The test follows a comprehensive review and strengthening of the stage's configuration after anomalies were observed during the PSLV-C61/EOS-09 and PSLV-C62/EOS-N1 missions. Sriharikota, Andhra Pradesh: The Indian Space Research Organisation (ISRO) on Thursday successfully conducted a ground static test of the third stage (PS3) of its Polar Satellite Launch Vehicle (PSLV) at the Static Test Facility of the Satish Dhawan Space Centre in Sriharikota.