1981 में, ISRO ने भारत का प्रथम भू-स्थायी उपग्रह प्रक्षेपित किया, जिसे क्या कहा गया है?

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.