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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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This paper presents a technique for learning to assess terrain traversability for outdoor mobile robot navigation using human-embedded logic and real-time perception of terrain features extracted from image data.
The focus of this paper is the interaction of the aided-navigation system with the rest of the flight system. Results from simulated EDL scenarios will be presented.
This paper describes the navigation strategy and results for the rendezvous and orbit phases of the NEAR mission.
This paper presents a novel technique for real-time measurement of terrain characteristics and incorporation of this information into the navigation strategy of an autonomous mobile robot.
The first mission of NASA's New Millenium Program, Deep Space 1, has, as one of its principal demonstration technologies, the first autonomous optical navigation system to be used in deep space.
The first mission of NASA's New Millennium Program, Deep Space 1, has, as one of its principal demonstration-technologies, the first autonomous optical navigation system to be used in deep space.
Precision clocks and frequency standards are widely used in communications and navigations systems.
This paper surveys key progress in sensors, algorithms, and processors that has alleviated these specific barriers, thereby enabling practical autonomous navigation.
This paper describes navigation results obtained in the field tests and shows that accurated heading estimation provides a significant improvement over previous results.
A description is given of the operational JPL project to measure, combine, and predict Earth rotation parameters in support of spacecraft navigation.
Several options are being examined to reduce the costs of spacecraft and deep space missions. One such option is to fly spacecraft in a non-coherent mode, that is, the spacecraft does not carry a transponder and cannot coherently return a Doppler signal. Historically, such one-way data has not been used as the sole data type due to the instability of the onboard oscillator, the use of S-band frequencies, and the corresponding larger error sources which could not be modeled. However, with the advent of high-speed work stations and more sophisticated modeling ability, the possibility of using one-way data is being re-examined. This paper addresses the navigation performance of various one-way data types for use in interplanetary missions.
This paper provides an in-depth review of the Mars Observer Navigation Team's activities throughout interplanetary cruise to Mars and our response to the spacecraft's anomaly which occurred approximately 68 hours before encounter.
We investigate the application of conditional sequencing to robot navigation.
Developing cost efficient individual flight projects that perform both orbital and surface exploraton will likely require intelligent infrastructure elements for critical functions such as navigation.
Recent scientific discoveries at Mars have heralded an unprecedented commitment and focus by NASA and its international partners toward further exploration of Mars. As part of this effort NASA has an on-going project, called the Mars Network, to examine communication and navigation infrastructure requirements needed to support Mars exploration.
This chapter describes fundamental research aimed at achieving such long-term objectives through application of soft computing techniques for safe and reliable autonomous rover navigation.
The Galileo spacecraft's navigation results for the first eleve Jupiter satellite encounters are described.
The impact of using altimeter range measurements as an observation type for navigation of spacecraft about small bodies is evaluated.