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  • Cybernetics  (1)
  • GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)  (1)
  • MECHANICS  (1)
  • SPACECRAFT INSTRUMENTATION  (1)
  • 1
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    Autonomous navigation and mobility for a planetary rover (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: This paper presents an overview of the onboard subsystems that will be used in guiding a planetary rover. Particular emphasis is placed on the planning and sensing systems and their associated costs, particularly in computation. Issues that will be used in evaluating trades between the navigation system and mobility system are also presented.
    Keywords: GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
    Type: AIAA PAPER 89-0859
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Stability constraints for line scanning cameras in orbit (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Requirements, parameters, and constraints influencing the design of a line scanner camera system for imaging from orbit are described. The driving requirements are the area of the site to be imaged in each pass and the resolution as determined by the size of a pixel projected on the planet surface. Allowable jitter and distortion, required SNR, maximum data rate, and maximum variation of the emission angle during imaging are among the constraints. Simplified equations incorporating these requirements, constraints, and parameters are developed and presented.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: AIAA PAPER 90-3517 , AIAA Guidance, Navigation and Control Conference; Aug 20, 1990 - Aug 22, 1990; Portland, OR; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Mission Operations with an Autonomous Agent (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Remote Agent (RA) is an Artificial Intelligence (AI) system which automates some of the tasks normally reserved for human mission operators and performs these tasks autonomously on-board the spacecraft. These tasks include activity generation, sequencing, spacecraft analysis, and failure recovery. The RA will be demonstrated as a flight experiment on Deep Space One (DSI), the first deep space mission of the NASA's New Millennium Program (NMP). As we moved from prototyping into actual flight code development and teamed with ground operators, we made several major extensions to the RA architecture to address the broader operational context in which PA would be used. These extensions support ground operators and the RA sharing a long-range mission profile with facilities for asynchronous ground updates; support ground operators monitoring and commanding the spacecraft at multiple levels of detail simultaneously; and enable ground operators to provide additional knowledge to the RA, such as parameter updates, model updates, and diagnostic information, without interfering with the activities of the RA or leaving the system in an inconsistent state. The resulting architecture supports incremental autonomy, in which a basic agent can be delivered early and then used in an increasingly autonomous manner over the lifetime of the mission. It also supports variable autonomy, as it enables ground operators to benefit from autonomy when L'@ey want it, but does not inhibit them from obtaining a detailed understanding and exercising tighter control when necessary. These issues are critical to the successful development and operation of autonomous spacecraft.
    Keywords: Cybernetics
    Type: RIACS-TR-98.08 , Autonomous Agents; Jan 01, 1998
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Attitude Control For The Cassini Spacecraft (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Report discusses design concepts for attitude control of Cassini spacecraft, scheduled to be launched in 1997 and to arrive at Saturn in 2004.
    Keywords: MECHANICS
    Type: NPO-19674 , NASA Tech Briefs (ISSN 0145-319X); 19; 11; P. 94
    Format: text
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    NASA TECHNICAL REPORTS
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