NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Occam's razor
From: Lu Abel
Date: 2014 Mar 21, 12:41 -0700
From: Lu Abel
Date: 2014 Mar 21, 12:41 -0700
How would that work given that major cell carriers use different
modulation systems. Would a pico-cell be required for each
different carrier? Would it be even worse on international
flights? How about data? Last but not least, how would these
pico-cells communicate with their respective networks??
On 3/20/2014 12:31 PM, Tom Sult wrote:
In the link you sent about cell phone use on airplanes. Is this."Airlines that want to allow phone use would need to license bandwidth for equipment called a pico cell, essentially a base station that handles wireless data and calls. Then they would need safety approval from the Federal Aviation Administration as well."
They are talking about a mini "cell tower" on the plane to comm with the ground. Not direct cell phone to ground comm.
Tom SultSent from my iPhone
And last December the FCC proposed allowing the use of cellphones in flight above 10,000 feet on commercial airliners. And the proposed rules would require that the cellphones transmit only at their lowest power level.
So the FCC apparently believes cellphones work from high flying airplanes even when set to the lowest power output.
But, what do they know.
gl
http://www.npr.org/blogs/thetwo-way/2013/12/12/250469596/phone-calls-on-flights-fcc-holds-open-meeting-today
From: Gary LaPook <garylapook---.net>
To: garylapook---.net
Sent: Wednesday, March 19, 2014 1:26 PM
Subject: [NavList] Re: Occam's razor
Remember, the reason that cell phones were banned on airliners had nothing to do with safety of flight, or interference with aircraft systems. The ban came from the FCC, the Federal Communications Commission, not the FAA. The reason was, that from high altitude, the line of sight cell phone transmissions would hit many cell sites, even those far away from the plane, and cause interference with cell phone calls in a very wide radius. If the cell site antennas did not receive signals from planes in flight then there would have been no reason for the FCC's concern.
gl
From: Tom Sult <tsult---.com>
To: garylapook---.net
Sent: Wednesday, March 19, 2014 10:51 AM
Subject: [NavList] Re: Occam's razor
Out of radar range out of cellphone range. Also cell phone towers don't point up. Cell phone reception is poor above 4000 ft AGL.
Tom SultSent from my iPhone
