Satellite different orbits and explanation by each scientist regarding the planetary motion.

1. SATELLITE AND IT ORBITS

2. CONTENTS
 SATELLITE
 TYPES OF SATELLITE
 HISTORY OF SATELLITE
 WORKING OF SATELLITE
 TYPES OF ORBITS
 EARTH PLANETARY MOTION
 KEPLERS LAW OF EARTH PLANETARY MOTION
 CONCLUSION

3. what’s mean by satellite ?
A Satellite is a solid object which revolves around some body due to the effect
of gravitational forces
Types of satellites :-
1) Passive satellites
2) Active satellites
Passive satellites :
A passive satellite only reflects received signals back to earth.
Ex. moon is a natural satellite of earth
Active satellites :
Active satellites are complicated structures having a processing equipment called
Transponder .
An active satellite acts as a REPEATER

4. History of Satellites
 First satellite that was used
for communication purpose
in INDIA was -
ARYABHATTA (19 April
1975)
 The first geostationary
communication satellite -
SYNCOM 3(19 Aug 1963).
 Father of geostationary
communication satellite is
-HAROLD ROSEN
(Aircraft engineer)
The world's first artificial satellite is the Sputnik 1
was launched in 1957

5. How Satellites Work :
I. A Earth Station
sends message in
GHz range (Uplink).
II. Satellite Receive
and retransmit
signals back.
(Downlink)
III. Difference between
Downlink and Uplink
frequency is
2 GHz.

6. TYPES OF ORBITS
Low-Earth-Orbit (LEOs)
Medium-Earth-Orbit (MEOs)
Geostationary ORBIT(GEOs)

7. LOW-EARTH-ORBIT (LEO)
Altitude (600-1000 KM)
 satellite gives it a better signal
strength
Advantages:
Reduces transmission
delay
Disadvantages:
Smaller coverage area.
Shorter life span (5-8 yrs.)

8. MIDDLE-EARTH-ORBIT (MEO)
MEOs orbits between the
altitudes of 8,000 - 20,000
km above the earth.
MEO satellites have a
larger coverage.
These orbits are primarily
reserved for communications
satellites that cover the North
and South Pole.
 MEOs are placed in an elliptical
(oval-shaped) orbit.

9. Geostationary-Earth-Orbit (GEO)
 From the ground level the
satellite appears fixed.
 GEO satellites have a 24 hour
view of a particular area.
 Coverage to 40% of area Of
planet by this satellite

10. Earth planetary motion

22. 686.971 earth days =
1.88 earth year

23. 23-Aug-19. 23
Communication satellites bring the world to you
anywhere and any time…..

24. BY
HEMANTH