent possible interference to the aircraft navigation aids and communications equipment. The potential for mix produces from numerous consumer grade electronic devices emitting part 15 compliant RF is just to unpredictable for the FAA to allow these possible RF sources to be energized during the landing and take off phase of flight. If the interference were to occur at a higher flight level, the pilot has longer to respond and get the interfering emitter shut down. During landing and take off the reaction time is just too long to allow the devices to be turned on.
It is not a matter of general EMI. It is a matter of mix products from unknown emitters causing on channel interference to sensitive receivers.
73 Glenn WB4UIV ARRL Technical Specialist
At 01:28 PM 5/21/2011, Art McBride wrote:
So what happens to this airplane when it flies near a FM or TV broadcast station? FAA rules call for EMI testing using 1 amp RF currents in wire bundles in the aircraft.
This Cell Phone / computer/electronic interference from consumer electronics is a compilation of half truths, myths and deception. A shameful compilation of rules designed to intimidate from an origination that should be scientific in nature, and totally understand electromagnetic radiation. Maybe it is the "Federal" part in the FAA name that explains this behavior!
Art, KC6UQH
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of George Henry Sent: Friday, May 20, 2011 2:35 PM To: AMSAT Subject: [amsat-bb] Re: In-flight iPhone snaps Space Shuttle launch
And what was her iPhone doing turned on during approach? Still a no-no on all commercial carriers, AFAIK...
George, KA3HSW
----- Original Message ----
From: Clint Bradford clintbradford@mac.com To: AMSAT BB amsat-bb@amsat.org Sent: Fri, May 20, 2011 2:20:44 PM Subject: [amsat-bb] In-flight iPhone snaps Space Shuttle launch
The story behind the photo taken of the Space Shuttle from an in-flight passenger jet. Stefanie Gordon shot the image of Endeavour's launch with
her
iPhone as her plane descended for a landing.
http://www.tuaw.com/2011/05/17/in-flight-iphone-snaps-space-shuttle-launch/
Clint Bradford clintbradford@mac.com
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
__________ Information from ESET NOD32 Antivirus, version of virus signature database 6136 (20110519) __________
The message was checked by ESET NOD32 Antivirus.
__________ Information from ESET NOD32 Antivirus, version of virus signature database 6136 (20110519) __________
The message was checked by ESET NOD32 Antivirus.
__________ Information from ESET NOD32 Antivirus, version of virus signature database 6140 (20110521) __________
The message was checked by ESET NOD32 Antivirus.
__________ Information from ESET NOD32 Antivirus, version of virus signature database 6141 (20110521) __________
The message was checked by ESET NOD32 Antivirus.
__________ Information from ESET NOD32 Antivirus, version of virus signature database 6141 (20110521) __________
The message was checked by ESET NOD32 Antivirus.
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb