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There are a total of 1031821 record(s) matching your query.
Sorted by: Date Added To NTRS in Ascending order
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The MSP 2001 Mars Environmental Compatibility Assessment (MECA)
Author(s): Hecht, M. H.; Meloy, T. P.; Anderson, M. S.; Buehler, M. G.; Frant, M. A.; Grannan, S. M.; Fuerstenau, S. D.; Keller, H. U.; Markiewicz, W. J.; Marshall, J., et al.
Abstract: A chemical analysis of soil-water mixtures and the first microscopic images of martian soil will be among the results to be returned by the Mars Environmental Compatibility Assessment (MECA) payload on the Mars Surveyor ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1999
Added to NTRS: 2004-09-16
Document ID: 20000110352
Release of Implanted Noble Gases from Metallic Glass Vitreloy During Pyrolysis
Author(s): Meshik, A. P.; Hohenberg, C. M.; Burnett, D. S.; Woolum, D. S.
Abstract: Vitreloy, a metallic vitreous glass, was examined as a potential target material for the Genesis Mission solar wind collector. Stepped pyrolysis revealed that He and Ne implanted in Vitreloy were efficiently re-trapped ...
NASA Center: Goddard Space Flight Center
Publication Year: 2000
Added to NTRS: 2004-09-16
Document ID: 20000081236
Atmospheric Entry Heating of Micrometeorites Revisited: Higher Temperatures and Potential Biases
Author(s): Love, S.; Alexander, C. M. OD.
Abstract: The atmospheric entry heating model of Love and Brownlee appears to have overestimated evaporation rates by as much as two orders of magnitude. Here we revisit the issue of atmospheric entry heating, using a revised ...
NASA Center: Johnson Space Center
Publication Year: 2001
Added to NTRS: 2004-09-16
Document ID: 20010044996
Martian Polar Impact Craters: A Preliminary Assessment Using Mars Orbiter Laser Altimeter (MOLA)
Author(s): Sakimoto, S. E. H.; Garvin, J. B.
Abstract: Our knowledge of the age of the layered polar deposits and their activity in the volatile cycling and climate history of Mars is based to a large extent on their apparent ages as determined from crater counts. Interpretation ...
NASA Center: Goddard Space Flight Center
Publication Year: 1999
Added to NTRS: 2004-09-16
Document ID: 20000110452
Halide Minerals in the Monahans (1998) and Zag H Chondrite Regolith Breccias
Author(s): Zolensky, M. E.; Bodnar, R. J.; Schwandt, C.; Yang, S. Vincent
Abstract: Description of halide minerals in H chondrites.
NASA Center: Johnson Space Center
Publication Year: 2000
Added to NTRS: 2004-09-16
Document ID: 20000081223
Characterization of Structures and Compositions of Quadrilateral Pyroxenes by Raman Spectroscopy - Implications for Future Planetary Exploration
Author(s): Wang, A.; Jolliff, Bradley L.; Haskin, Larry A.; Kuebler, K. E.
Abstract: Raman spectral data are used to distinguish the major structure types and to calculate the major compositional parameters (Mg' and Wo) of quadrilateral pyroxenes. The discrepancies between calculated and measured values are ...
NASA Center: Goddard Space Flight Center
Publication Year: 2000
Added to NTRS: 2004-09-16
Document ID: 20000081289
Multiple Emission Angle Surface-Atmosphere Separations of MGS Thermal Emission Spectrometer Data
Author(s): Bandfield, J. L.; Smith, M. D.
Abstract: Multiple emission angle observations taken by MGS-TES have been used to derive atmospheric opacities and surface temperatures and emissivities with increased accuracy and wavelength coverage. Martian high albedo region ...
NASA Center: Goddard Space Flight Center
Publication Year: 2001
Added to NTRS: 2004-09-16
Document ID: 20010045017
Sayama CM2 Chondrite: Fresh but Heavily Altered
Author(s): Takaoka, N.; Nakamura, T.; Noguchi, T.; Tonui, E.; Gounelle, M.; Zolensky, M. E.; Ebisawa, N.; Osawa, T.; Okazaki, R.; Nagao, K.; Yoneda, S.
Abstract: Noble gas composition and mineralogy of Sayama meteorite, that fell in Japan and recently identified as a CM2 chondrite, revealed many unique features, indicating that it experienced extensive aqueous alteration under highly ...
NASA Center: Johnson Space Center
Publication Year: 2001
Added to NTRS: 2004-09-16
Document ID: 20010044797
A Phase Angle Study of MUSES-C Target 25143 (1998 SF36)
Author(s): Lederer, S. M.; Domingue, D.; Jarvis, K. S.; Larson, S. M.; Vilas, F.; French, L. M.
Abstract: We have conducted an extensive observing campaign to characterize asteroid 25143 (1998 SF36), the current target of the MUSES-C Japanese mission designed to rendezvous with and sample an NEA. We are employing a Hapke model ...
NASA Center: Johnson Space Center
Publication Year: 2002
Added to NTRS: 2004-09-16
Document ID: 20020046480
JSC Curation and Future Sample Return Missions
Author(s): Cyr, K. E.
Abstract: Johnson Space Center is the NASA center charged with curation of extraterrestrial samples, and is currently participating on several missions. Our experience shows that curation efforts need to start early, during mission ...
NASA Center: Johnson Space Center
Publication Year: 2001
Added to NTRS: 2004-09-16
Document ID: 20010045079
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