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  • Other Sources  (4)
  • Chemistry and Materials (General)
  • Spacecraft Design, Testing and Performance
  • 1995-1999  (3)
  • 1990-1994  (1)
  • 1
    Publication Date: 2018-06-08
    Description: A ground-based software system to calibrate the attitude control sensors for the Ocean Topography Experiment (TOPEX) spacecraft is described.
    Keywords: Spacecraft Design, Testing and Performance
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  • 2
    Publication Date: 2019-07-13
    Description: Current methods for defining the operational support requirements of new systems are data intensive and require significant design information. Methods are being developed to aid in the analysis process of defining support requirements for new launch vehicles during their conceptual design phase that work with the level of information available during this phase. These methods will provide support assessments based on the vehicle design and the operating scenarios. The results can be used both to define expected support requirements for new launch vehicle designs and to help evaluate the benefits of using new technologies. This paper describes the models, their current status, and provides examples of their use.
    Keywords: Spacecraft Design, Testing and Performance
    Type: AIAA Paper 95-3619 , AIAA 1995 Space Programs and Technologies Conference; Sep 26, 1995 - Sep 28, 1995; Huntsville, AL; United States
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  • 3
    Publication Date: 2019-07-13
    Description: The EXPRESS rack provides accommodations for standard Mid-deck Locker and ISIS drawer payloads on the International Space Station. A design overview of the basic EXPRESS rack and two derivatives, the Human Research Facility and the Habitat Holding Rack, is given in Part I. In Part II, the design of the Solid State Power Control Module (SSPCM) is reviewed. The SSPCM is a programmable and remotely controllable power switching and voltage conversion unit which distributes and protects up to 3kW of 12OVDC and 28VDC power to payloads and rack subsystem components. Part III details the development and testing of a new data storage device, the BRP EXPRESS Memory Unit (BEMU). The BEMU is a conduction-cooled device which operates on 28VDC and is based on Boeing-modified 9GB commercial disk-drive technology. In Part IV results of a preliminary design effort for a rack Passive Damping System (PDS) are reported. The PDS is intended to isolate ISPR-based experiment racks from on-orbit vibration. System performance predictions based on component developmental testing indicate that such a system can provide effective isolation at frequencies of 1 Hz and above.
    Keywords: Spacecraft Design, Testing and Performance
    Type: International Space Station Utilization; Jan 31, 1999; Albuquerque, NM; United States
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  • 4
    Publication Date: 2019-07-10
    Description: This report presents results of gas analyses of Mach 7 Tunnel Calibration Test 139 conducted in the Langley 8-Ft. HTT from May through June of 1998. These tests in support of hypersonic airbreathing propulsion provided a current calibration at the primary test condition for the National Aero-Space Plane Concept Demonstration Engine and a new calibration for the two test conditions that will be used for engine testing in support of the Hyper-X program. Samples taken from three probes on the Flow Survey Apparatus were analyzed using mass spectrometers. Although this wind tunnel doesn't produce a true simulation of flight conditions, test results show that a uniform oxygen concentration of 21 percent was achieved.
    Keywords: Chemistry and Materials (General)
    Type: NASA/TM-1999-209712 , L-17766 , NAS 1.15:209712
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