Vision and Voyages for Planetary Science in the - Solar System ...

Caching Mars Rover
SOURCE: NASA Mission Study (transmitted from Lisa May, NASA Planetary Science
Division)
Scientific Objectives
• Perform in situ science on Mars samples to look for
evidence of ancient life or pre‐biotic chemistry
• Collect, document, and package samples for future
collection and return to Earth
• Key science themes:
– The search for extant life on Mars
– The search for evidence of past life on Mars
– Understanding martian climate history
– Determination of the ages of geologic terrains on Mars
– Understanding surface‐atmosphere interactions on
Mars
– Understanding martian interior processes
Key Parameters
• Model Payload With Sampling/Caching System
– Pancam high resolution stereo imager (on mast)
– Near‐Infrared Point Spectrometer
– Microscopic Imager
– Alpha‐Particle X‐ray Spectrometer
– Dual Wavelength Raman/Fluorescence Instrument
– Sample Handling, Encapsulation, and Containerization
(arm, corer/abrader, organic blank, handling and
container system)
• Two x 2.2 m diameter Ultraflex solar arrays
• Launch Mass: 4457 kg
• Launch Date: 2018 (on Atlas V 531)
• Orbit: Type I transfer direct to Mars surface
– 15° S to 25° N latitude
Mars Astrobiology Explorer‐Cacher
Key Challenges
• Vehicle Capabilities Beyond Mars Science Laboratory
– Terrain‐relative descent navigation and precision
landing with pallet
– Aeroshell volume to accommodate MAX‐C, ExoMars,
and pallet
– Increased rover traverse speed over MSL and MER
• Sample Handling, Encapsulation, and Containerization
(SHEC)
– Lack of maturity in SHEC subsystem
– Affect of planetary protection and sample transfer
requirements
• Mass
– Insufficient mass growth contingency for this
development phase
– Low launch margin for this development phase
Key Cost Element Comparison
Cost Risk Analysis S‐Curve
PREPUBLICATION COPY—SUBJECT TO FURTHER EDITORIAL CORRECTION
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