CHENNAI: The Indian space odyssey crossed a historic landmark on Sunday when a Polar Satellite Launch Vehicle ( PSLV-C21 ) put in orbit two foreign satellites.

It marked the 100th space mission of the Indian Space Research Organisation ( Isro ) which started the journey in 1975 with the launch of its first satellite 'Aryabhata.'

Among those who watched the majestic rocket lift off from the Satish Dhawan Space Centre in Sriharikota, 100km north of Chennai, was Prime Minister Manmohan Singh .

At the end of a 51-hour countdown that started on Friday, PSLV-C21 lifted off at 9.53am. After 17 minutes and 49 seconds, it injected the first satellite, the French SPOT-6, into orbit. Soon, the second satellite, the Japenese Proiteres was put in orbit. There were, however, some anxious moments when the trajectory on the giant screens at the mission control room showed the rocket's blip deviate slightly midflight, which appeared to have been corrected later.

Scientists cheered and shook hands as the mission was pronounced a success and the Prime Minister congratulated the scientists. "India is justly proud of its space scientists who have overcome many odds to develop our own technology for space missions," he said.

It was PSLV's 21st consecutively successful flight. PSLV-C21 is India's 38th satellite launch vehicle to lift off from Sriharikota. India has so far put in orbit 62 Indian satellites. The two numbers add up the century that Isro celebrated on Sunday.

Besides buttressing its technological mastery, Isro, with its latest launch, has cemented its place in among the space-faring nations as a sought-after commercial launcher. Isro's commercial arm Antrix Corporation has received several requests from foreign countries to launch their satellites for a price.

