Satellite-based cellular systems
In addition to the terrestrial systems, in recent years satellite-based telephone systems have been under construction. With such a system it is possible to make a connection with a cellular phone all around the world, especially in those regions currently not covered by a terrestrial system. In contrast with other satellite communication systems, satellite-based phone systems operate in the Low Earth Orbit (780 km high), and are therefore called LEO systems. The satellites work differently from those at a much higher orbit (36,000 km) in two major ways. First, the small distance between earth and satellite makes it possible to connect to the system with a handheld device. Second, signals can be moved overhead in between satellites without the use of base stations on the earth. In the near future, operators will supply services in which terrestrial and satellite communication are integrated.
Like in the terrestrial systems, the satellites operate on certain frequencies, that have to be selected in such a way that interference is avoided. Not only frequencies are needed to communicate with handheld devices, but also to establish communication between satellites and ground stations, and between satellites mutually.
cellular telecommunication networks
One of the most recent applications of wireless communication is the establishment of fixed cellular telecommunication networks. In contrast to mobile cellular networks, in non-mobile or fixed systems both the transmitters and receivers are located at fixed points in the area. Fixed cellular networks provide a financially attractive alternative to the construction of conventional wired networks in developing countries, where no
yes satellite is between moon and earth. moon can see a satellite only for ten hours in a day
Photosynthesis encourages cellular restoration.
The difference between an artificial satellite and a natural satellite is on how they are made. Electronic Satellites that are made by man launched into space are Artificical Satellites, while the Moon which is not artificially made are called Natural Satellites.
no
Where conventional engineers (chemical, mechanical, etc.) Will work with physical objects, soft ware engineers work with software.
The sport satellite tansmits sport :)
comparison between Airbus380 & Airbus300
Islam forbids the charging and paying of interest, so many Islamic banks use some sort of fudge to get around 'interest'.
The difference between conventional and non conventional energy resources is that conventional energy resources are much more common. An example of a conventional energy resource would be oil, a non conventional energy resource would be solar power.
diff between oops and conventional programming
yes satellite is between moon and earth. moon can see a satellite only for ten hours in a day
The main difference between cellular and a cellular cementum is that cellular cementum contains cementocytes, while a cellular cementum does not contain any active cells and can not regenerate.
there is no comparison between them as far as i know
what is the comparison between Hubble telescope and Galileo telescope
The difference between satellite tv service and cable is satellite tv offers more channels and are more expenisve. No, they don't receive their signals from a satellite.
difference between conventional costing methodology ang activity costing
Comparison happens after evaluation. Without evaluation ther is no comparison