Satellite services
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This document provides an overview of satellite services. It discusses how satellites work, orbiting the earth to collect and transmit information via different frequency bands. Satellites are important for research, collecting data, global positioning, weather prediction, tracing vehicles, and controlling systems. The history of satellites is reviewed, from early theories to the first satellites launched in 1957.
Satellite services
- 1. ProjectProject onon Satellite ServicesSatellite Services Created by Created by Razi AhmedRazi Ahmed
- 3. Satellites OverviewSatellites Overview IntroductionIntroduction HistoryHistory How Satellites WorkHow Satellites Work Satellite Frequency Bands and AntennasSatellite Frequency Bands and Antennas Why are Satellite ImportantWhy are Satellite Important
- 4. What is Satellite ?What is Satellite ? An artificial body placed in orbit around theAn artificial body placed in orbit around the earth or another planet in order to collectearth or another planet in order to collect information or for communicationinformation or for communication
- 5. History of SatellitesHistory of Satellites The First Satellites The theory of satellites was simple enough - shoot something out into space at the right speed and on the correct trajectory and it will stay up there, orbiting Earth, for years - if not forever. If the orbit is the right distance in space the satellite will keep pace with the rotation of the Earth. Pioneer Satellites (1957) Early in October 1957 communications stations started picking up a regular beeping noise coming from space. It was January 1958, before a Jupiter rocket successfully launched Explorer 1, the first American satellite.
- 6. Why are Satellite Important ?Why are Satellite Important ? To ResearchTo Research To Collect InformationTo Collect Information To Global PositioningTo Global Positioning To Weather predictionTo Weather prediction TracingTracing ControllingControlling
- 8. Collect Information By SatelliteCollect Information By Satellite
- 10. Prediction of WeatherPrediction of Weather
- 11. Tracing of VehicleTracing of Vehicle
- 12. 3 June 20083 June 2008 ControllingControlling
- 13. How Satellites WorkHow Satellites Work 1.1. A Earth Station sendsA Earth Station sends message in GHz range.message in GHz range. (Uplink)(Uplink) 2.2. Satellite Receive andSatellite Receive and retransmit signals back.retransmit signals back. (Downlink)(Downlink) 3.3. Other Earth StationsOther Earth Stations receive message inreceive message in useful strength area.useful strength area. (Footprint)(Footprint)
- 14. base station or gateway Satellite SystemsSatellite Systems Inter Satellite Link (ISL) Mobile User Link (MUL) Gateway Link (GWL) footprint User data PSTNISDN GSM GWL MUL PSTN: Public Switched Telephone Network
- 15. Satellite Frequency BandsSatellite Frequency Bands and Antennas (Dishes)and Antennas (Dishes) C-BandC-Band Ku-BandKu-Band Most commonly used bands:Most commonly used bands: C-bandC-band (4 to 8 GHz)(4 to 8 GHz) , Ku-, Ku- bandband (11 to 17 GHz) , and Ka-band (20 to 30 GHz ).(11 to 17 GHz) , and Ka-band (20 to 30 GHz ).
- 16. Resources of DataResources of Data WikipediaWikipedia GoogleGoogle Google ImageGoogle Image Yahoo AnswerYahoo Answer