Indian Space Research Organisation presently has 175 transponders in a mix of C, Extended-C, Ku and S bands and has taken on lease 86 and half foreign transponders but faced a huge order book position.
At the beginning of the 11th plan in April 2007, ISRO had 211 transponders and the goal then was to take it about 500 by March 2012 but a combination of unsuccessful missions, premature terminations and some satellites entering the end of their normal life led to it ending up way below the mark.
ISRO sources said the required demand now is about 200 transponders in all and it's scouting to meet that demand by acquiring more foreign transponders for a short period till its own new satellites are launched and become operational.
ISRO Chairman K Radhakrishnan said the Indian space agency is also exploring "if we could get a (in-orbit) foreign satellite moved into our (designated, orbital) slots for a short period.
"We have got several orbital slots. We could go up to 320 transponders," he told a press conference.