SS2 Commerce Lesson Note on Modern Means of Communication

The website has the complete lesson note for all the subjects in secondary school but this piece showcases the SS2 Commerce Lesson Note on Modern Means of Communication. You can use the website search button to filter out the subject of interest to you.

CLICK HERE to download the complete Document: DOWNLOAD HERE

TOPIC: Communication

CONTENT:

1. Satellite, Nigerian SATI and SATII.
2. Global system of mobile telecommunication, Courier services
3. Computer appreciation
4. Internet,
5. e-mail

 Sub-Topic 1: Satellite, Nigerian SATI and SATII,

A satellite is an object that orbits or moves round another object. Satellites may be natural (such as planets and moons) or artificial such as the communication satellite (COMSAT). A satellite is communication equipment which is deployed and stationed in the space to send signals to different countries of the world. Satellites are systems of global transmission of signals from one place to another. With the satellite, it is now possible for live telecast of an event in Lagos to be viewed in America, e. g. an international football match. Satellite enhances the work of NITEL as messages are sent and received in many countries of the world, especially those that are members of International Satellite Communication.

Functions of Satellites

1. Satellite provides telephone and television links among nations of the world.
2. It ensures international or global transmission of messages.
3. It ensures that live events are covered and watched simultaneously all over the world.
4. Video conferencing meetings are made possible by satellite television transmission.
5. It helps in international cooperation and interaction.

NIGERIA SAT-1, NIGERIA SAT-2 AND NIGERIA SAT-X

The Nigerian Satellites are known as Nigeria Sat-1, Nigeria Sat-2, and Nigeria Sat-X. In September 27 2003, Nigeria launched into space, a satellite named Sat-1. It had a 5 year lifespan, so that it was to last till 2008. However, Nigeria Sat-2 and Nigeria Sat-X were launched into orbit form Russia on the August !8, 2011. The Nigerian satellites are part of the world-wide Disaster Monitoring Constellation System which is a fleet of separately owned small satellites coordinated by DMC International Imaging Limited for daily global monitoring. Nigeria sat-2 and X, have five years lifespan as well. Nigeria Sat-2 is more advanced in technology and is the most advanced satellite of its kind in the global community.

The main objective of Nigeria Sat-1, and Nigeria Sat-2 and Nigeria Sat-x is disaster monitoring. Data from the satellites are used within Nigeria to monitor pollution, land use and other medium-scale phenomena.  Images of the country obtained from the satellites are beamed back to the control station for use by the government.

PURPOST OF NIGERIA SAT-1, NIGERIA SAT-2 AND NIGERIA SAT-X

• To give advance warnings of natural disasters like floods, earthquakes, volcanic eruptions and storms.
• To prevent or manage the occurrence of man-made disasters like oil pollution, desertification, erosion etc.
• It is used for mapping, land use planning and management of sustainable grazing etc.
• Information from these satellites is used in solid mineral exploration and exploitation, including general geological mapping and map update or revision.
• To provide the technology needed to bring education to all parts of the country via distant learning.
• They could be used in public health delivery
• For local and regional planning for tourism and its potentials.

EVALUATION

1. State five functions of the following: a. satellite b. Nigeria Sat-1, Sat-2 and Sat-x

Sub-Topic 2: Global system of mobile telecommunication, Courier services

GLOBAL SYSTEM FOR MOBILE TELECOMMUNICATION (GSM)

Click on the Downloadable Button to get the FULL NOTE