Launched in 1981 , it was the third of fifteen Intelsat V satellites to be launched .
Intelsat 503 , previously named Intelsat V F - 3 , was a communications satellite operated by Intelsat .
Launched in 1981 , it was the third of fifteen Intelsat V   satellites to be launched .
Intelsat 503 , previously named Intelsat V F - 3 , was a communications satellite operated by Intelsat .