SS2 Second Term Commerce Lesson Note – Communication

The content is just an excerpt from the complete note for SS2 Second Term Commerce Lesson Note – Communication. Check below to download the complete DOCUMENT

WEEK 1

TOPIC: Communication

CONTENT:

• Satellite, Nigerian SATI and SATII.
• Global system of mobile telecommunication, Courier services
• Computer appreciation
• Internet,
• 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.

To gain full access to the note: DOWNLOAD FILE