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Satellite sajith
- 2. • Satellite is any object that orbits another object: • It has wide range of mission Weather observation Military support Navigation Earth imaging SATELLITE
- 3. TYPES OF SATELLITE • Astronomical satellite: used for observing distant planet and galaxies • Communication satellite: used for telecommunication using radio at microwave frequencies • Earth observation satellite: specially designed for observing earth • Weather satellite : monitor the weather and climate of earth
- 4. TYPE OF ORBITS • Geo stationary orbits: it always positioned over same spot on earth(22,223 miles) • Asynchonoly orbit : they pass at overhead at different time of day (644 km) • Polar orbit : generally files at low attitude and pass over planet’s pole on each revolution
- 5. THE ROCKET • Rocket is a launching vehicle used to launch satellite in to required orbit.
- 6. STRAP ON ROCKET • 40 tones of hydraulic propellants • It burns before starting the main engine.
- 7. TYPES OF ROCKET • Expandable rocket : they destroyed while completing their mission. • Space shuttle: which is reusable
- 11. ROCKET ENGINE • It is a self propellant engine. • It carry fuel as well as oxidizer. • Efficiency is measured as specific impulse. sp: impulse = thrust produced /mass of propellant burnt in a second.
- 12. SOLID ENGINE
- 13. LIQUID ENGINE
- 14. MECHANISM OF ROCKET ENGINE Basic working principle is newton's 3rd low of motion Chemical reaction Feed pump Fuel tank Oxidizer Combustion chamber Nozzle
- 15. TYPES OF PROPELLANTS • Propellant is the chemical mixture burned to produce thrust in rockets and consists of a fuel and an oxidizer • Solid propellant: gun powder Zinc sulphur High energy composite propellants • Liquid propellant: LH2 LOH LNH3
- 16. LAUNCHING STAGES • Stage 1 • Stage 2 • Stage 3
- 17. STAGE 1 • Its travel 80 km • The maximum thrust is 4700 kN • Usually solid propellants are used • Max thrust are produced this stage • It split the 1st part of the rocket • 125 tone of propellants are used, 3.2m dia & 25m length in the stage
- 18. STAGE 2 • It travel 168 km • Maximum thrust produced is 720 kN • Usually liquid propellants are used N2O2 • 110 ton of fuels are used
- 19. STAGE 3 In this stage satellites are get in to transfer orbit 73.5kN thrust are produced Cryogenic engines are used Fuels are LOH & LH2 25 tones fuels are used and 8.2m in length When the rocket reaches T orbit, it must have been attain the orbital velocity of earth other vise it will return back to earth
- 20. APOGEE KICK MOTOR Satellite are safely suited in this motor Its also called the pay load firing During the end of third stage the motor will start firing and goes to required pallet
- 21. PROPULSION SUB SYSTEM • The challenges are faced by rocket launching • Thrust to weight ratio: it must be greater than 1 to take of the ground. • Nozzle design: nozzle face varying expansion condition from ground to space
- 22. THRUST TO WEIGHT RATIO • To get a rocket off the ground, the total thrust must be greater than the vehicles weight. • The launch vehicle’s prolusion system must produce a thrust to weight ratio greater than 1.0
- 23. COMMUNICATION & DATA HANDLING Through out launch the vehicle must stay in contact with a launch control center. The flight controller continuously monitor telemetry from the launch vehicle sub system to ensure they’re working properly The computer process sensor information and compute commands for actuators, as well as monitor other on board processes
- 24. Electric power Launch vehicle need only enough power to run the communication & data handling subsystem as well as sensor & actuators. In space uses fuel cell powered by hydrogen and oxygen. In expandable launch vehicle simple batteries are used for primary power. In satellite also have a battery for their working and its recharged by a solar power through solar panel.
- 26. Conclusion With the help of satellite any information sending instantly at any place. Various tasks such as mapping, locating, environmental situation, locating mineral deposits, finding crop problems etc. are performed by a satellite easily they are used in field of communication in the are of TV, the internet, the phones, observations, are of geology and navigation, in the area of transportation etc..