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  • Spacecraft Design, Testing and Performance  (10)
  • Lunar and Planetary Science and Exploration  (4)
  • *Gene Expression
  • Optics
  • 2005-2009  (6)
  • 2000-2004  (10)
  • 2008  (6)
  • 2002  (10)
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Keywords
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  • 2005-2009  (6)
  • 2000-2004  (10)
Year
  • 1
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    Gene expression during the life cycle of Drosophila melanogaster (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-09-28
    Description: Molecular genetic studies of Drosophila melanogaster have led to profound advances in understanding the regulation of development. Here we report gene expression patterns for nearly one-third of all Drosophila genes during a complete time course of development. Mutations that eliminate eye or germline tissue were used to further analyze tissue-specific gene expression programs. These studies define major characteristics of the transcriptional programs that underlie the life cycle, compare development in males and females, and show that large-scale gene expression data collected from whole animals can be used to identify genes expressed in particular tissues and organs or genes involved in specific biological and biochemical processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arbeitman, Michelle N -- Furlong, Eileen E M -- Imam, Farhad -- Johnson, Eric -- Null, Brian H -- Baker, Bruce S -- Krasnow, Mark A -- Scott, Matthew P -- Davis, Ronald W -- White, Kevin P -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2002 Sep 27;297(5590):2270-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12351791" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Animals ; Cluster Analysis ; Drosophila Proteins/genetics/physiology ; Drosophila melanogaster/embryology/*genetics/*growth & development ; Embryo, Nonmammalian/physiology ; Female ; *Gene Expression ; Gene Expression Profiling ; Gene Expression Regulation, Developmental ; *Genes, Insect ; Germ Cells/physiology ; Larva/genetics ; Life Cycle Stages/*genetics ; Male ; Oligonucleotide Array Sequence Analysis ; Organ Specificity ; Pupa/genetics ; RNA, Messenger/genetics/metabolism ; Sex Characteristics ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    PAPER CURRENT
  • 2
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    Some Considerations for Precision Metrology of Thin X-Ray Mirrors (2008)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: Determination of the shape of very thin x-ray mirrors employed in spaced-based telescopes continues to be challenging. The mirrors shapes are not readily deduced to the required accuracy because the mount induced distortions are often larger than the uncertainty tolerable for the mission metrology. In addition to static deformations, dynamic and thermal considerations are exacerbated for this class of mirrors. We report on the performance of one temporary mounting scheme for the thin glass mirrors for the Constellation-X mission and prospects for deducing their undistorted shapes.
    Keywords: Optics
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    NASA TECHNICAL REPORTS
  • 3
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    Dynamic testing techniques for qualifying Mars Eploration Rover equipment to quasi-static landing loads (2002)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: In mid 2003, NASA will launch identical spacecraft to deliver two large rovers to the Martian surface. As with the successful Mars Pathfinder (MPF) mission, the MER spacecraft will use an airbag landing system to safely deliver its payload.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Fourth International Conference on Computational Stochastic Mechanics; Corfu; Greece
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    NASA TECHNICAL REPORTS
  • 4
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    ISO far-infrared spectroscopic observations of Jupiter (2002)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: We present the far-infrared spectrum of Jupiter that was measured with the Short and Long Wavelength Spectrometers aboard the Infrared Space Observatory.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Jupiter After Galileo and Cassini -- A Conference About the Giant Planets; Lisbon; Portugal
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    NASA TECHNICAL REPORTS
  • 5
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    Ares I-X Flight Test - On the Fast Track to the Future (2008)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: In less than two years, the National Aeronautics and Space Administration (NASA) will launch the Ares I-X mission. This will be the first flight of the Ares I crew launch vehicle, which, together with the Ares V cargo launch vehicle, will send humans to the Moon and beyond. Personnel from the Ares I-X Mission Management Office (MMO) are finalizing designs and fabricating vehicle hardware for an April 2009 launch. Ares I-X will be a suborbital development flight test that will gather critical data about the flight dynamics of the integrated launch vehicle stack; understand how to control its roll during flight; better characterize the severe stage separation environments that the upper stage engine will experience during future flights; and demonstrate the first stage recovery system. NASA also will modify the launch infrastructure and ground and mission operations. The Ares I-X Flight Test Vehicle (FTV) will incorporate flight and mockup hardware similar in mass and weight to the operational vehicle. It will be powered by a four-segment Solid Rocket Booster (SRB), which is currently in Shuttle inventory, and will include a fifth spacer segment and new forward structures to make the booster approximately the same size and weight as the five-segment SRB. The Ares I-X flight profile will closely approximate the flight conditions that the Ares I will experience through Mach 4.5, up to approximately130,OOO feet and through maximum dynamic pressure ("Max Q") of approximately 800 pounds per square foot. Data from the Ares I-X flight will support the Ares I Critical Design Review (CDR), scheduled for 2010. Work continues on Ares I-X design and hardware fabrication. All of the individual elements are undergoing CDRs, followed by an integrated vehicle CDR in March 2008. The various hardware elements are on schedule to begin deliveries to Kennedy Space Center (KSC) in early September 2008.
