A satellite can be defined as a self sufficient system of communication which has the capability of receiving signals from the Earth and then by making use of a transponder they retransmit those signals back. The transponder which is used to retransmit the signals is an integrated receiver which transmits the radio signals. Some of the major components of a satellite are the systems of communication which includes transponders and antennas to receive and retransmit the signals, the system of propulsion which consists of the rockets is needed to propel the satellite and the power system which consists of the solar panel which is the main power supplier.
A satellite is launched into the orbit at the speed of 17,500 miles per hour with the help of the rockets and is moved to a space environment where it could be subjected to temperature extremes and radiation throughout its operational life which could be more than 20 years. All satellites are generally very light weight so as to keep in control the operational costs of launching it. Moreover they are required to perform at a high reliability of 99.99% in the space vacuum without any prospect of repairing or maintenance.
Types Of Satellite Services:
Satellite Services come in many different shapes and sizes. The dynamics of one’s business is the determining factor of the optimal configuration of the satellite.
MSS or Mobile Satellite services can be defined as the satellites for network of communications which are intended for use with mobile phone devises and portable wireless phones. There are 3 different kinds of mobile satellite services: aeronautical MSS (AMSS), land MMS (LMMS), maritime MSS or MMSS. A telephone which uses the MSS is just like the cell phone network, the only difference being that the repeaters are located around the orbit of the globe rather than on the earth’s surface. If there are enough satellites within the system which are properly planted around the earth, then the MSS could link any 2 wireless phones at any time no matter their location. They are also interconnected with the land based cell phone networks. The MSS network is used in commercial airlines so that the airplane can connect with any location no matter how remote it is.
Satellite phone service depends on a network of satellites which are either geostationary or fixed above the equator or LEO (low earth orbit) which is like anywhere between 500 – 1000 miles above the earth’s surface. It is always safe to be prepared for natural calamities likes flood, tornadoes, hurricanes, fire or earthquake which wreaks havoc on the entire system of telecommunications. The satellite phones which are a very important technological tool to bypass the entire local system of communication are never affected by violent storms and can function almost anywhere in the world including the middle of the ocean.
Traditionally satellite phones were bought by shippers, government, agencies for public safety and search and rescue organizations but in recent times we can see many private individuals buying satellite phones as an insurance against losing communication capability with the whole world in times of emergency. There are three major reliable networks for satellite phones which are the Inmarsat, Iridium and Globalstar. All satellite phone handsets are light weight and a bit larger than the regular cell phones. While Iridium offers a high class global coverage the hand sets of Inmarsat are very affordable and easy to use.
Satellite internet service is a form of high speed internet service which uses telecommunication satellites on the orbit of the Earth in order to provide internet access to its customers. The hardware of each subscriber includes a satellite dish antenna along with a transceiver which operates in the microwave section of the spectrum of the radio. Internet access by satellite is provided through the geostationary satellites or through the low earth orbit satellites. However a clear sky speeds up the internet while a cloudy sky can make the process very slow. Satellite internet service would cover areas where the cable or DSL access is not available.
However the satellite internet would offer less bandwidth network when compared to DSL or cable and network applications like online gaming or VPN might not function correctly over the satellite internet because of latency issues. However satellite internet might come handy in remote regions and underdeveloped areas where the conventional DSL is either unavailable or doesn’t function properly. A southern and clear line of sight between the dish and the satellite is an essential prerequisite for uniform communication over satellite. The transmission can be affected by snow, rain or other precipitation related problems.
In the early 1990’s when the satellite tv service first hit the market the installation of home dishes were an expensive affair where the high cost metal units consumed a considerable part of your yard space. However in present times one can see the compact satellite dishes perched up on rooftops all over the cities. The satellite tv is similar to a broadcast tv where a wireless system is used to deliver the tv programs directly to the house of the viewers. One of the main drawbacks of the normal broadcast televisions are the problem of range since the signals used to broadcast television comes out from the antennae in a straight line.
Therefore in order to receive the signals you are required to be in a direct line of sight of the antenna. Had the earth’s surface been flat then the signals could be easily picked up even from a thousand miles distance. Satellite television has put an end to all these problems by transmitting the signals from satellites which are orbiting the planet. Being high in the space there are lots of customers on the line of sight. The satellite dishes which are installed in the homes are specialized antennas which transmit and receive radio signals. The satellites always keep pace with the moving earth so that you need to direct the dish towards the satellite only once and then it picks up the signals without any need of further arrangement.