Boeing to Offer Cell Phone Service in Airplanes Next Year | |
Anonymous Coward 12/08/2005 10:14 AM Report Abusive Post Report Copyright Violation | |
Sammie 12/08/2005 10:14 AM Report Abusive Post Report Copyright Violation | |
Anonymous Coward 12/08/2005 10:14 AM Report Abusive Post Report Copyright Violation | |
Anonymous Coward 12/08/2005 10:14 AM Report Abusive Post Report Copyright Violation | |
Omega 12/08/2005 10:14 AM Report Abusive Post Report Copyright Violation | Omega on a previous post I made on this forum: It is not possible to make a cell phone call at this altitude and speed, especially over rural PA, where there is limited coverage, for the following reason. When you make a cell phone call it interrogates the master tower, to establish the service provider and to establish hand off control. (in other words simple triangulation is done after "handshake" and the tower prepares to hand the call to the next tower when you are out of range.) Cells phone towers are line of sight tower to tower. They cannot receive a signal from 30,000 feet. Not enough wattage from the transmitter (the cell phone) even if the antenna was pointed straight up. This does not even take into consideration the inherent problems with making a cell phone call from within a plane (the emi/rfi from the nav and comm systems/ fuselage of the aircraft itself). In addition, at 500 knots it would not be possible to establish comms with the master tower, because at that speed you would very likely become out of range for that tower before comms could be established. In other words no initial uplink is established. I have made cell phone calls from planes at less than 5000 feet in urban areas, but they quickly fade out as you increase altitude. I believe there is a site up somewhere with more specifics. Links anyone? |
Anonymous Coward 12/08/2005 10:14 AM Report Abusive Post Report Copyright Violation | |
Anonymous Coward 12/08/2005 10:14 AM Report Abusive Post Report Copyright Violation | |