Geosynchronous Satellite

Geosynchronous Satellite: a slide for BMARPC lecturer cum network engineer recruitment. It was a fantastic experience. It was about satellite, classification, basic theory, difference and most importantly Bangabandhu 1 satellite!

1. Geosynchronous Satellite By MD. Rezaul Islam Roll: 19654 Candidate to Lecturer cum Network Engineer

2. Topics to be covered Definitions History Geosynchronous & Geostationary Application Advantages Disadvantages Solutions Bangabandhu - 1 Conclusions . Questions

3. 1. Definition of Satellite Artificial body Placed in orbit Rounding planet To collect data Two Types - Natural Moon Artificial Low Earth Orbit [180-200km] Medium Earth Orbit [2000-35786km] Geosynchronous orbit [35786km] High Earth Orbit [>35786km]

4. 1. Def. of Geosynchronous Satellite Satellite that in geosynchronous orbit Synced with earth rotation period [23 h 56 m 4.09s] Reach same place after 1 day Have inclination Orbital path observed as number 8 Example - Russian Raduga 29 Indian Astra 1C Malaysian MEASAT 2

5. 1. Geosynchronous Satellite Path

6. 2. History Father of geosynchronous satellite is Harold Rosen , an engineer at Hughes Aircraft Company First geosynchronous satellite Syncom 2 - launched July 26, 1963 As of October 2018, 446 active geosynchronous satellites Some of which are not operational

7. 3. Geostationary & Geosynchronous Special type of geosynchronous satellite Geosynchronous Satellite that - Circulating over equator Remains stationary relative to the Earth's surface Have not inclination Observed as stalled at fixed point Most communication satellite are geostationary

8. 3. Geostationary vs Geosynchronous Path

9. 4. Application Voice communication Internet Broadcasting cable TV and radio signals Weather forecasting Communicating back and forth with spacecraft Hubble Space Telescope Space Shuttles Geostationary satellites gives Detailed info of specific region Act as a spy satellite!

10. 5. Advantages Get high temporal resolution data. Tracking of satellite is simplified. Satellite always in same position. But geostationary satellites gives more Do not need to track such a satellite Less expensive than synchronous satellite Revolutionized global communications, broadcasting, forecasting Have importance at defense and intelligence applications.

11. 6. Disadvantages Incomplete geographical coverage Satellite dishes pointed towards the horizon The signals blocked by land topography, vegetation or buildings Geostationary satellites have signal delay approximately 0.25 of a second Difficulty of telephone conversation Reduces the performance of network protocols such as TCP/IP

12. 7. Solutions Special inclined path with elliptical orbits. e.g. Molniya / Orbita, Sirius Radio satellites Proprietary satellite data protocols that are partial solution to the poor performance of native TCP over satellite links. TCP presumes that all loss is due to congestion, not errors, and probes link capacity with its "slow-start" algorithm

13. 8. Bangabandhu 1 National pride. 1 st BD geostationary[geosynchronous] satellite Located at the 119.1° East longitude geostationary slot For communication & broadcasting 40 transponder [ 26 Ku band & 14 C band]

14. 8. Launching of Bangabandhu 1

15. 8. Coverage of Banfabandhu 1

16. 9. Conclusions Satellite in geosynchronous orbit [35786km] Round earth within 1 day Ease communication [sending, receiving] Rounding over equator are known as geostationary. Bangabandhu 1 is one of them! Observing geostationary as fixed while geosynchronous as moving

17. 10. Questions Do you have any question???

18. Thank You