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  • GEOPHYSICS  (968)
  • Inorganic Chemistry  (785)
  • 1985-1989  (1,753)
  • 1975-1979
  • 1985  (1,753)
Collection
Keywords
Publisher
Years
  • 1985-1989  (1,753)
  • 1975-1979
Year
  • 11
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    Selection of a model of Earth's albedo radiation, practical calculation of its effect on the trajectory of a satellite (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Theoretical models of Earth's albedo radiation was proposed. By comparing disturbing accelerations computed from a model to those measured in flight with the CACTUS Accelerometer, modified according to the results. Computation of the satellite orbit perturbations from a model is very long because for each position of this satellite the fluxes coming from each elementary surface of the terrestrial portion visible from the satellite must be summed. The speed of computation is increased ten times without significant loss of accuracy thanks to a stocking of some intermediate results. Now it is possible to confront the orbit perturbations computed from the selected model with the measurements of these perturbations found with satellite as LAGEOS.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77870 , NAS 1.15:77870
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 12
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    Study of the physical properties of crystalline rocks in the southeast Voronezh anteclise (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The physical properties of rocks, in the crystalline mass of the Voronezh anteclise, were studied. The study of the physical properties of rocks is important for the improvement of geophysical methods for mapping crystalline rocks in the foundation and exploration of different geological objects which are associated with the crystalline foundation, covered by the sedimentary mantle. It is found that: (1) rocks in the crystalline foundation are very different in physical properties; (2) the physical properties are closely related to their substance composition and genesis; (3) petrographic properties give clues of rock afficiation to certain complexes; and (4) physical and magnetic properties should be examined by petrography, chemical and X-ray analysis.
    Keywords: GEOPHYSICS
    Type: NASA-TM-77823 , NAS 1.15:77823
    Format: application/pdf
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  • 13
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    Nitrogen species (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Total odd nitrogen, NO(y), may be defined as the sum of all active nitrogen species that interchange photochemically with one another on a time scale of the order of weeks or less. As noted, NO + NO2 reactions dominate the processes controlling the ozone balance in the contemporary stratosphere. The observational data from non-satellite platforms are reviewed. The growth in available satellite data in the past four years is considered. Some of the most important scientific issues are discussed, taking into account new results from atmospheric models (mainly 2-D). The model results are compared with the observational data.
    Keywords: GEOPHYSICS
    Type: Atmospheric Ozone 1985. Assessment of our Understanding of the Processes Controlling its Present Distribution and Change, Volume 2; 110 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 14
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    Instrument intercomparisons and assessments (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Over the past few years, several field campaigns were devoted to the goal of assessing instrument reliability, as opposed to solely obtaining data to answer a geophysical question. Some examples of the formal instrument intercomparisons that have occurred in the past decade and those that are planned for the very near future are listed chronologically. Balloon-borne techniques and instruments that address the height profiles of the trace species in the lower stratosphere are emphasized. Beginning with the most extensively studied trace constituent, the approach taken and the results obtained, are described. The current status of the measurement capabilities are summarized, and the needs for future intercomparisons and assessments are listed.
    Keywords: GEOPHYSICS
    Type: Atmospheric Ozone 1985. Assessment of our Understanding of the Processes Controlling its Present Distribution and Change, Volume 3; 31 p
    Format: text
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  • 15
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    Ozone and temperature trends (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The measurement of temporal changes in ozone and temperature are discussed. The data are examined within the context of natural atmospheric variability and data problems. The results are compared to numerical model calculations. The major issues are defined in terms of goal achievement. Each parameter is considered in terms of instrument type, long term effects, and altitude.
