The Virtual Classroom Technology
on EDUSAT for Rural Schools (VICTERS) programme is a Rs.120
crore IT@School Project's of Kerala State Government, which
is for harness the satellite for teacher training programmes,
providing high speed net connectivity to schools and for
implementing learning management solutions.
There is 15 designated centres with satellite interactive
terminals (SIT) would link up with the C-DIT studio at Gorkhy
students would be present at each of these centres. The
link-up at all the 15 centres would be managed by the master
trainers of the IT@School programme.
will provide the space segment for EDUSAT System and demonstrate
the efficacy of the satellite system for interactive distance
EDUSAT is the first exclusive satellite for serving the
educational sector. It is specially configured for audio-visual
medium, employing digital interactive classroom and multimedia
multicentric system. The satellite will have multiple regional
beams covering different parts of India
lower Ku-band transponders for spot beam coverage with 55
dBW Edge of Coverage-Effective Isotropic Radiated Power
(EOC-EIRP) One lower Ku-band transponder for national coverage
with 50 dBW EOC-EIRP Six upper extended C-band transponders
for national coverage with 37 dBW EOC-EIRP One Ku-band beacon
to help ground users for accurate antenna pointing and uplink
prime objective of ISRO has been to develop space technology
and its application to various national tasks. Since 1969,
when it was set up, ISRO has established space systems like
the INSAT for telecommunication, television broadcasting
and meteorological services, and the Indian Remote Sensing
Satellites (IRS) for resources monitoring and management.
ISRO has also developed the satellite launch vehicles PSLV
and GSLV to place these satellites in the required orbits.
will be launched by the third flight of ISRO’s Geosynchronous
Satellite Launch Vehicle. Designated as GSLV-F01, this is
the first operational flight of the vehicle. In its two
developmental test flights conducted in April 2001 and May
2003 respectively, GSLV successfully launched GSAT-1 and
GSAT-2 satellites into Geosynchronous Transfer Orbits (GTOs).
In the first developmental test flight (GSLV-D1), the vehicle
placed 1530 kg GSAT-1 into GTO and in the second developmental
test flight (GSLV-D2), it placed 1825 kg GSAT-2 into GTO.
In its first operational flight (GSLV-F01), GSLV will launch
the 1950 kg EDUSAT.
49 metre tall GSLV is a three stage vehicle. The first stage,
GS1, comprises a core motor with 138 tonne of solid propellant
and four strap-on motors each with 40 tonne of hypergolic
liquid propellants (UH25 and N204). The second stage has
39 tonne of the same hypergolic liquid propellants. The
third stage (GS3) is a cryogenic stage with 12.5 tonne of
Liquid Oxygen and Liquid Hydrogen.
Aluminum alloy GSLV payload fairing is 3.4 m in diameter
and is 7.8 m long. GSLV employs various separation systems
such as Flexible Linear Shaped Charge (FLSC) for the first
stage, pyro actuated collet release mechanism for second
stage and Merman band bolt cutter separation mechanism for
the third stage. Spacecraft separation is by spring thrusters
mounted at the separation interface. The three-axis attitude
stabilisation of GSLV is achieved by autonomous control
systems provided in each stage. Single plane Engine Gimbal
Control (EGC) of the four strap-ons of the first stage are
used for pitch, yaw and roll control. The second stage has
Engine Gimbal Control (EGC) for pitch and yaw and hot gas
Reaction Control System (RCS) for roll control. Two swivellable
vernier engines using LH2 and LOX provide pitch, yaw and
roll control for the third stage during thrust phase and
cold gas system during coast phase. The Inertial Guidance
System (IGS) in the Equipment Bay (EB) housed above the
third stage guides the vehicle till spacecraft injection.
The closed loop guidance scheme resident in the on-board
computer ensures the required accuracy in the injection
For more details, please visit: www.isro.org