Original: Satellite of Earth Launch June 19, 1999 on a Titan 23G Launch site Vandenberg Air Force Base Mission duration 2 3 years Mass 971 kg (launch) Webpage winds.
Simplified: Satellite of Earth Launch June 19, 1999 on a Titan II Launch site Vandenberg Air Force Base Mission duration 2 3 years Mass 971 kg (launch) Webpage winds.