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Satellite Motion

Satellite Motion. Monika V Sikand Ph.d Student Stevens Institute of Technology Department of Physics. Light and Life Laboratory. Hoboken. OBJECTIVE. Review laws of motion and gravitation Satellite motion Escape velocity Geosynchronous orbit(Telecommunication satellites).

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Satellite Motion

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  1. Satellite Motion Monika V Sikand Ph.d Student Stevens Institute of Technology Department of Physics. Light and Life Laboratory. Hoboken.

  2. OBJECTIVE • Review laws of motion and gravitation • Satellite motion • Escape velocity • Geosynchronous orbit(Telecommunication satellites)

  3. Newton’s laws of motion I. Law of Inertia II. F=ma III. Action-Reaction Isaac Newton January 4, 1643 -March31,1727

  4. What is Gravity?

  5. Gravity is a pulling force It pulls things down towards the earth

  6. Things fall because of gravity

  7. Things always fall down

  8. Why do people not fall off the earth?

  9. Newton’s Law of Gravitation

  10. Gravity holds everything and every one on the earth

  11. In Space, Gravity keeps the planets moving around the sun

  12. Gravity on earth and moon

  13. So how can we understand orbital motion?

  14. Motion of the ball on earth

  15. Example

  16. Earth’s curvature

  17. Satellite Smaller body revolving around a larger body

  18. Natural satellites Moon, planets, comet

  19. Artificial satellites Weather , spy , communication

  20. Escape velocity Artificial satellite in a circular orbit around earth first achieving a speed of 7900m/s. If speed greater than 7900m/s satellite has a elliptical orbit. If velocity greater than 11km/s then satellite leaves earth’s orbit and has a escape orbit. The escape orbit’s velocity is called escape velocity.

  21. Figure 7-22Satellite orbits

  22. Geostationary Earth Orbit (GEO) • Orbit is synchronous with the earths rotation. • From the ground the satellite appears fixed. • Altitude is about 22,300 miles or 36,000Km. • Coverage to 40% of planet per satellite.

  23. Conclusion • Newton’s law of gravitation F =Gm1m2/r2 • Satellites are revolving bodies around earth. • Escape velocity is the maximum velocity required to escape the earth’s orbit. • Geostationary orbits are synchronized with earth’s rotation at 36000 km of height.

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