Types Of Satellites And Their Uses Pdf

The antennas are at fixed positions and use an uplink band of 1 634 5 1 660 5 mhz and downlink in the range of 1 530 1 559 mhz.

Types of satellites and their uses pdf.

These orbit directly above the equator with a period equal to one earth day. Passive satellites and active satellites. There are different types of tether satellites including skyhooks format flying tethers momentum exchange tethers and electrodynamic tethers. These fly at low altitudes about 160km and are used for earth observation and surveillance.

Types of satellites based on its application are. Types of communication satellites. P assive satellites receive the electromagnetic. Polar or sun synchronous satellite.

On 4 october 1957 the soviet union launched the world s first artificial satellite sputnik 1 since then about 8 900 satellites from more than 40 countries have been launched. The satellites are launched with a specific objective in mind pertaining to several uses such as communications research in scientific areas forecasting the weather and intelligence. Satellites can be classified by their function since they are launched into space to do a specific job. It can be used for military purposes.

Communication satellites are of two types. A polar satellite is a low altitude satellite orbit around the earth in north south orbit passing over the north pole and south pole. The communication satellites are used for spying in enemy countries i e. They complete exactly one rotation per day.

The type of satellite that is launched to monitor cloud patterns for a weather station will be different than a satellite launched to send television signals across canada. The orbit of the polar satellite is called polar orbit. Tether satellites are mainly used for altitude control stabilization propulsion maintaining relative positions of a larger spacecraft sensor system and momentum exchange. Hence in order to transmit the information or signal over long distances a single satellite or multiple satellites are used to redirect the signals.

In the context of spaceflight a satellite is an object that has been intentionally placed into orbit these objects are called artificial satellites to distinguish them from natural satellites such as earth s moon. Satellites are mainly categorised as. Satellites can be classified based on their applications orbit in which they are placed. The satellite must be designed specifically to fulfill its role.

Satellites weigh around 2 500 kgs.