Satellite and its orbits
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This document summarizes different types of satellites and orbits. It defines a satellite as a solid object that revolves around another due to gravitational forces. Satellites are either passive, simply reflecting signals, or active with onboard processing equipment. The first artificial satellite was Sputnik 1, launched in 1957. Satellites in low-Earth orbit have shorter lifespans but provide better signals, while geostationary satellites remain fixed over one position from the ground. The document also briefly discusses Kepler's laws of planetary motion and their application to Earth.
Satellite and its orbits
- 1. SATELLITE AND IT ORBITS
- 2. CONTENTS SATELLITE TYPES OF SATELLITE HISTORY OF SATELLITE WORKING OF SATELLITE TYPES OF ORBITS EARTH PLANETARY MOTION KEPLERS LAW OF EARTH PLANETARY MOTION CONCLUSION
- 3. what’s mean by satellite ? A Satellite is a solid object which revolves around some body due to the effect of gravitational forces Types of satellites :- 1) Passive satellites 2) Active satellites Passive satellites : A passive satellite only reflects received signals back to earth. Ex. moon is a natural satellite of earth Active satellites : Active satellites are complicated structures having a processing equipment called Transponder . An active satellite acts as a REPEATER
- 4. History of Satellites First satellite that was used for communication purpose in INDIA was - ARYABHATTA (19 April 1975) The first geostationary communication satellite - SYNCOM 3(19 Aug 1963). Father of geostationary communication satellite is -HAROLD ROSEN (Aircraft engineer) The world's first artificial satellite is the Sputnik 1 was launched in 1957
- 5. How Satellites Work : I. A Earth Station sends message in GHz range (Uplink). II. Satellite Receive and retransmit signals back. (Downlink) III. Difference between Downlink and Uplink frequency is 2 GHz.
- 6. TYPES OF ORBITS Low-Earth-Orbit (LEOs) Medium-Earth-Orbit (MEOs) Geostationary ORBIT(GEOs)
- 7. LOW-EARTH-ORBIT (LEO) Altitude (600-1000 KM) satellite gives it a better signal strength Advantages: Reduces transmission delay Disadvantages: Smaller coverage area. Shorter life span (5-8 yrs.)
- 8. MIDDLE-EARTH-ORBIT (MEO) MEOs orbits between the altitudes of 8,000 - 20,000 km above the earth. MEO satellites have a larger coverage. These orbits are primarily reserved for communications satellites that cover the North and South Pole. MEOs are placed in an elliptical (oval-shaped) orbit.
- 9. Geostationary-Earth-Orbit (GEO) From the ground level the satellite appears fixed. GEO satellites have a 24 hour view of a particular area. Coverage to 40% of area Of planet by this satellite
- 22. 686.971 earth days = 1.88 earth year
- 23. 23-Aug-19. 23 Communication satellites bring the world to you anywhere and any time…..
- 24. BY HEMANTH