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  • Other Sources  (67)
  • METEOROLOGY AND CLIMATOLOGY  (50)
  • FLUID MECHANICS AND HEAT TRANSFER  (10)
  • ENGINEERING (GENERAL)  (7)
  • 1
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    Calorimetric thermal-vacuum performance characterization of the BAe 80 K space cryocooler (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: A comprehensive characterization program is underway at JPL to generate test data on long-life, miniature Stirling-cycle cryocoolers for space application. The key focus of this paper is on the thermal performance of the British Aerospace (BAe) 80 K split-Stirling-cycle cryocooler as measured in a unique calorimetric thermal-vacuum test chamber that accurately simulates the heat-transfer interfaces of space. Two separate cooling fluid loops provide precise individual control of the compressor and displacer heatsink temperatures. In addition, heatflow transducers enable calorimetric measurements of the heat rejected separately by the compressor and displacer. Cooler thermal performance has been mapped for coldtip temperatures ranging from below 45 K to above 150 K, for heatsink temperatures ranging from 280 K to 320 K, and for a wide variety of operational variables including compressor-displacer phase, compressor-displacer stroke, drive frequency, and piston-displacer dc offset.
    Keywords: ENGINEERING (GENERAL)
    Type: In: IECEC '92; Proceedings of the 27th Intersociety Energy Conversion Engineering Conference, San Diego, CA, Aug. 3-7, 1992. Vol. 5 (A93-25851 09-44); p. 5.101-5.107.
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  • 2
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    Vibration characterization and control of miniature Stirling-cycle cryocoolers for space application (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: This paper provides a summary overview of the vibration characteristics of split Stirling cryocoolers of the Oxford type and describes means being developed to achieve vibration levels consistent with the exacting requirements of sensitive infrared spectrometer instruments currently under development for NASA applications. A key emphasis of the paper is on exploring both active and passive means of reducing the residual upper harmonics of the drive frequency that remain with nulled back-to-back compressor and displacer units. Vibration supression results, measured with JPL's unique six-DOF force dynamometer, are presented for an 80 K Stirling cooler.
    Keywords: ENGINEERING (GENERAL)
    Type: In: Advances in cryogenic engineering. Vol. 37B - Proceedings of the 1991 Cryogenic Engineering Conference, Univ. of Alabama, Huntsville, June 11-14, 1991 (A93-48578 20-37); p. 1019-1027.
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  • 3
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    Cold-tip off-state conduction loss of miniature Stirling cycle cryocoolers (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: For redundant miniature Stirling-cycle cryocoolers in space applications, the off-state heat conduction down the coldfinger of one cooler is a parasitic heat load on the other coolers. At JPL, a heat flow transducer specifically designed to measure this load has been developed, and measurements have been performed on the coldfinger of a British Aerospace 80 K Stirling cooler with the tip temperature ranging between 40 and 170 K. Measurements have also been made using a transient warmup technique, where the warmup rates of the coldtip under various applied heat loads are used to determine the static conduction load. There is a difference between the results of these two methods, and these differences are discussed with regard to the applicability of the transient warmup method to a nonoperating coldfinger.
    Keywords: ENGINEERING (GENERAL)
    Type: In: Advances in cryogenic engineering. Vol. 37B - Proceedings of the 1991 Cryogenic Engineering Conference, Univ. of Alabama, Huntsville, June 11-14, 1991 (A93-48578 20-37); p. 1037-1043.
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  • 4
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    Development of the operational program for satellite meteorology (1982)
    In:  CASI
    Details
    Publication Date: 2006-04-12
    Description: The geostationary and polar satellites comprising the current operational system are discussed. The data acquisition capabilities of both satellite types and their complementary functions are reviewed. The advanced very high resolution radiometer on the TIROS N satellites is particularly addressed along with the imaging and atmospheric sounding instrumentation aboard the GOES satellites. The dissemination of the satellite data to the prospective users is also discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: The Conception, Growth, Accomplishments and Future of Meteorol. Satellites; p 34-40
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  • 5
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    Mesoscale ageostrophic circulations associated with baroclinic jet streaks (1985)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: In regard to research completed, a complete list of publications and theses sponsored through the support of the NASA Severe Storms Research Project under NASA contract NAS8-33222 is given.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center NASA(MSFC FY-85 Atmospheric Processes Research Review; 1 p
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  • 6
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    Remarks on future developments (1982)
    In:  CASI
    Details
    Publication Date: 2006-04-12
    Description: Future developments in satellite meteorology are proposed and examined in the light of policy and funding changes.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: The Conception, Growth, Accomplishments and Future of Meteorol. Satellites; p 97-101
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  • 7
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    Energy Diagnostics and Impact Studies of FGGE Global Data Sets and GLAS GCM Simulations (1984)
    In:  CASI
    Details
    Publication Date: 2014-09-16
    Description: An analysis of a case study of the favorable impact of satellite data assimilation on model cyclone prediction is discussed. Also discussed is the isolation of systematic biases in the vertical structure of satellite derived temperatures which in all probability negatively impact the prediction of ocean cyclones during periods of rapid baroclinic amplification. Access to CYBER 205 and transfer of software for Eulerian and quasi-Lagrangian diagnostic studies of atmospheric circulation are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center Global Scale Atmospheric Processes Res. Program Review; p 126-128
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  • 8
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    A mathematically simple turbulence closure model for attached and separated turbulent boundary layers (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIAA Journal (ISSN 0001-1452); 23; 1684-169
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  • 9
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    Mesoscale ageostrophic circulations associated with baroclinic jet streaks (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Studies of ageostrophic motion attending jet streaks and convection are examined. Various types of dynamical experiments are carried out with the hybrid isentropic-sigma coordinate model. The effects of vorticity and static stability distributions on the intensity of secondary circulations forced by inertial accelerations as well as the superposition of an amplifying baroclinic wave on the jet streak structure are investigated.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center NASA(MSFC FY-84 Atmospheric Processes Res. Rev.; p 171-173
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  • 10
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    Atmospheric environment for space shuttle (STS-51L) launch (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A summary is given of selected atmospheric conditions observed near Space Shuttle STS-51L launch time on January 28, 1986, at Kennedy Space Center, Florida. Values of ambient pressure, temperature, moisture, ground winds, visual observations (cloud), and winds aloft are included. The sequence of pre-launch Jimsphere measured vertical wind profiles is given. The final atmospheric tape, which consists of wind and thermodynamic parameters versus altitude, for STS-51L vehicle ascent has been constructed. The STS-51L ascent atmospheric data tape has been constructed by Marshall Space Flight Center's Atmospheric Sciences Division to provide an internally consistent data set for use in post flight performance assessments.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-86577 , NAS 1.15:86577
    Format: application/pdf
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