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  • GEOPHYSICS  (500)
  • AERODYNAMICS  (245)
  • ENERGY PRODUCTION AND CONVERSION  (181)
  • 1980-1984  (337)
  • 1975-1979  (299)
  • 1970-1974  (290)
  • 1982  (337)
  • 1978  (299)
  • 1972  (290)
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  • 1980-1984  (337)
  • 1975-1979  (299)
  • 1970-1974  (290)
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  • 1
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    Is there any chlorine monoxide in the stratosphere? (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A ground based search for the 856.50137/cm R(9.5) and for the 859.76765 R(12.5) transitions of stratospheric (Cl-35)O was made in the solar absorption mode using an infrared heterodyne spectrometer. Lines due to stratospheric HNO3 and tropospheric OCS were detected, at about 0.3% absorption levels. The expected lines of ClO in this same region were not detected, even though the optical depth of the ClO lines should be on the order of 0.2% using currently accepted ClO abundances. These infrared measurements suggest that stratospheric ClO is at least a factor of 7 less abundant than is indicated by indirect in situ fluorescence measurements, and the upper limit of 2.4x10 to the 13th power molecules/sq cm to the integrated column density of ClO is a factor of over 4 less than is indicted by microwave measurements. Results imply that the release of fluorocarbon precursors of ClO may be significantly less important for the destruction of stratospheric ozone than was previously thought.
    Keywords: GEOPHYSICS
    Type: NASA-TM-83939 , NAS 1.15:83939
    Format: application/pdf
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  • 2
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    Simultaneous solar-wind plasma and magnetic-field measurements in the expected region of the extended geomagnetic tail. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 77; Sept. 1
    Format: text
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  • 3
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    Dual membrane hollow fiber fuel cell and method of operating same (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A gaseous fuel cell is described which includes a pair of electrodes formed by open-ended, ion-exchange hollow fibers, each having a layer of metal catalyst deposited on the inner surface and large surface area current collectors such as braided metal mesh in contact with the metal catalyst layer. A fuel cell results when the electrodes are immersed in electrolytes and electrically connected. As hydrogen and oxygen flow through the bore of the fibers, oxidation and reduction reactions develop an electrical potential. Since the hollow fiber configuration provides large electrode area per unit volume and intimate contact between fuel and oxidizer at the interface, and due to the low internal resistance of the electrolyte, high power densities can be obtained.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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  • 4
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    Local effects of partly-cloudy skies on solar and emitted radiation (1982)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A computer automated data acquisition system for atmospheric emittance, and global solar, downwelled diffuse solar, and direct solar irradiances is discussed. Hourly-integrated global solar and atmospheric emitted radiances were measured continuously from February 1981 and hourly-integrated diffuse solar and direct solar irradiances were measured continuously from October 1981. One-minute integrated data are available for each of these components from February 1982. The results of the correlation of global insolation with fractional cloud cover for the first year's data set. A February data set, composed of one-minute integrated global insolation and direct solar irradiance, cloud cover fractions, meteorological data from nearby weather stations, and GOES East satellite radiometric data, was collected to test the theoretical model of satellite radiometric data correlation and develop the cloud dependence for the local measurement site.
    Keywords: GEOPHYSICS
    Type: NASA-CR-169272 , NAS 1.26:169272
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  • 5
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    Design requirements for operational earth resources ground data processing (1972)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Realistic tradeoff data and evaluation techniques were studied that permit conceptual design of operational earth resources ground processing systems. Methodology for determining user requirements that utilize the limited information available from users is presented along with definitions of sensor capabilities projected into the shuttle/station era. A tentative method is presented for synthesizing candidate ground processing concepts.
    Keywords: GEOPHYSICS
    Type: NASA-CR-129605
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  • 6
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    An analysis of the first two years of GASP data (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Distributions of mean ozone levels from the first two years of data from the NASA Global Atmospheric Sampling Program (GASP) show spatial and temporal variations in agreement with previous measurements. The standard deviations of these distributions reflect the large natural variability of ozone levels in the altitude range of the GASP measurements. Monthly mean levels of ozone below the tropopause show an annual cycle with a spring maximum which is believed to result from transport from the stratosphere. Correlations of ozone with independent meteorological parameters, and meteorological parameters obtained by the GASP systems show that this transport occurs primarily through cyclogenesis at mid-latitudes. The GASP water vapor data, analyzed with respect to the location of the tropopause, correlates well with the simultaneously obtained ozone and cloud data.
    Keywords: GEOPHYSICS
    Type: In: Joint Conference on Sensing of Environmental Pollutants; Nov 06, 1977 - Nov 11, 1977; New Orleans, LA
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  • 7
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    Ozone climatology series. Volume 1: Atlas of total ozone, April 1970 - December 1976 (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Contours and gridded values are given for seven years of monthly mean total ozone data derived from observations with the Backscattered Ultraviolet instrument on Nimbus-4 for the Northern and Southern Hemispheres. The instrument, algorithm, uncertainties in derived ozone and systematic changes in the bias with respect to the international groundbased ozone network of Dobson instruments, are discussed.
    Keywords: GEOPHYSICS
    Type: NASA-RP-1098 , NAS 1.61:1098 , REPT-82F0128-VOL-1
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  • 8
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    Detached auroral arcs in the trough region (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: In a previous paper, Moshupi et al. (1977) have reported on the occurrence of rare auroral 'patches' equatorward of the normally well-defined boundary of diffuse aurora. Some less spectacular but more common arclike features were observed in the same 'trough' region (between the plasmapause and the auroral oval) during the period 1972-1975. These 'detached' arcs show some similarities to stable auroral red arcs in terms of their location and occurrence, but are completely different spectroscopically in that the stable auroral red arcs produce almost pure atomic oxygen red line emissions, whereas the detached arcs are deficient in red line emission - a feature implying totally different production mechanisms. The characteristics of the detached lines are described, including their unusual local time/longitude dependence.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 83; June 1
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  • 9
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    Automatic N(h,t) profiles of the ionosphere with a digital ionosonde (1972)
    In:  CASI
    Details
    Publication Date: 2006-03-12
    Description: A method is described to accomplish automatic data selection and profile inversion to obtain ionospheric electron density profiles from digitized radio soundings. The profile inversion is based on a well-established formulation by which the optimum radio frequency sounding intervals can be specified from an approximate knowledge of the profile; the expected virtual height coordinates (h) at these frequencies (f) are estimated, and procedures are then used to select h(f) observations nearest the predicted coordinates from a subsequent digital ionogram. From these the next profile is obtained. The process adaptively follows the changing shape and detail of the profile. The procedure requires an average of 15 sec per profile on a standard data processing computer, and can be adapted, with benefit to online real-time use in a digital ionosonde.
    Keywords: GEOPHYSICS
    Type: NASA. Ames Res. Center Math. of Profile Inversion; 11 p
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  • 10
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    The Stratospheric and Mesospheric Sounder (SAMS) experiment (1978)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Thermal emission and solar resonance fluorescence from the atmospheric limb are reported. Global measurements are made of radiation from the molecular species. The gas correlation spectroscopy technique based on the use of gas cells to select emission from chosen spectral lines or from particular parts of spectral lines is used. The source function and departure from the thermodynamic equilibrium between 80 and 130 kilometers associated with CO2 emission bands were investigated. The zonal wind velocity component along the line of sight is measured.
    Keywords: GEOPHYSICS
    Type: NASA. Goddard Space Flight Center The Nimbus 7 User's Guide; p 139-174
    Format: text
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