    Keywords: GEOPHYSICS
    Type: Atmospheric Ozone 1985. Assessment of our Understanding of the Processes Controlling its Pre sent Distribution and Change, Volume 3; 34 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 16
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    Effects of chemical releases by the STS 3 orbiter on the ionosphere (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: The Plasma Diagnostics Package, flown aboard STS-3 as part of the first Shuttle payload (OSS-1), recorded the effects of various chemical releases from the Orbiter. Changes in the plasma environment was observed during flash evaporator system releases, water dumps and maneuvering thruster operations. During flash evaporator operations, broadband Orbiter-generated electrostatic noise was enhanced and plasma density irregularities were observed to increase by 3 to 30 times with a spectrum which rose steeply and peaked below 6 Hz. In the case of water dumps, background electrostatic noise was enhanced at frequencies below about 3 kHz and suppressed at frequencies above 2 kHz. Thruster activity also stimulated electrostatic noise with a spectrum which peaked at approximately 0.5 kHz. In addition, ions with energies up to 1 keV were seen during some thruster events.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 90; 3487-349
    Format: text
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  • 17
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    Dynamical processes (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The techniques used to observe the middle atmosphere; the zonally-averaged and eddy structure of the middle atmosphere; seasonal variations and interannual variability; theoretical understanding of the middle atmospheric circulation are discussed. Recent satellite-based observational studies of stratospheric transport process, as revealed by the behavior of constituents and of potential vorticity (a dynamical tracer) are reviewed. The theory of global transport and its representation in transport models is discussed.
    Keywords: GEOPHYSICS
    Type: Atmospheric Ozone 1985. Assessment of our Understanding of the Processes Controlling its Present Distribution and Change, Volume 1; 110 p
    Format: text
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  • 18
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    Tropospheric chemistry (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The chemistry of the background troposphere, the source region, and the transition regions are discussed. The troposphere is governed by heterogeneous chemistry far more so than the stratosphere. Heterogeneous processes of interest involve scavenging of trace gases by aerosols, cloud and precipitation elements leading to aqueous phase chemical reactions and to temporary and permanent removal of material from the gas phase. Dry deposition is a major removal process for ozone, as well as for other gases of importance in tropospheric photochemistry. These processes are also discussed.
    Keywords: GEOPHYSICS
    Type: Atmospheric Ozone 1985. Assessment of our Understanding of the Processes Controlling its Present Distribution and Change, Volume 1; 36 p
    Format: text
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  • 19
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    Strat-trop exchange (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Exchange between the stratosphere and troposphere is important to the chemical composition of both regions. The export of ozone from the stratosphere provides the troposphere with a means of initiating photochemistry. The precursor molecules originating from the planetary surface provide the stratosphere with its chemical feedstock from which the ozone-controlling HO(x), NO(x), and Cl(x) photochemistries are driven. The tropopause is defined both statistically and in a local, synoptic sense by the value P(sub theta) = .000016 K sq m/kg/s, taken from an objective analysis of 8 years of zonal, temporal mean cross sections of potential temperature, wind and potential vorticity.
    Keywords: GEOPHYSICS
    Type: Atmospheric Ozone 1985. Assessment of our Understanding of the Processes Controlling its Present Distribution and Change, Volume 1; 92 p
    Format: text
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  • 20
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    Radiative processes (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Solar radiation and the processes that control its deposition in the Earth atmosphere are considered. The published data obtained since 1978 define a reference solar spectral irradiance for use in atmospheric chemical and dynamical studies, while long term satellite measurements are now providing information on variations in the output of the Sun over a range of time scales. As concerns absorption of solar radiation in the atmosphere, new cross section data for molecular oxygen and ozone are now available. Line-by-line calculations used to predict infrared flux divergences, both as regards assumptions made in radiative transfer calculations and in the spectroscopic parameters used as inputs are examined. Also examined are the influence of radiative processes on planetary scale wave activity, photochemical acceleration of radiative damping, and the breakdown of local thermodynamic equilibrium at mesospheric altitudes.
    Keywords: GEOPHYSICS
    Type: Atmospheric Ozone 1985. Assessment of our Understanding of the Processes Controlling its Present Distribution and Change, Volume 1; 46 p
    Format: text
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