Friday, July 15, 2011

ISRO launches PSLV-C17/GSAT-12 Successfully


 ISRO successfully launched PSLV-C17 from Satish Dhawan Space Centre in Sriharikota on Friday at around 4.48pm.

We congratulates ISRO  for successful Launch. 


Polar Satellite Launch Vehicle (PSLV-C17), in its nineteenth flight, launches India's communication satellite GSAT-12 from the Second Launch Pad of Satish Dhawan Space Centre, SHAR, Sriharikota, India. PSLV-C17 measuring 44.5 m height, with a lift off weight of 320 tonnes has four stages of solid and liquid propulsion systems alternately. In its XL Version, PSLV-XL uses six extended solid strap-on motors wherein each strap-on carries 12 tonnes of solid propellant. This is a second time such a configuration is being flown, earlier one being the PSLV-C11/Chandrayaan-I mission.





Salient feature of PSLV-C17/GSAT-12 Mission:

  • For the first time, use of indigenously designed and developed On-Board computer (OBC) with Vikram 1601 processor in both primary and redundant chains of the vehicle. The OBC performs the functions of Navigation, Guidance and Control processing for the vehicle.
  • Use of extended solid strap-on configuration
  • Satellite injection in elliptical transfer orbit sub-Geosynchronous Transfer Orbit (GTO)
  • Five burn strategy (2 perigee burn and 3 apogee burn) for placing the GSAT-12 satellite from its sub-GTO to Geostationary Orbit

PSLV- C17 Stages at a Glance
STAGE-1
STAGE-2
STAGE-3
STAGE-4
Nomenclature
Core Stage(PSI) + 6 Strap-on Motors
PS2
PS3
PS4
Propellant
Solid
(HTPB Based)
Liquid
(UH25+N2O4)
Solid
(HTPB Based)
Liquid
(MMH + MON-3)
Mass (Tonne)
138.0 (Core) + 6 x 12.0 (Strap-on)
41.0
7.6
2.5
Max Thrust (kN)
4703 (Core)
6 x 670(Strap-on)
804
244
7.3 x 2
Burn Time (sec)
107 (Core)
55 (Strap-on)
151
116
510
Stage Dia (m)
2.8 (Core)
1.0 (Strap-on)
2.8
2.0
2.8
Stage Length  (m)
20 (Core)
14.7 (Strap-on)
12.8
3.6
2.6

For   Brochure click Here. 
Source: http://www.isro.gov.in