Here is thae small presentation of satellite working and a bries description of RISAT-2

1. RISAT-2
PRESENTED BY
V.Rama Krishna
14F01A04L3

2. CONTENTS
• What is Satellite
• Parts of Satellite
• How Satellite Works
• Ground Segment
• Satellite Frequency Bands
• RISAT-2

3. Satellite
 A satellite is a station in space that is
used for telecommunication, radio ,
television signals and several other
purposes.
 Satellite is broadly classified in two
category:
• Passive Satellite
• Active Satellite
And active satellite further classified as
• Non-GEO Satellite (in LEO,MEO etc.)
• GEO Satellite (in Geo Stationary orbit)

4. Parts of Satellite

5. How Satellites Work :
A Earth Station sends
message in the form of
signal in GHz range
(Uplink).
Satellite Receive the signal
and after processing by
transponder, it retransmit
signals back. (Downlink).
4 GHz 6 GHz

6. Ground Segment
• The ground segment consists of
– Earth Stations
– User terminals & interfaces
– Network control centre
– Transmit equipment.
– Receive equipment.
– Antenna system.

7. Satellite Frequency Bands :
• Most of the satellites works in Super high frequency range but
with different frequency bands.
• L–Band: 1 to 2 GHz,
• S-Band: 2 to 4 GHz
• C-Band: 4 to 8 GHz
• X-Band: 8 to 13 GHz
• Ku-Band: 12 to 18 GHz
• K-Band: 18 to 28 GHz
• Ka-Band: 28 to 40 GHz

8. RISAT-2
• RISAT-2, or Radar Imaging Satellite 2 is an Indian radar reconnaissance satellite ,
that is part of India's RISAT programme.
• It was built by Israel Aerospace Industries.
• It was launched from the Second Launch Pad at the Satish Dhawan Space Centre.
• Media classified it as a spy satellite.
• ISRO's website claims that the satellite will enhance ISRO's capability for earth
observation, especially during floods, cyclones, landslides and in disaster
management in a more effective way.
• In a significant deviation, India's state television Doordarshan, did not telecast the
launch live.

9. Mission type Radar imaging
Operator Indian Air Force ISRO
COSPAR ID 2009-019A
SATCAT NO 34807
Website www.isro.gov.in/Spacecraft/risat-2
Spacecraft properties
Manufacturer ISRO IAI
Launch mass 300 kilograms (660 lb)
Start of mission
Launch date 20 April 2009, 01:15 UTC
Rocket PSLV-CA C12
Launch site SIRHARIKOTA (SRI)

10. RISAT-2 is India's first heavy satellite with a synthetic aperture radar .
It has a day-night, all-weather monitoring capability.
 Potential applications include tracking hostile ships at sea that could
pose a military threat.
RISAT-2 was used to search for the wreckage of the helicopter crash
in the dense jungles of Andhra Pradesh on Sep 2, 2009. The crash
killed Y. S. Rajasekhara Reddy, Chief Minister of the Indian state of
Andhra Pradesh, who was travelling aboard the helicopter.