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1.1 Background of the Study
A communications satellite is an artificial satellite that relays and amplifies radio telecommunications signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth. Communications satellites are used for television, telephone, radio, internet, and military applications. There are about 2,000 communications satellites in Earth’s orbit, used by both private and government organizations (Labrador, 2015). Many are in geostationary orbit 22,236 miles (35,785 km) above the equator, so that the satellite appears stationary at the same point in the sky, so the satellite dish antennas of ground stations can be aimed permanently at that spot and do not have to move to track it.
The high frequency radio waves used for telecommunications links travel by line of sight and so are obstructed by the curve of the Earth. The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points. Communications satellites use a wide range of radio and microwave frequencies. To avoid signal interference, international organizations have regulations for which frequency ranges or “bands” certain organizations are allowed to use. This allocation of bands minimizes the risk of signal interference.
Communication plays a vital role in present era. There are means to communicate with each other out of which satellites have revolutionized communication. GEO, MEO, LEO are the three basic types of satellites. In general satellite communication is transferring of a signal between a sender and a receiver. Since transferring of a signals in done in space this type of communication can be termed as space communication. At first satellites were solely used for military purposes, surveillance, weather forecasting and earth imaging.
For commercial satellite communications GEO satellites have become a major backbone. Approximately 2,000 artificial satellites orbiting Earth relay analog and digital signals carrying voice, video, and data to and from one or many locations worldwide. Satellite communication has two main components: the ground segment, which consists of fixed or mobile transmission, reception, and ancillary equipment, and the space segment, which primarily is the satellite itself. A typical satellite link involves the transmission or uplinking of a signal from an Earth station to a satellite. The satellite then receives and amplifies the signal and retransmits it back to Earth, where it is received and reamplified by Earth stations and terminals. Satellite receivers on the ground include direct-to-home (DTH) satellite equipment, mobile reception equipment in aircraft, satellite telephones, and handheld device
1.2 Statement of the Problem
Satellites play a significant role in effective communication; despite the contribution of satellites to global communication, there are still some problems facing the satellite industry. This problem is based on the fact that developed countries with advance level of technology benefit from the services of satellites compared to under-developed countries. Secondly there have been series of studies on satellites but not even a single study has been carried on the Performance Evaluation of satellite global network in communication in Nigeria.
1.3 Aims and Objectives of the Study
The main aim of the research work is to examine performance evaluation of satellite global network in communication in Nigeria. Other specific objectives of the study are:
to examine the prospects and challenges of satellite communication in Nigeria
to determine the extent to which satellite network enhances the ease of information management and dissemination in Nigeria.
to determine impact of satellite communications on developing economies.
to determine the inter-satellite links in Nigeria.
to examine the technical overview of satellite communications.
to determine the relationship between transmission, distribution and monitoring of satellite for effective global communication
1.4 Significance of the Study
The study is centered on performance evaluation of satellite global network in communication and will be of immense benefit to the communication industry, the government (local, state and the federal) and other researchers that desire to carry out similar research on the above topic as the findings of the study will educate the above population on the satellite network, the role of satellite network in global communication and the factors affecting the efficiency of satellite in global communication. Finally the study will contribute to the body of existing literature and knowledge in this field of study and provide a basis for further research.
1.5 Research Methodology
Doctrinal method and also empirical shall be mainly adopted in this research which will entail the consideration of statutes, textbooks of both foreign and local authors, journals, case laws conferences, materials form, collection of facts and data through internet and other relevant materials will be consulted.
1.6 Scope of the Study
The study on the role of satellite network in global communication will cover on satellite network, the role of satellite network in global communication and the factors affecting the efficiency of satellite in global communication.
1.7 Limitation of the Study
Financial constraint: Insufficient fund tends to impede the efficiency of the researcher in sourcing for the relevant materials, literature or information and in the process of data collection (internet).
Time constraint: The researcher will simultaneously engage in this study with other academic work. This consequently will cut down on the time devoted for the research work.
1.8 Definition of Terms
Satellite: a satellite is an artificial object which has been intentionally placed into orbit
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