ISRO chairman Radhakrishnan has thronged Tirumala and sought blessings of Sri Venkateshwara Swamy. Notably, this happens to be Radhakrishnan's second visit to Tirumala this month. Last week Radhakrishanan had a glimpse of the deity and prayed God for the success of PSLV-C21. Since the launch was successful, he visited the temple and thanked Lord Balaji. After coming out from temple, Radhakrishnana spoke to the media. He has said that G-SAT 10 satellite would be launched on September 22.