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  • GEOPHYSICS  (2,353)
  • Organic Chemistry  (720)
  • SPACE VEHICLES  (556)
  • PROPULSION SYSTEMS  (295)
  • 1970-1974  (3,924)
  • 1950-1954
  • 1973  (3,924)
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  • 1970-1974  (3,924)
  • 1950-1954
Year
  • 1
    Publication Date: 2019-08-28
    Description: A chronology of the Apollo spacecraft development and production program is presented. The subjects discussed are: (1) defining contractural relations, (2) developing hardware distinctions, and (3) developing software ground rules. Illustrations, drawings, and photographs are used extensively to supplement the technical writing. Descriptions of life support systems, communication equipment, propulsion systems, control devices, and spacecraft components are provided.
    Keywords: SPACE VEHICLES
    Type: NASA-SP-4009-VOL-2
    Format: application/pdf
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  • 2
    Publication Date: 2019-08-28
    Description: The environmental conditions to which a large glide reentry vehicle such as the space shuttle is subjected is discussed. A comparison is made with the state of the art for materials and structures to meet this environmental threat. The options that are available are stressed as are the areas where additional research and development is required.
    Keywords: SPACE VEHICLES
    Type: AGARD High Temp. Corrosion of Aerospace Alloys; p 43-59
    Format: text
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  • 3
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    In:  CASI
    Publication Date: 2019-08-28
    Description: Problems involved in the handling and transportation of finished space vehicles from the factory to the launch site are presented, in addition to recommendations for properly accounting for in space vehicle structural design, adverse interactions during transportation. Emphasis is given to the protection of vehicle structures against those environments and loads encountered during transportation (including temporary storage) which would exceed the levels that the vehicle can safely withstand. Current practices for verifying vehicle safety are appraised, and some of the capabilities and limitations of transportation and handling systems are summarized.
    Keywords: SPACE VEHICLES
    Type: NASA-SP-8104
    Format: application/pdf
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  • 4
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    In:  CASI
    Publication Date: 2019-08-27
    Description: Guidance for the assessment and control of spacecraft temperatures is provided with emphasis on unmanned spacecraft in the space environment. The heat balance, elements of thermal design, and thermal control are discussed along with thermal testing, design criteria, and recommended practices.
    Keywords: SPACE VEHICLES
    Type: NASA-SP-8105
    Format: application/pdf
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  • 5
    Publication Date: 2019-08-27
    Description: The development of and operational programs for effective use in design are presented for liquid rocket pressure regulators, relief valves, check valves, burst disks, and explosive valves. A review of the total design problem is presented, and design elements are identified which are involved in successful design. Current technology pertaining to these elements is also described. Design criteria are presented which state what rule or standard must be imposed on each essential design element to assure successful design. These criteria serve as a checklist of rules for a project manager to use in guiding a design or in assessing its adequacy. Recommended practices are included which state how to satisfy each of the criteria.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-SP-8080
    Format: application/pdf
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  • 6
    Publication Date: 2019-08-14
    Description: A liquid injection electric thruster (LINJET) was designed and tested. The results of the tests were very encouraging with thruster performance levels well in excess of design goals. Supporting activities to the engine design and test included a five-million pulse life test on the main capacitor, a 46-million pulse test on the trigger electronics, design and fabrication of a zero resistance torque connector for use with the torsional pendulum thrust stand, design and fabrication of a logic box for control of engine firing, and a physical and chemical properties characterization of the perfluorocarbon propellant. While the results were encouraging, testing was limited, as many problems existed with the design. The most significant problem was involved with excessive propellant flow which contributed to false triggering and shorting. Low power active thermal control of the propellant storage cavity, coupled with a re-evaluation of the injection ring pore size and area exposed to the main capacitor discharge are areas that should be investigated should this design be carried forward.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-CR-132316
    Format: application/pdf
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  • 7
    Publication Date: 2019-08-14
    Description: A stochasitc model of the atmosphere between 30 and 90 km was developed for use in Monte Carlo space shuttle entry studies. The model is actually a family of models, one for each latitude-season category as defined in the 1966 U.S. Standard Atmosphere Supplements. Each latitude-season model generates a pseudo-random temperature profile whose mean is the appropriate temperature profile from the Standard Atmosphere Supplements. The standard deviation of temperature at each altitude for a given latitude-season model was estimated from sounding-rocket data. Departures from the mean temperature at each altitude were produced by assuming a linear regression of temperature on the solar heating rate of ozone. A profile of random ozone concentrations was first generated using an auxiliary stochastic ozone model, also developed as part of this study, and then solar heating rates were computed for the random ozone concentrations.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-69567
    Format: application/pdf
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  • 8
    Publication Date: 2019-08-14
    Description: The author has identified the following significant results. Results of the analysis of the initial sample of ERTS-1 data indicate that the MSS-5 spectral band is the most useful for detecting and mapping mountain snow cover. At the ERTS-1 resolution, snow cover can be readily detected in the MSS-5 band and can be distinguished from clouds. Snow line elevations have been mapped for five mountain areas. In one case for the Salt-Verde watershed in Arizona good agreement is observed between the location of the snow line as mapped from the ERTS-1 data and as depicted on an aerial snow survey chart compiled a week earlier. Examination of data from the Arctic has revealed that multispectral data can provide information on glacial conditions that cannot be ascertained from observations in a single spectral band.
    Keywords: GEOPHYSICS
    Type: E73-10087 , NASA-CR-130336 , P-407-3
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  • 9
    Publication Date: 2019-08-13
    Description: Since the launch of TIROS I in 1960, the utility of remote sensing from orbit for monitoring the earth's weather has been conclusively demonstrated. The past decade has also seen progress in applying remote sensing to the observation of terrestrial features. Variations in snow and ice cover, surface water, river and lake turbidity, and other hydrological features are now being accurately observed from orbital altitudes by the Earth Resources Technology Satellite (ERTS-1), NOAA-2, and Nimbus 5. Satellite visible, infrared and microwave measurements will be continued over the next few years, with improved spatial and spectral accuracy, by Skylab, ERTS-B, and Nimbus F. Delineations of soil and snow moisture variations, thermal patterns in lakes and estuaries, and regions of heavy precipitation are among the results anticipated.
    Keywords: GEOPHYSICS
    Type: Symposium on Remote sensing and water resources management; Jun 11, 1973 - Jun 14, 1973; Ontario; Canada
    Format: text
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  • 10
    Publication Date: 2019-08-13
    Description: The accommodation requirements for a representative spectrum of automated spacecraft are analyzed and compared to the services provided by the Space Shuttle and Space Tug. The purpose and engineering characteristics of a number of possible items of general purpose Shuttle-payload interface equipment are discussed. The benefits provided to automated payloads by the Space Transportation System are summarized.
    Keywords: SPACE VEHICLES
    Type: International Astronautical Congress; Oct 07, 1973 - Oct 13, 1973; Baku; Azerbaidzhan SSR
    Format: text
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