Wednesday, October 22, 2008

Chandrayaan-1 : The Flight Path

1: After liftoff, the spacecraft will be placed in an elliptical inertial orbit called GTO(Geosynchronous Transfer Orbit). GTO will be 240 km from the Earth at perigee and 36000 km from Earth at apogee.
2: After that the spacecraft will be taken to ETO(Earth Transfer Orbit). ETO is 73000 km from Earth at apogee.
3: From ETO, the spacecraft will be put into the LTT(Lunar Transfer Trajectory) and will move towards the moon. The maneuver will be performed by using the spacecraft's Liquid Apogee Motor(LAM).
4: Once in the vicinity of the moon, the LAM will be fired again to reduce the speed of the spacecraft sufficiently to enable the gravity of the moon to capture it into an elliptical orbit. This is called LOI (Lunar Insertion Maneuver).
5: After that the altitude of the spacecraft will be gradually reduced from around 1000 km and it will finally orbit moon at about 100 km above the moon.

Tuesday, October 21, 2008

Chandrayaan-I successfully launched

ISRO has successfully launched Chandrayaan-I at 6.22 am today from Satish Dhawan Space Centre. The spacecraft was carried by PSLV-C11 rocket. It has been successfully placed in the earth orbit. The spacecraft will take 15 days to reach the lunar orbit.
With the launch, India joined the elite club of moon faring nations -- the US, Russia, European Space Agency, China and Japan.