What are the importance and uses of Satellites in our life ?
The satellites are launched into the space to do a specific job , There are satellites that are launched to monitor the cloud patterns for the weather station , There are satellites that launched to send television signals for Sky TV , And every satellite has to be designed specifically to fulfill its function .
The satellites are used for many things such as the communication , the oceanography , the astronomy , the surveillance , They help many scientists get a perceptive view at all kinds of objects anywhere in the world .
The satellites send television signals directly to homes , They send the signals from a central station that generates programming to smaller stations that send the signals locally via the cables or the airwaves , The news broadcasts are sent from the field to the studio via the satellite .
The satellites provide in the flight phone communications on the airplanes , They are the main conduit of voice communication for the rural areas and the areas where the phone lines are damaged after a disaster , And they provide the primary timing source for the cell phones and the pagers .
The communications satellites have the ability to rapidly communicate between a number of widely dispersed locations , They help the big manufacturing companies and the department stores to perform inventory management , They provide the instant credit card authorization and automated teller banking services to even small towns , They pay at the pump gas at the freeway gas stations , and video conferencing for the international corporations .
The astronomy satellites are the new technology that are mounted on earth orbiting satellites or on the deep space probes , and they can give us an unobstructed view with out the earth’s atmosphere interfering . They carry the detectors to record the electromagnetic radiation at wavelengths shorter than visible light .
The satellite based navigation systems like Navstar Global Positioning Systems enable anyone with a handheld receiver to determine his location to within a few meters ,They are known colloquially as GPS .
GPS locators are increasingly included in the car direction services . GPS based systems are used by the civilians and the military for navigation on land , the sea , and the air , and they are crucial in the situations like a ship making a difficult course in a harbor in the bad weather or the troops lost in unknown regions .
There are the surveillance or spy satellites , There are four kinds of major satellites ( White 100 ) which is the most commonly used , The reconnaissance use cameras to take the pictures of a particular place from up above , And they also have a radar and infrared detectors , so , they can detect the things in the dark or the things that are covered by something or camouflage .
The reconnaissance satellites are used to spy on other countries , They provide intelligence information on the military activities of foreign countries , They can detect the missile launches or the nuclear explosions in space .
The reconnaissance satellites can pick up and record the radio and radar transmissions while passing over a country and they can be used as an orbital weapon by placing the warheads on a low orbit satellite to be launched at a ground target .
The ocean surveillance satellites are used to search for the ships or the submarines , They can spot the nuclear vessels , And new advancements may allow them to scan the depths of the ocean , Early warning and Elint satellites are primarily used by the armed forces , These basically protect the countries from the sneak attacks , and they can be used to detect if other countries are building or storing the nuclear warheads .
Elint is the basic spy satellite that picks up the radio transmissions , and the maps location of countries defense bases , It is the most important military satellite because it does not let another country to put together an attack without another country knowing .
The satellites provide the meteorologists with the ability to see the weather on a global scale , They allow them to follow the effects of phenomena like the volcanic eruptions and the burning gas and the oil fields to the development of large systems like the hurricanes .
The satellites are used in the field of the oceanography , Now the marine scientists and the marine biologist can detect everything that goes on in the ocean , They use the satellites to detect the oceans affect on environment , they can analyze the wave patterns .
They can monitor the marine surface life , they can analyze the ocean tendencies and the currents , and they can get a complete synoptic view of the ocean , These things help them tell you what the water will be like , and help them find out about the ocean life .
It is very important to know that the satellites are the best sources of data for the climate change research , They monitor the ocean temperatures and the prevailing currents , The data acquired by the satellite borne radars were able to show the sea levels have been rising by three mm a year over the last decade .
Imaging satellites can measure the changing sizes of the glaciers which is difficult to do from the ground due to the remoteness and darkness of the polar regions , The satellites can determine the long term patterns of the rainfall , the vegetation cover , and the emissions of the greenhouse gases .
Earth observation satellites can monitor the ocean and the wind currents , the extent of the forest fires , the oil spills , and the airborne pollution , This information helps organize the emergency responders and the environmental cleanup .
The satellites can take the search out of search and rescue for the people in the distress in the remote regions , Distress radio beacons directly linked to a search and rescue satellite can lead the rescuers quickly and accurately to the land , the sea , or the air emergency location .
The remote sensing is observing and measuring our environment from a distance , They are put into the space to monitor the resources that are important for humans , They may track the animal migration , They locate the mineral deposits , they watch the agricultural crops for the weather damage .
These satellites can take the photographs and observe the areas all over the globe , they can monitor the areas in which the climate is very harsh , or which are nearly impossible to reach by land .
The satellites can detect the underground water and the mineral sources , They can monitor the transfer of the nutrients and the contaminants from the land into the waterways , and they can measure the land and the water temperatures , the growth of the algae in the seas , and the erosion of the topsoil from the land .
Imaging satellites produce high resolution data of the entire landmass on earth which are used in the closely guarded military capability , but now anyone with an internet connection can find his house using Google Earth .