2. Introduction to Satellite Technology 12 th Grade Science Class Cindy Garis

3. Introduction to Satellite Technology The objective of this lesson is to gain a better understanding of what a satellite is and how it works.

4. Navigation Click to go backwards Click to go backwards Click to return to the Main Menu Click to return to the Main Menu Click to go forward Click to go forward

5. Main Menu Section: (1) (1) Define Satellite and Orbits (1) (2) (2) First Satellite and number of Satellites (2) (3) (3) How we communicate with a Satellite (3) (4) (4) Satellite applications (4)

6. Section 1: Define Satellite and Orbits  A satellite is an object in orbit around a celestial body.  Orbit – the path of a satellite around a body (e.g. the earth) which is stable under the influence of gravity.  Satellite is falling towards earth. It never crashes – it orbits

7. Section 1: Define Satellite and Orbits   ORBITAL LEVELS – –LEOS: LOW EARTH ORBIT (100- 300mis.MILES) – –MEOS: MEDIUM EARTH ORBIT (6,000 – 10,000 MILES) – –GEOS: GEOSTATIONARY EARTH ORBIT (22,223 MILES   TYPES OF ORBITS: –ELLIPTICAL (APOGEE AND PERIGEE) –CIRCULAR –POLAR –GEOSTATIONARY

8. Section 2: First Satellite and number of satellites  Sputnik 1 was the first artificial satellite launched October 4, 1957.  There have been 4000 satellites launched in history. There are 2200 currently in orbit.  History of Sputnik1 History of Sputnik1 History of Sputnik1  Number of man-made satellites in orbit Number of man-made satellites in orbit Number of man-made satellites in orbit

9. Section 2: First Satellite and number of satellites  The largest satellite orbiting the earth is the moon.

10. Section 3: How we communicate with a Satellite  A transponder receives transmissions from earth (uplink), changes signal frequency, amplifies the signal and transmits the signal to earth (downlink).

11. Section 3: How we communicate with a Satellite

12. Uplink Downlink

13. Section 4: Satellite applications   Satellites are used for the following applications: – –TELECOMMUNICATIONS – –BROADCASTING – –NAVIGATION – –WEATHER – –GPS – –MILITARY

14. Multiple choice Question 1 of 3 1)What is the largest satellite? a) Sputnik 1 a) Sputnik 1a) a) b) The moon b) The moonb) b) c) GPS system c) GPS systemc) c)

15. Question 1 a)Sorry, wrong answer.  Sputnik 1 was the first man-made satellite launched. Go back to the main menu and review Section 1 to try again. Go back to the main menu and review Section 1 to try again.

16. Question 1 b) Correct!  The moon is the largest satellite. Click the right arrow to proceed to question 2.

17. Multiple choice Question 2 of 3 2)Currently, how many satellites are there in orbit? a) 4000 a) 4000a) a) b) 3000 b) 3000b) b) c) 2200 c) 2200c) c)

18. Question 1 a)Sorry, wrong answer. GPS is an application of a man-made satellite. GPS is an application of a man-made satellite. Go back to the main menu to review Section 1 and try again. Go back to the main menu to review Section 1 and try again.

19. Question 2 a)Wrong answer. There have been 4000 satellites launched in history. There have been 4000 satellites launched in history. Go back to the main menu and review Section 2 to try again.

20. Question 2 b) Wrong answer. 3000 was not mentioned anywhere. 3000 was not mentioned anywhere. Go back to the main menu and review Section 2 to try again.

21. Question 2 c)Correct! There have been 4000 satellites launched history. There have been 4000 satellites launched history. Click the right arrow to proceed to question 3. Click the right arrow to proceed to question 3.

22. Multiple choice Question 3 of 3 3) When A transponder receives transmissions from earth this is typically known as an: a) a) Downlink a) b) b) Amplify b) c) c) Uplink c)

23. Question 3 a) Wrong answer. A transponder receives transmissions from earth (uplink), changes signal frequency, amplifies the signal and transmits the signal to earth (downlink). A transponder receives transmissions from earth (uplink), changes signal frequency, amplifies the signal and transmits the signal to earth (downlink). Go back to the main menu to review Section 3 and try again. Go back to the main menu to review Section 3 and try again.

24. Question 3 b) Wrong Answer A transponder receives transmissions from earth (uplink), changes signal frequency, amplifies the signal and transmits the signal to earth (downlink). A transponder receives transmissions from earth (uplink), changes signal frequency, amplifies the signal and transmits the signal to earth (downlink). Go back to the main menu to review Section1 and try again. Go back to the main menu to review Section1 and try again.

25. Question 3 c)Correct! A transponder receives transmissions from earth (uplink), changes signal frequency, amplifies the signal and transmits the signal to earth (downlink). A transponder receives transmissions from earth (uplink), changes signal frequency, amplifies the signal and transmits the signal to earth (downlink). Proceed to next slide. Proceed to next slide.

26. The End The End