ISRO scientists to perform unique experiment in PSLV-C56 mission launched
According to ISRO, after injecting all the Singapore satellites into the intended orbit at an altitude of about 536 km, the upper stage of the rocket will be placed in lower orbit to ensure its reduced orbital life at an altitude of about 300 km, ISRO said.
PS4 will be de-orbited to Low Earth circular orbit in a 300x300 km, using left out propellants to reduce orbital life of spent PS4 stage. (Image credit: ISRO)