Satellite orbits

Presented at the Space Technology Institute
Spoke about different Satellite orbits

Transcript

1. SATELLITE ORBITS Space Technology Institute (STI) 0 1 F E B 1 9 - Y O H A N N I S K I F L E
2. CONTENTS W H A T I S A N O R B I T ? H O W D O S A T E L L I T E G E T T O A N O R B I T ? T Y P E S O F O R B I T S H O W S A T E L L I T S S T A Y I N A N O R B I T ? A N S W E R F O R 2 Q U E S T I O N S L I T T L E B I T O F H I S T O R Y
3. HISTORY 1543 Nicolas Copernicus(1473 - 1543), published a book detailing how the sun is at the center of the solar system, and that the planets moved around the sun 1609 Johannes Kepler (1571 - 1630), observed night sky and published the famous kepler's law of planetary motion. Importantly, he discovered that the orbit of the planets aren't circle.
4. CONT . . . 1687 Isaac Newton (1642 - 1726), published his famous law of gravitation He also showed that his law of gravity correctly predicted mathematically that the orbit of the planets always follow an elliptical path. source : https://www.express.co.uk
5. NEWTON LAW OF GRAVITATION All objects with mass attract each other. Gravity is always attractive G is a gravitational constant
6. OUR SOLAR SYSTEM source: vectorstock.com/13673032
7. CONT . . . source: moonblink.info/Eclipse/why/solsys
8. CONT . . . source: wikimedia.org/
9. WHAT'S AN ORBIT? source: space-facts.com/planet-orbits/ An orbit is the path one object in space takes around another
10. HOW DO SATELLITES GET TO AN ORBIT? source: Getty images source: Getty images
11. CONT . . . source: https://www.gizmodo.com source: Getty images
12. CONT . . . source: Nasa.com High Horizontal speed - We still fall, but NEVER hit the ground. This is an ORBIT To reach orbit you must: Go High enough Get High enough horizontal velocity
13. HOW DO THEY STAY IN AN ORBIT? Once above the Atmosphere, there is no drag, so the orbit can go on FOREVER. In reality, There is little bit of Air above earths atmosphere.
14. TYPES OF ORBITS LOW EARTH ORBITS - LEO MEDIUM EARTH ORBITS - MEO GEOSYNCHRONOUS EARTH ORBITS - GEO ALT: 100 - 2000 KM, HV(Avg): 6.9 - 7.8 km/sec PER: 68 - 127 min ALT: b/n LEO & GEO Exact ALT: 35,862 KM, HV:3 km/sec, PER: 24 hrs
15. THE QUESTIONS source:https://www. hanfordsentinel.com source: https://www.spaceanswers.com Why Astronauts in ISS experience weightlessness? Why do space shuttle catch- fire during re-entry?
16. THANK YOU References NASA Knows!. (2015, June 01). What Is Orbit? Retrieved from https://www.nasa.gov/audience/forstudents/5- 8/features/nasa-knows/what-is-orbit-58.html, JAN 29 Space Shuttle thermal protection system. (2018, December 03). Retrieved from https://en.wikipedia.org/wiki/Space_Shuttle_thermal_protection_system, JAN 30 C. A. (2015, June 17). What is an orbit? Retrieved February 1, 2019, from https://cnes.fr/en/what-orbit Author, C. (2015, June 17). What is weightlessness? Retrieved January 22, 2019, from https://cnes.fr/en/what- weightlessness