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five four three two one liftoff and the

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Titan 4 with its more spacecraft display

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in the late 1990s NASA is planning to

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conduct an unmanned mission to Mars its

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purpose is to collect soil samples for

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return to earth and to perform other

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scientific experiments this video

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depicts one possible scenario for the

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three-year mission two payloads are

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launched aboard to Titan for rockets

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upon arrival at Mars an arrow capture

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maneuver is used to place each payload

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into an elliptical orbit one payload

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contains a Mars rover and a Mars orbiter

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with an earth return vehicle the other

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payload contains a Mars ascent vehicle

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and an imaging and communications

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orbiter

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shortly after a circularization burn the

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asset vehicle separates from the imaging

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and communications orbiter performs an

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entry maneuver and descends to the

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Martian surface

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similar to the SM vehicle the Mars rover

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lands equipped with artificial

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intelligence and a stereo video camera

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it spends a year exploring the Martian

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surface during this time it transmits

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digital video images back to earth and

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when sampling operations are complete

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the rover is instructed to rendezvous

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with the a sent vehicle once there the

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sample canister is transferred the

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ascent vehicle then rotates to the

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vertical launch position and the rover

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departs to conduct further scientific

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studies ignition occurs and the boost

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module separates from its launch

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after an attitude maneuver the vehicle

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is placed in the same orbit as the Mars

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orbiter a radar scan is performed to

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upon acquisition of signals the orbiter

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performs a series of maneuvers to

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rendezvous and dock a docking complete

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signal initiates transfer of the sample

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the ascent vehicle then undocks to allow

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separation of the earth return vehicle

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the return vehicle performs an injection

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when thrust terminates the engines are

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jettisoned and solar arrays are deployed

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upon arrival at Earth the return vehicle

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deploys the earth aerocapture capsule

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during aerocapture friction from the

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Earth's atmosphere slows the capsule

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after aerocapture

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the aeroshell is detached and a burn is

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performed to place the vehicle in the

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the return vehicle is retrieved by a

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space station based orbital maneuvering

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vehicle the sample canister is

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quarantined at the station until it is