Last Words on CETI and some Space Travel Basics

1. Last Words on CETI and some Space Travel Basics HNRS 228 w/Prof. Geller

2. What I Will Cover • Final words about CETI • Space Travel • Space Environment • Spaceflight Projects • Spaceflight Operations

3. A Cartoon about CETI

4. What does a telescope do? • Collect electromagnetic waves • Collecting ability proportional to the square of the diameter of the objective • Resolve electromagnetic sources • Related to the atmosphere, wavelength and curvature of the objective • Magnify surfaces of planets and the Moon • Magnification only of Moon, Sun and planets

5. Looking Beyond the Eyes

6. Optical Telescopes Reflector Refractor

7. Different Views of Sun Sun in Hydrogen-alpha Sun in X-ray

8. Radio Astronomy Basics

9. A Little More Detail

10. Jansky’s Original Radiotelescope

11. Grote Reber’s Telescope

12. 170 foot Diameter Radio-telescope at Green Bank, WV

13. The 100-meter Green Bank Telescope

14. Even Bigger than you Think

15. Jupiter in Radio

16. Saturn in Radio

17. 3C296 Radio/Optical Composite

18. A Vision for George Mason(based upon Univ. Indianapolis)

19. Small Radio Telescope Justification • Radio science observations in the L-band • L-band lies in the 1400-1427 MHz region of the electromagnetic spectrum • detection of what astronomers call the 21-cm line of hydrogen • this is a portion of the hydrogen spectrum, in the radio region of the electromagnetic spectrum, which is generated by the neutral hydrogen clouds in the interstellar medium

20. Small Radio Telescope Justification • Observations in C-band, which is 4313-4338 MHz and 3788-3813 MHz • Radio science observations in the C-band allow for the radio emission examination of the moon, which acts as a body at a temperature of 200 K. • Students will be able to scan the moon, and detect the estimated 6000 joules of energy from the lunar surface.

21. GMU SRT Background • Funding • National Science Foundation • education portion of grant won by Dr. Rita Sambruna • Order History • ordered first week of June 2002 • stated 12 week delivery time • received 15 October 2002 • damaged antenna

22. GMU SRT Background Part II • Order History • boxes damaged • FedEx insurance inspector called and visited to assess damage - refused claim • replacement parts to be shipped by vendor • Base assembled on roof • 1 November 2002 • Remaining electronics and replacement antenna parts received 30 January 2003

23. Did You Say Fragile?

24. Picking Up the Pieces on the Roof

25. Whistle While You Work

26. Tolerance

27. Cleanup On The Roof

28. The Base Of SRT

29. Servo Motors Attachment

30. Servos with Ring Assembly

31. Dish/Receiver Assembly

32. Readying for Final Mechanical Assembly

33. From Mechanical to Electrical

34. Assembled and Ready to Test

35. Sample Data

36. Even Smaller - Radio Jove

37. Small Radio Science Demonstration Projects • Undergraduate research • Steve Richardson • web site built with some results from data acquired using U of Indianapolis • http://physics.gmu.edu/~arichar6/radio/index.html • prepared presentation for GMU “innovations” fair • prepared presentation for CPAC meeting at Bucknell University

38. Smoothing Data

39. Visualizing the Data

40. Colorizing the Data

41. Must Deal With Noise

42. Worldwide Noise Sources

43. Family Portrait (2001 conference)

44. Radio Astronomy atGeorge Mason University

45. Looking To The Future

46. Future GMU Observatory

47. Space Environment • Solar System • Reference System • Gravity and Mechanics • Trajectories • Planetary Orbits • Electromagnetics

48. Solar System Considerations • Distance • From Sun • Energy, temperature, condensation of matter • Hostile Environment • Radiation (gamma ray) • Radiation (x-ray) • Radiation (UV)

49. Coordinate Reference Systems • Geographic • Celestial • Precession

50. Gravity and Mechanics • Orbits • Kepler • Newton