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  • 1
    Publication Date: 2019-08-14
    Description: NASA has been analyzing a number of mission concepts and activities that involve low-latency telerobotic (LLT) operations. One mission concept that will be covered in this presentation is Crew-Assisted Sample Return which involves the crew acquiring samples (1) that have already been delivered to space, and or acquiring samples via LLT from orbit to a planetary surface and then launching the samples to space to be captured in space and then returned to the earth with the crew. Both versions of have key roles for low-latency teleoperations. More broadly, the NASA Evolvable Mars Campaign is exploring a number of other activities that involve LLT, such as: (a) human asteroid missions, (b) PhobosDeimos missions, (c) Mars human landing site reconnaissance and site preparation, and (d) Mars sample handling and analysis. Many of these activities could be conducted from Mars orbit and also with the crew on the Mars surface remotely operating assets elsewhere on the surface, e.g. for exploring Mars special regions and or teleoperating a sample analysis laboratory both of which may help address planetary protection concerns. The operational and technology implications of low-latency teleoperations will be explored, including discussion of relevant items in the NASA Technology Roadmap and also how previously deployed robotic assets from any source could subsequently be used by astronauts via LLT.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN23785 , SpaceOps 2015 Workshop; Jun 10, 2015 - Jun 12, 2015; Rome; Italy
    Format: application/pdf
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  • 2
    Publication Date: 2019-07-13
    Description: Solar Electric Propulsion (SEP) offers fuel efficiency and mission robustness for spacecraft. The combination of solar power and electric propulsion engines is currently used for missions ranging from geostationary stationkeeping to deep space science because of these benefits. Both solar power and electric propulsion technologies have progressed to the point where higher electric power systems can be considered, making substantial cargo missions and potentially human missions viable. This paper evaluates and compares representative lunar, Mars, and Sun-Earth Langrangian point missions using SEP and chemical propulsion subsystems. The potential benefits and limitations are discussed along with technology gaps that need to be resolved for such missions to become possible. The connection to NASA's human architecture and technology development efforts will be discussed.
    Keywords: Spacecraft Propulsion and Power
    Type: IAC-15-D1.4.3 , GRC-E-DAA-TN26989 , International Astronautical Congress (IAC 2015); Oct 12, 2015 - Oct 16, 2015; Jerusalem; Israel
    Format: application/pdf
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  • 3
    Publication Date: 2019-07-13
    Description: Recent NASA interest in human missions to Mars has led to an Evolvable Mars Campaign by the agency's Human Architecture Team. Delivering the crew return propulsion stages and Mars surface landers, SEP based systems are employed because of their high specific impulse characteristics enabling missions requiring less propellant although with longer transfer times. The Earth departure trajectories start from an SLS launch vehicle delivery orbit and are spiral shaped because of the low SEP thrust. Previous studies have led to interest in assessing the divide in trip time between the Earth departure and interplanetary legs of the mission for a representative SEP cargo vehicle.
    Keywords: Spacecraft Propulsion and Power; Astrodynamics
    Type: GRC-E-DAA-TN29388 , AAS/AIAA Space Flight Mechanics Meeting; Feb 14, 2016 - Feb 18, 2016; Napa, CA; United States
    Format: application/pdf
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