 The extra space was promised in 2009 on the GSAT-10 satellite, a then to be launched satellite inducted into the INSAT system.The GSAT-10 was launched in September 2012, Tata Sky has started utilising those transponders in March 2015.After the mission of INSAT-4A was over on 21 October 2019 Tata Sky started using ISRO's GSAT-10 satellite which is a replacement satellite of INSAT-4A.