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Morehead State University Morehead, KY Prof. Bob Twiggs RJTwiggs@gmail

Understanding Orbits Chapter 4-9. Morehead State University Morehead, KY Prof. Bob Twiggs RJTwiggs@gmail.com. Click here for audio comment on slides. . Page 103. SSE-120. Understanding Orbits. Page 105-6. SSE-120. Understanding Orbits. Page 105-6. SSE-120. Understanding Orbits.

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Morehead State University Morehead, KY Prof. Bob Twiggs RJTwiggs@gmail

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  1. Understanding Orbits Chapter 4-9 Morehead State University Morehead, KY Prof. Bob Twiggs RJTwiggs@gmail.com Click here for audio comment on slides.

  2. Page 103 SSE-120

  3. Understanding Orbits Page 105-6 SSE-120

  4. Understanding Orbits Page 105-6 SSE-120

  5. Understanding Orbits Page 155-156 SSE-120

  6. Understanding Orbits Eccentricity Page 157 SSE-120

  7. Understanding Orbits Page 159 SSE-120

  8. Understanding Orbits Page 164 SSE-120

  9. Understanding Orbits Page 273 SSE-120

  10. Understanding Orbits North Pole to the South Pole (the shortest diameter) is approximately 12,714 km. The equatorial diameter (the longest diameter) is approximately 12,756 km. Page 273 SSE-120

  11. Understanding Orbits What about gravitational pull on the satellite in the orbit? Would it be uniform all around the orbit? Page 273 SSE-120

  12. Understanding Orbits Page 277 SSE-120

  13. Understanding Orbits Page 179 SSE-120

  14. Understanding Orbits Page 180 SSE-120

  15. Understanding Orbits What determines the velocity of spacecraft in a circular orbit? Fc Altitude: given v Velocity of spacecraft Vcir = 631.3481 r-1/2 km/sec r - is from center of the earth – 6378 km Orbit Vesc = 892.8611 r-1/2 km/sec Fg Orbit Period Circumference = 2pr Time to orbit = distance/velocity Orbit Period = Time to orbit (minutes) What about gravitational pull on the satellite in the orbit? Would it be uniform all around the orbit? Page 181 SSE-120

  16. Understanding Orbits Spacecraft Orbital Velocity and Orbit Period -2 What is ISS altitude? h = (150) (1.852) = 278 km LEO = 17,142 mi/hour convert km/s mi/hour X (km/s) x 60s/m x 60m/hour x (1/1.6) mi/km = X (km/s) x 2250 mi/hour V = (7.739 km/s) x 2250 mi/hour = 17,142 mi/hour SSE-120

  17. Understanding Orbits Altitude: given Velocity of spacecraft Vcir = 631.3481 r-1/2 km/sec r - is from center of the earth – 6378 km Vesc = 892.8611 r-1/2 km/sec Orbit Period Circumference = 2pr Time to orbit = distance/velocity Orbit Period = Time to orbit (minutes) Page 184 SSE-120

  18. Understanding Orbits Page 184 SSE-120

  19. Understanding Orbits Page 184 SSE-120

  20. Understanding Orbits Page 203 SSE-120

  21. Understanding Orbits Page 272 SSE-120

  22. Understanding Orbits Page 273 SSE-120

  23. Understanding Orbits Sun-synchronous LEO orbit Page 275 SSE-120

  24. Understanding Orbits Page 277 SSE-120

  25. Understanding Orbits Perturbation Orbital Velocity Orbit period Ascending node Plane changes Page 278 SSE-120

  26. Understanding Orbits Page 278 SSE-120

  27. Understanding Orbits Page 278 SSE-120

  28. Understanding Orbits Page 308 SSE-120

  29. Understanding Orbits Page 308 SSE-120

  30. Understanding Orbits Page 315 SSE-120

  31. Understanding Orbits Page 315 SSE-120

  32. Understanding Orbits Morehead State University Morehead, KY Prof. Bob Twiggs RJTwiggs@gmail.com SSE-120

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