Missions

XM-4

Mission Profile

From its equatorial launch site at 154 degrees West Longitude, a Zenit-3SL launch vehicle lifted the 5,193 kg (11,448 lbs.) XM-4 commercial DARS satellite to an optimized geosynchronous transfer orbit, on its way to a final orbital position of 115 degrees West Longitude, in support of XM's on-going service requirements.

Two-and-a-half minutes after liftoff, the first stage separated and then the payload fairing jettisoned. About five minutes later, the second stage separated from the Block DM upper stage. After the first burn of the Block DM engine, the spacecraft coasted for about 30 minutes. Following this coast, the Block DM made a second burn and then separate from the spacecraft about six minutes later, above the East coast of Africa.

 
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