What is a satellite?
• A satellite is an object in space that orbits or circles around a bigger object
• There are two kinds of satellites:
➢ natural (such as the moon orbiting the Earth) or
➢ artificial (such as the International Space Station orbiting the Earth).
• Man-made satellites are highly specialized wireless receiver transmitters
that are launched by a rocket and placed in orbit around the earth.
• These satellites have wide applications in many fields including weather
forecasting, TV broadcast, Navigation (GPS) etc.
• there are four kinds of satellite according to the orbit in which they travels:
a) Geosynchronous satellite:
1. A satellite in the geosynchronous orbit is known as Geosynchronous
2. a geosynchronous satellite revolves around the planet at the same
speed at which the planet rotates on its axis. That’s the reason why
this kind of satellite appears to be in the same region in the sky (at a
given time of the day) when viewed from a particular position on
3. A geosynchronous orbit (sometimes abbreviated GSO) is an orbit
around Earth of a satellite with an orbital period that matches Earth's
rotation on its axis, which takes one sidereal day (23 hours, 56
minutes, and 4 seconds)
b) Geostationary satellite:
1. A satellite in Geostationary orbit is known as Geostationary Satellite.
2. A geostationary equatorial orbit (GEO) is a circular geosynchronous
orbit in the plane of the Earth's equator with a radius of
approximately 42,164 km (26,199 mi) (measured from the center of
the Earth). A satellite in such an orbit is at an altitude of
approximately 35,786 km (22,236 mi) above mean sea level.
3. It maintains the same position relative to the Earth's surface.