X-Sat is a microsatellite developed and built by the Nanyang Technological University (NTU) in collaboration with Defence Science Organisation (DSO) Singapore. The satellite was launched by ISRO's PSLV-C16 on 20 April 2011 from Satish Dhawan Space Centre FLP in Sriharikota, India. The satellite was launched along with Indian ResourceSat-2 and Indo-Russian YouthSat.
- Suryanarayana, P. S. (20 April 2011). "Singapore delighted at ISRO's launch of X-Sat". The Hindu. Chennai, India.
- T.S., Subramanian (19 April 2011). "PSLV-C16 launch today". The Hindu. Chennai, India. Archived from the original on 3 May 2011. Retrieved 19 April 2011.