    Keywords: Spacecraft Design, Testing and Performance
    Type: MSFC-2060 , International Astronautical Conference; 29 Sep. 3 Oct. 2008; Glasgow; United Kingdom
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    NASA TECHNICAL REPORTS
  • 6
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    Fe Isotopic Composition of Presolar SiC Mainstream Grains (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: Iron isotopic distribution was measured in SiC mainstream grains from the Murchison meteorite by time-of-flight resonance ionization mass spectrometry. All grains exhibit 54Fe depletions of 50 to 200, lower than what are predicted by calculations of s-process nucleosynthesis in AGB stars. Additional information is contained in the original extended abstract.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science XXXIII; LPI-Contrib-1109
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    NASA TECHNICAL REPORTS
  • 7
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    Isotopic Composition of Barium in Single Presolar Silicon Carbide Grains (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: We have measured Ba isotope distributions in individual presolar SiC grains. We find that the Ba isotopic composition in mainstream SiC grains is consistent with models of nucleosynthesis in low to intermediate mass asymptotic giant branch (AGB) stars. Additional information is contained in the original extended abstract.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science XXXIII; LPI-Contrib-1109
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    NASA TECHNICAL REPORTS
  • 8
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    The Microwave Anisotropy Probe (MAP): Guidance, Navigation, and Control Hardware Suite (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Microwave Anisotropy Probe (MAP) was launched June 30, 2001 to create an all-sky map of the Cosmic Microwave Background. The mission's hardware suite included two Lockheed Martin AST-201 star trackers, two Kearfott Two-Axis Rate Assemblies (TARAs) mounted to provide X, Y and redundant Z-axis rates, two Adcole Digital Sun Sensor (DSS) heads sharing one set of electronics, twelve Adcole Coarse Sun Sensor (CSS) eyes, three Ithaco E-sized Reaction Wheel Assemblies (RWAs), and a Propulsion Subsystem that employed eight PRIMEX Rocket Engine Modules (REMs). This hardware has allowed MAP to meet its various Orbit and Attitude Control Requirements, including performing a complex zero-momentum scan, meeting its attitude determination requirements, and maintaining a trajectory that places MAP in a lissajous orbit around the second Sun-Earth Lagrange point (L2) via phasing loops and a lunar gravity assist. Details of MAP's attitude determination, attitude control, and trajectory design are presented separately. This paper will focus on the performance of the hardware components mentioned above, as well as the significant lessons learned through the use of these components. An emphasis will be placed on spacecraft design modifications that were needed to accommodate existing hardware designs into the MAP Observatory design.
    Keywords: Spacecraft Design, Testing and Performance
    Type: AIAA Guidance and Control Conference; Aug 01, 2002; Monterey, CA; United States
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  • 9
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    Prelaunch Instrument Calibration in the Real World: The GOES Example (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: The pre-launch ground infrared calibration of the Geostationary Operational Environmental Satellite (GOES) N-Q Imager and Sounder is presented. Ground calibration provides information necessary to the accurate on-orbit calibration of these radiometers. Infrared channels are calibrated in a thermal vacuum environment, under minimum and maximum mission operation temperatures, using a variable-temperature warm target to simulate the Earth scene and a cold target to simulate the space scene. Brightness temperatures derived from observation of the instrument internal calibration target, used for on-orbit calibration, are compared to brightness temperatures of the external calibration target as a check of relative accuracy using these two sources. Changes to the GOES N-Q specification from GOES I-M are highlighted, as well as results of noise, relative calibration accuracy, and spectral response performance to date. For completeness, results of spatial and pointing performance will be presented. Enhancements to test methodology and data processing techniques are highlighted throughout.
    Keywords: Spacecraft Design, Testing and Performance
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  • 10
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    The Microwave Anisotropy Probe (MAP) Guidance, Navigation, and Control Hardware Suite (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The on-orbit success of the Microwave Anisotropy Probe (MAP) Guidance, Navigation, and Control System can partially be attributed to the performance of a hardware suite chosen to meet the complex attitude determination and control requirements of the mission. To meet these requirements, a diverse set of components was used. The set included two Lockheed Martin AST-201 star trackers, two Kearfott Two-Axis Rate Assemblies mounted to provide X, Y and redundant Z-axis rates, two Adcole Digital Sun Sensor heads sharing one set of electronics, twelve Adcole Coarse Sun Sensor eyes, three Ithaco E-sized Reaction Wheel Assemblies, a Propulsion Subsystem that employed eight Primex Rocket Engine Modules, and a pair of Goddard-designed Attitude Control Electronics which connect all of the components to the spacecraft processor. The performance of this hardware is documented, as are some of the spacecraft accommodations and lessons learned that came from working with this particular set of hardware.
    Keywords: Spacecraft Design, Testing and Performance
    Type: AIAA Guidance and Control Conference; Aug 01, 2002; Monterey, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
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