The 630 kg (1386 lbm) AMSAT Oscar 40 (known as AMSAT Phase 3D up until launch) is the largest amateur radio satellite built to date. It will be placed in an elliptical orbit of 4,000 km by 47,700 km, having an inclination of 63 degrees. AMSAT Oscar 40 carries five radio receivers and eight transmitters, as well as a complement of experiments and experimental propulsion systems. It is expected to have a life of 10 years. At the beginning of its life it is expected to generate 620 watts of power. The Organization for Amateur Radio Satellites (AMSAT) project involved HAM radio operators from Belgium, Finland, Germany, Great Britain, Hungary, South Africa, and the United States. AMSAT Deutschland was the satellite prime contractor. The stowed dimensions of the satellite are 2.23 m x 2.23 m x .68 m.