Finally after a long time read CAG report on Management of Satellite Capacity for DTH.
Few important points found related to Tata Sky
Leasing of another foreign satellite Asiasat 7 in the orbital slot 83° was also
under active consideration of the ICC (July 2012). However, due to the strong views of MIB
against placement of a foreign satellite Asiasat 7 in the Indian orbital slot, it was ultimately
decided not to proceed with leasing of the foreign satellite
Tata Sky, the major non Government DTH service provider in the INSAT system
had also decided to move to a foreign satellite.