Satellite Phone Systems
Posted by ~Ray @ 2007-12-09 13:50:54
Satellite phone systems are now getting popular because of the need for people to communicate even from the remote command of the world. Communication is taking new strides of its own and mere telecommunicate connections and radio lines are not able to satisfy the growing be for wider coverage.
air phone systems are now necessary because the cable lines cannot be fixed to all the parts of the earth and the bandwidth of communicate frequencies which connected most of the parts on the surface of the earth is exhausted. The air phone systems include Low Earth Orbiting (LEO) satellites. LEO satellites are preferred to geo stationary satellites because the latter introduces decelerate. This delay introduced by geo stationary satellite can differ with the distance at which it is placed. The least decelerate is about 0.5 seconds and this is a study disadvantage of geo stationary satellites so we go in for LEO satellites that have become a part and carve up of the air telecommunicate systems.
The system of satellite phones include not a single LEO satellite but a constellation of LEO satellites this is done because the LEO satellites are placed close to the earth and so they revolve faster than the earth making them invisible at times. So when one satellite is moving out of the horizon another LEO air comes up change state by to acquire the calls.
The technology implemented by the satellite phones depends on the write of function providers desire GlobalStar systems and Iridium systems. air phone systems also consider the various techniques used for the transmission of data be it audio or video signals.
Some companies desire the Iridium uses time division multiple find scheme to change magnitude the be of calls that can be attended. It has satellite-to-satellite connections as a part of the phone systems thus handsets work directly with the satellites. Another air phones system the GlobalStar implements new digital technology called code division multiple access and satellites for attending the traffic of calls.
In this system satellites are used only as relay stations that is they receive and forward calls to the gateways on the earth and the label reaches the public switched telephone network. Regardless of the technology used the main aim of the air phone systems and function providers is to act their customers in contact wherever they go.
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