Satellites
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| Satellites |
Satellite
The satellite is generally defined as any object that orbits another one. We can take the earth as an example related to the sun, and the moon related to the earth. But the word satellite here refers to the machines which are launched to the space to move around earth and other objects. There are lots of satellites orbit our planet which help in taking some pictures for it or for other planets to provide some information about the universe.
The
usage of satellites is so important because of their ability to collect data
about large areas of the planet quickly and in the same time. With the
existence of the satellites, the problem of TV signals and phone calls has been
solved. That will be done by sending the signals to the satellite so, mountains
and buildings are not problems anymore.
Satellite Parts
All
satellites consist of two main parts in spite of the shape and size of the
satellite. The antenna and the power source are the common parts which any
satellite needs to work. The antenna is used for sending or receiving the
information from the satellite to the earth and vice versa. Solar panels are
used mainly as the power source in satellites for generating an electrical
power by using solar energy.
There
are other parts may exist in satellites such as sensors and cameras. These
parts are used for providing information the weather and the land of the earth
in addition to the collection of data about the universe. Rockets are used for
launching the satellites into the space then their will move around earth in
either polar or geo-stationary orbit.
Satellite Applications
Satellite
is used in a wide range of applications which we use in everyday life. Here are
the most important applications of satellites:
ü
Navigation_
It’s a type of satellites placed in space for navigation purposes. The
information provided by this satellite is processed to be applied in navigation
applications. Civilian users use GPS widely which is considered as the first
element of the system. GPS is also used for car navigation for the purpose of
location determining.
ü
Communications_ There
many types of satellites are used for communication purposes. These satellites
help the world to watch live events anywhere all over the world by transmitting
the signals to televisions, radios and phones. The redirection of signals by
using satellites makes them bending around the earth instead of straight
movement.
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Remote Sensing_ The
purpose of the satellite in this case will be for measuring the environment.
For humans, monitoring resources which are achieved by this type of satellites
is so important such as animal resources monitoring, mineral deposits locating
and agricultural crops discovery.
ü
Weather_ Weather
satellites are used by Meteorologists to provide the needed images from the
space. It can be used to measure the released energy and heat which radiated
from the earth’s atmosphere. The temperature of the sea can be provided also by
the satellite. The amount of water vapour, snow and ocean depth can also be
known by the information that weather satellites provide us with.
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