HELLOOOO,,THIS WILL HELP YOU A LOT

1. MADEBY–DEVESHIKAMBOJ
CLASS—V-F
RYAN INTERNATIONALSCHOOL

2.  ABOUT SATELLITE
 (SLIDE 4 –SLIDE 7) –ABOUT
ARTIFICIAL SATELLITE.
 LAUNCHING OF
SATELLITE
 HOW SATELLITE WORKS
 WATER FOUND ON MOON BY
ARTIFICIAL SATELLITE
INDEX

3. Satellite
 A Satellite is a solid object which revolves around some heavenly
body due to the effect of gravitational forces which are mutual in
nature. We can categorize satellites in two types, namely Passive
Satellites and Active satellites. A passive satellite can be further

subdivided into two types, namely Natural satellites and artificial
satellites. A moon is a natural satellite of earth. But spherical balloon
with metal coated plastic serve as artificial satellites.
Active satellites are complicated structures having a processing
equipment called Transponder which is very vital for functioning of
the satellite. These transponders serve dual purpose i.e. provides
amplification of the incoming signal and performs the frequency
translation of the incoming signal to avoid interference between the
two signals.

4. 1957
First Artificial Satellite
(Sputnik)
The first artificial satellite was
Sputnik 1, launched by the Soviet
Union on October 4, 1957. At about
the size of a basketball, Sputnik 1
was equipped with a radio
transmitter that gave off a beeping
signal—helping the Soviets to track
it on its 98- minute orbit and to
signal to the world that the U.S.S.R.
was the leader in space

5. 1960
Photograph courtesy
NOAA/NESDIS
Headquarters
First Orbiting Observations
(TIROS-1 Weather
Satellite)
The first aerial images of the
Earth from space were taken by
TIROS 1 (Television InfraRed
Observation Satellite). TIROS 1
was launched in 1960 to find out if
it was possible to watch cloud
cover and weather patterns from
space. Although it was an
experimental satellite, TIROS
images were immediately put to
use by meteorologists

6. 1972
First Surveying Satellite
(Landsat)
The first Landsat satellite was called
the Earth Resources Technology
Satellite, or ERTS. Since its launch on
July 23, 1972, six Landsats have
followed, with the latest, Landsat 7,
lifting off on April 15, 1999. Over the
years successive Landsats have not
only carried better land-viewing
sensors, but they have created a
valuable archive of images that are
being used to see how the land is
changing over the years. Landsat 7
carries the Enhanced Thematic
Mapper Plus, which scans the Earth in
eight bands of visible and invisible light

7. 1974
First Geostationary
Satellite (GOES)
Best known as weather satellites,
the first GOES (Geostationary
Operational Environmental Satellite)
was launched on October 16, 1975.
Their high orbits and visible-light and
infrared sensors allow for constant
surveillance of weather patterns over
the entire planet and have enabled
GOES to revolutionize the science of
weather prediction. GOES-10,
launched in 1998, images the 48
contiguous U.S. states every five
minutes.

8. Launching of Artificial Satellite
To enable a satellite to orbit around
any planet, we have to consider height
from which the satellite must be
thrown.
Consider yourself, if you throw a stone,
it comes to earth after some time,
why? It is because of the gravitational
attraction of earth and the stone. By
the Newton 's law of gravitation, stone
and earth would be attracted towards
each other by force

9. How Satellites Work
1. A Earth Station
sends message in
GHz range. (Uplink)
2. Satellite Receive and
retransmit signals
back. (Downlink)
3. Other Earth
Stations receive
message in
useful strength
area. (Footprint)

10. Water discovered on moon by an indian
satellite

11.  THANKS
AND
REGARDS