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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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Micro Raman Spectroscopy for Characterizing Molecular Contamination on Space Flight Hardware
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Alignment of the MAM testbed to enable micro-arcsecond astrometry performance for SIM
This paper describes the MAM optical setup, the alignment process, the contribution of the fine alignment to the final performance and how they relate to SIM.
Micro-Precision Interferometer: Pointing System Solutions for On-orbit Disturbance Environment
We predict the contribution to the on-orbit residual tip-tilt performance due to the reaction wheel disturbance, for different isolater and closed loop optics configurations for the Space Interferometer Mission (SIM).
Design and fabrication of a micro-ion engine
This article describes the configuration of the discharge chamber and design and fabrication of the grids and field emission array (FEA) cathodes.
Fuzzy Reactive Piloting for Continuous Driving of Long Range Autonomous Planetary Micro-Rovers
A complete piloting control subsystem for a highly autonomous long range rover will be defined in order to identify the key control functions needed to achieve continuous driving that maximizes the range and number of interesting scientific sites visited during the limited life time of a planetary rover.
Micro-Precision Interferometer: Pointing System Performance in On-orbit Disturbance Environment
We investigate how the Space Interferometry Mission (SIM) will be able to meet its instrument astrometric pointing requirements.
Free Flying Magnetometers As a Demonstration of Micro-Spacecraft Technologies
Four Free Flying Magnetometers (FFMs) flew on the Enstrophy sounding rocket launched on February 10, 1999 from Poker Flats Research Range.
Microinstruments and Micro Electromechanical Systems in Support of Earth and Space Science in the New Millenium
NASA's New Millenium Program (NMP) has been chartered with flight validation of next generation technology to demonstrate the feasibility of pursuing unmanned space science with low cost, miniature spacecraft and probes. In defining a roadmap for instrument development, primary emphasis has been placed on system concepts which take best advantage of instrument miniaturization. In this paper the
Evaluation of Mode Shape Expansion Techniquies on the Micro-Precision Interferometer Truss
Several methods for mode shape expansion are investigated. In the first, the dynamic equations of motions are used to obtain direct solutions to the expanded eigenvectors. It is shown that these methods can be interpreted as constrained optimization problems.
Micro-Sensor Networks
The concept of an all-fiber, IC-based sensor network is presented. Fundamental issues including topology tradeoffs, power budget, and power distribution subsystem are analyzed. Some potential applications of such sensor networks are discussed.
Micro Weather Stations for Mars
A global network of weather stations will be needed to characterize the near-surface environment on Mars.
Integrated Modeling Methodology Validation Using the Micro-Precision Interferometer Testbed
This paper validates the integrated modeling methodology used for design and performance evaluation of complex opto-mechanical systems, particularly spaceborne interferometers. The methodology integrates structural modeling, optical modeling, and control system design into a common environment, the Integrated Modeling of Optical Systems (IMOS) software package.
Integrated Modeling Methodology Validation Using the Micro-Precision Interferometer Testbed: Assessment of Closed Loop Performance Prediction Capability
This paper validates the integrated modeling methodology used for design and performance evaluation of complex opto-mechanical systems, particularly spaceborne interferometers.
The dependence of the Micro-Arcsecond Metrology (MAM) testbed performance prediction on white light algorithm approach
This paper will compare the performance of various algorithms using the MAM data, and will aid in our recommendation of how the SIM flight system should process the science and guide interferometer data.
Metrology for the Micro-Arcsecond Metrology Testbed
The Space Interferometry Mission (SIM) relies on the combination of interferometry with a metrology system capable of measureing picometer relative length changes and micrometer absolute lengths.