1981 मध्ये, ISRO ने भारताचा पहिला भूस्थिर उपग्रह प्रक्षेपित केला होता, ज्याचे नाव होते -

APPLE (Ariane Passenger Payload Experiment), launched on 19 June 1981 by an Ariane rocket from French Guiana, was ISRO's first experimental geostationary communication satellite. Aryabhata (1975) was India's first satellite, and the Bhaskara satellites were for Earth observation.