Indian Space Research Organisation (ISRO) has attempted a unique experiment using the fourth stage of the PSLV-C56 rocket, bringing the upper stage down to a lower orbit after successfully launching seven Singaporean satellites on Sunday. After placing the Singaporean satellites in their intended orbit at an altitude of about 536 km, the fourth stage of the PSLV rocket was placed in a lower orbit to ensure its reduced orbital life at an altitude of about 300 km.
Two Singapore satellites have been successfully placed into their intended orbits by ISRO's Polar Satellite Launch Vehicle (PSLV) C55 on Saturday. The satellites were ordered by NewSpace India Ltd, the commercial arm of ISRO. The rocket, which stood at a height of 44.4 meters, launched at 2:19 pm as planned, after a 22.5-hour countdown, from the Satish Dhawan Space Centre in Sriharikota.