Geostationary Satellite

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Geostationary Satellite

  1. 1. GEOSTATIONARY SATELLITE PRESENTED BY WAQAS AHMED
  2. 2. INTRODUCTION OF GEOSTATIONARY SATELLITE <ul><li>A geostationary satellite is any satellite which is placed in a geostationary orbit. Satellites in geostationary orbit maintain a constant position relative to the surface of the earth. </li></ul><ul><li>Geostationary satellites do this by orbiting the earth approximately 22,300 miles above the equator. This orbital path is called the Clarke Belt, in honor of Arthur C. Clarke. </li></ul>
  3. 3. INTRODUCTION CONTINUE <ul><li>In other words, if a satellite in a geostationary orbit is in a certain place above the earth, it will stay in that same spot above the earth. Its latitude stays at zero and its longitude remains constant. </li></ul><ul><li>Geostationary satellites are commonly used for communications and weather-observation. </li></ul>
  4. 4. INTRODUCTION CONTINUE <ul><li>The typical service life expectancy of a geostationary satellite is ten to fifteen years. </li></ul><ul><li>Because geostationary satellites circle the earth at the equator, they are not able to provide coverage at the Northernmost and Southernmost latitudes. </li></ul><ul><li>Geostationary orbits are often referred to as geosynchronous or just GEO. </li></ul><ul><li>A geo-stationary orbit is also sometimes called: stationary , or synchronous orbit . </li></ul>
  5. 5. DIAGRAM OF GEO SATELLITE
  6. 6. CLASSIFICATION <ul><li>LEO (LOWER EARTH ORBIT) </li></ul><ul><li>MEO (MEDIUM EARTH ORBIT) </li></ul><ul><li>GEO (GEOSTATIONARY ORBIT) </li></ul>
  7. 7. ORBITAL ALTITUDE <ul><li>LEO 500-2,000KM Above the earth. </li></ul><ul><li>MEO 8,000-20,000KM Above the earth. </li></ul><ul><li>GEO 35,786KM Above the earth. </li></ul>
  8. 8. HISTORY OF GEO ORBIT <ul><li>The concept of the geostationary orbit has been around since the early part of the twentieth century. </li></ul><ul><li>The person most widely given credit for the concept of using this orbit for communications is ARTHUR C. CLARKE. </li></ul><ul><li>In an article he published in Wireless World in October 1945 titled &quot;Extra-Terrestrial Relays: Can Rocket Stations Give World-wide Radio Coverage?&quot; Clarke extrapolates from the German rocket research of the time to a day when communications around the world would be possible via a network of three geostationary satellites spaced at equal intervals around the earth's equator. </li></ul>
  9. 9. GEO ORBIT DIAGRAM
  10. 10. ADVANTAGES <ul><li>High coverage area. </li></ul><ul><li>Five geostationary satellites are enough to cover all of the regions of the Earth. </li></ul><ul><li>One ground segment is enough for the satellite monitoring. </li></ul><ul><li>No problem with frequency changes. </li></ul>
  11. 11. DIS-ADVANTAGES <ul><li>Polar regions are not observed. </li></ul><ul><li>One big problem with Geostationary satellites is that since they are always positioned above the equator they can't see the north or south poles and are of limited use for latitudes greater than 60-70 degrees north or south. </li></ul><ul><li>Weak signal after traveling over 35,000 km. </li></ul><ul><li>Signal sending delay. </li></ul>
  12. 12. GEOSTATIONARY SATELLITE ARE USEFUL FOR MANY APPLICATIONS <ul><li>TELECOMMUNICATION:- </li></ul><ul><li>World wide operational telecommunication systems for telephones, TV and digitized transmission lines. </li></ul><ul><li>ARMY:- </li></ul><ul><li>Alarm systems - detection of rocket launches. </li></ul><ul><li>Geostationary satellites are also commonly used for communications and weather-observation. </li></ul>
  13. 13. THANK YOU!

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