|Mission duration||2 years, 3 months|
|Launch mass||350 kilograms (770 lb)|
|Start of mission|
|Launch date||19 June 1981|
|Launch site||Kourou ELA-1|
|End of mission|
|Deactivated||19 September 1983|
The Ariane Passenger PayLoad Experiment (APPLE), was an experimental communication satellite with a C-Band transponder launched by the Indian Space Research Organisation on June 19, 1981, by Ariane, a launch vehicle of the European Space Agency (ESA) from Centre Spatial Guyanais near Kourou in French Guiana.
APPLE was India's first three-axis stabilised experimental Geostationary communication satellite. On July 16, 1981, the satellite was positioned at 102° E longitude. The 672 kg satellite served as testbed of the Indian telecommunications space relay infrastructure despite the failure of one solar panel to deploy.
It was used in several communication experiments including relay of TV programmes and radio networking. It was a cylindrical spacecraft measuring 1.2 m in diameter and 1.2 m high. Its payload consisted of two 6/4 GHz transponders connected to a 0.9 m diameter parabolic antenna. It went out of service on September 19, 1983. R. M. Vasagam was the project director of APPLE during 1977-1983
|Mission||Experimental geostationary communication|
|Onboard Power||210 watts|
|Payload||C-band transponders (Two)|
|Launch Date||June 19, 1981|
|Launch Vehicle||Ariane -1(V-3)|
|Mission life||Two years|