Chandrayaan-1, India’s maiden moon spacecraft, was on Wednesday put into Transfer Orbit around the earth by the Polar Launch Vehicle PSLVC11 about 19 minutes after it blasted off from the Satish Dhawan Space Centre he.
The 1,380 kg Chandrayaan-1, carrying 11 payloads, was released into a Tansfer Orbit at a perigee (nearest point to earth) of about 250 km and apogee (farthest point from the earth) of about 23,000 km, 18.2 minutes after the PSLV-C11 blasted off as the scientists broke into jubilation at the mission control centre
After a series of procedures over the next two weeks, the spacecraft would reach its desired Lunar orbit and placed at a height of 100 km from the Lunar surface, marking the operational phase of the mission which would put India in the elite lunar club.
Earlier, at the end of the 49-hour countdown, the 44.4 meter tall four-stage PSLV-11 lifted off from the second launch pad into a cloudy sky.
This is the 14th flight of ISRO’s workhorse PSLV, which had launched 29 satellites into a variety of orbits since 1993, and 13th successive one in a row.
Chandrayaan-1 is carrying 11 payloads, five entirely designed and developed in India, three from European Space Agency, one from Bulgaria and two from US, which would explore the Moon over the next two years.
“It is a historic moment as far as India is concerned. We have started our journey for the moon and the first leg of the journey has gone perfectly well,” Nair said seconds after the successful completion of the launch.
“It is a remarkable performance by the launch vehicle,” he said.
It is a perfect launch. Now it will be orbiting the earth, he said, adding that today “what we have started is a remarkable journey for the Indian spacecraft to go to the moon and try to unravel the mysteries of the moon”.
“We have been fighting against all odds,” the noted scientist said explaining that heavy rains and cloudy skies over the last four days had led to a lot of worries about the launch.
“Fortunately, we had clear skies today and we would be completing the remaining part of the journey within 15 days,” Nair said.
Indian Space Research Organisation Chairman G Madhavan Nair described the successful launch as a historic moment in India’s space programme.
“The launch was perfect and precise. The satellite has been placed in the earth orbit. With this, we have completed the first leg of the mission and it will take 15 days to reach the lunar orbit,” Nair announced in the mission control centre shortly after PSLV-C11 put the spacecraft in a transfer orbit.
After circling the earth in its highly elliptical Transfer Orbit for a while, Chandrayaan-1 would be taken into more elliptical orbits by repeated firing of the spacecraft’s Liquid Apogee Motor (LAM) at opportune moments.
Subsequently, the LAM would be again fired to take the spacecraft to the vicinity of the moon by following a Lunar Transfer Trajectory (LTT) path, whose apogee lies at 3,87,000 km.
Later, when Chandrayaan-1 reaches the vicinity of the moon, its LAM would be fired again so as to slow down the spacecraft sufficiently to enable the gravity of the moon to capture it into an elliptical orbit. The next step would be to reduce the height of the spacecraft orbit around the moon in various steps.
After some more procedures, Chandrayaan-1’s orbit would be finally lowered to its intended 100 km height from the lunar surface, which was expected to take place around November 8.
Later, the Moon Impact Probe would be ejected from Chandrayaan-1 in a chosen area following which the cameras and other payloads would be turned on and thoroughly tested, marking the operational phase of the mission.
RSS Feed
Twitter
Posted in 
Tags: 
