Aerocapture Technology - 123SeminarsOnly

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The !V necessary to slow from a hyperbolic approach trajectory to a useful science orbit is !V = V phyp - V circ The rocket equation shows why aerocapture is so advantageous, masswise: For a propulsive capture, the mass increases exponentially with the !V; for aerocapture, the mass of the aeroshell is linear with !V. The <strong>Aerocapture</strong> Advantage Examples for Circular Orbit Insertion Mars Titan Venus Neptune Saturn 4
<strong>Aerocapture</strong>’s Advantages to Science • Advantage: greater delivered mass into orbit at the destination • It’s all about mass – more mass yields better science • More instruments, or higher-performance instruments • More mass for higher-performance subsystems that support the science • Power – for the instruments, and other support subsystems • Telecommunications – to downlink larger data volumes • Propulsion – to get the spacecraft to locations it wouldn’t access otherwise • Onboard data storage • Etc… • Structure – to hold all this together • Advantage: reduced trip times to distant destinations • Spend less time in the cruise phase, more in the science phase • Stay within the lifetimes of lifetime-limited components 5
Page 1 and 2: Aerocapture Technology www.nasa.gov
Page 3: Atmospheric Drag Reduces Orbit Peri
Page 7 and 8: Titan Aerocapture Systems Study Con
Page 9 and 10: Trajectory Simulations Include Real
Page 11 and 12: ! ! ! ! ! ! ! Titan Aerocapture Tec
Page 13 and 14: Example Monte Carlo Simulation Resu
Page 15 and 16: Total Heat Load (kJ/cm 2 ) 1.6 1.4
Page 17 and 18: ISPT’s Low-Risk Aeroshell Mass Im
Page 19 and 20: Power Supply Command & Telemetry Pr
Page 21 and 22: Destination Subsystem Atmosphere Go
Page 23 and 24: Resource Estimates for Aerocapture
Page 25: Aerocapture Development Summary •

Aerocapture Technology - 123SeminarsOnly

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