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  • GEOPHYSICS  (4,117)
  • 1985-1989  (4,117)
  • 1
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    Global Climate Study (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The Global Surface Radiation Budget Experiment, which determines if current climate models are accurate, is explained.
    Keywords: GEOPHYSICS
    Type: ASR-250 , NASA-TM-109612 , NONP-NASA-VT-93-190410
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Magnetosphere, ionosphere and thermosphere; Proceedings of the Topical Meeting of the Twenty-sixth COSPAR Plenary Meeting, Toulouse, France, June 30-July 11, 1986 (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Papers are presented on satellite observations of new particle and field signatures associated with SAR arc field lines at magnetospheric heights, the structure of the polar oval from simultaneous observations of the optical emissions and particle precipitations during the period of high solar activity between 1981 and 1982, and SAR-arcs and emissions in the main trough of the electron concentration. Also considered are a model calculation of hydrogen Balmer emissions under various modes of proton precipitation, electron precipitation near L = 4, and an investigation of the thermosphere-ionosphere interaction by means of the neutral post-storm effect. Other topics include auroral electric field penetration into the middle-latitude trough, field-aligned currents and related phenomena in the cust, and the positive phase of ionospheric storms and its connection with the dayside cusp.
    Keywords: GEOPHYSICS
    Type: (ISSN 0273-1177)
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    NASA TECHNICAL REPORTS
  • 3
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    New data on the formation conditions and age of the Kamensk and Gusev astroblemes (1988)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Discussed is new information recently published on the higher contents of siderophilic in the block breccia, fragments of coesite rocks in the Glubokinskiy series within the Kamenskiy astrobleme. New geological data which have refined the concept regarding the structure and age of the Kamenskiy astrobleme are presented.
    Keywords: GEOPHYSICS
    Type: NASA-TT-20212 , NAS 1.77:20212
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Into the thermosphere: The atmosphere explorers (1987)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The need to study the lower thermosphere with the new instrument, data handling, and spacecraft technology available in the 1960s led to the formulation and establishment of the Atmospheric Explorer program. This book provides an overview of this program with particular emphasis on the AE3, AE4, and AE5 satellites, which represent early examples of problem-dedicated missions. Both the satellites and their instrumentation on the one hand and the experimental and scientific considerations in studying the thermosphere on the other are discussed.
    Keywords: GEOPHYSICS
    Type: NASA-SP-490 , NAS 1.21:490 , LC-87-14156
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Future plans for the NASA suborbital program (1987)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: The development of more reliable heavy-lift balloons and a fine pointed gondola; the development of the Black Brant-12 rocket for auroral research; and the development of a collaborative Orbiting Payload Using Scout program are outlined. Through 1989 NASA will conduct a comprehensive program of aircraft, balloon, and rocket campaigns in conjunction with Shuttle and satellite measurements on the Supernovae 1987a.
    Keywords: GEOPHYSICS
    Type: ESA, Proceedings of the 8th ESA Symposium on European Rocket and Balloon Programs and Related Research; p 397-400
    Format: text
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  • 6
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    Carbon monoxide measurements over the eastern Pacific during GTE/CITE 1 (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: As part of the Global Tropospheric Experiment's Chemical Instrumentation Test and Evaluation (GTE/CITE 1) intercomparison, carbon monoxide (CO) measurements were made from the NASA CV-990 aircraft during the fall of 1983 and again in the spring of 1984. The experimental measurements for CO obtained during those flight series over the eastern and mid-Pacific are presented here. Data were acquired from 10 to 20 deg N latitude over the mid-Pacific and from 30 to 37 deg N latitude over the eastern Pacific off the coast of California. A seasonal variation of approximately 34 parts per billion by volume was measured over the altitudes and latitudes sampled, and a small latitudinal variation was also noted. The data are discussed in terms of the meteorological context in which they were collected.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 92; 2095-210
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  • 7
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    Plasma diagnostics package measurements of ionospheric ions and Shuttle-induced perturbations (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The plasma diagnostics package (PDP) on the Space Shuttle STS-3 mission in March 1982 carried among its instrument complement a retarding potential analyzer. This instrument measured both the ambient ion plasma density and temperature, and perturbations to the plasma produced by Shuttle Orbiter effects. Whenever the plasma flow streamline at the instrument was more than a distance of the order of thermal ion gyroradii away from any Orbiter surface, the measurements were characteristic of the ambient ionosphere. In several situations, the PDP was positioned so as to scan the wake in the plasma flow produced by Orbiter surfaces. The density profile of the major species O(+) was consistent with a classic Mach cone. However, strong perturbations extended for several meters outside the Mach cone, which resulted in failure of flowing Maxwellian distributions to represent the data. Configurations where the plasma-flow-impacted Orbiter surfaced downstream of the PDP resulted in generation of a suprathermal ion component. The observations are discussed in terms of a recent model of the mechanism for generation of Shuttle glow.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 91; 13463-13
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  • 8
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    Space opportunities for tropospheric chemistry research (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The use of the Space Shuttle to measure tropospheric trace species is examined. Factors which affect the measurement of tropospheric trace species are discussed. The Academy of Sciences 1985 report categorized the trace species into levels: first-level gases include water vapor, O3, CO, and CH4, and the second-level gases are N2O, NO2, NH3, SO2, chlorofluoromethanes, and HCl. The effects of first-level gases on the earth's climate, the photochemistry/chemistry of the troposphere, and the photochemical/chemical production and destruction of the hydroxyl radical are studied; the distribution and magnitude of the hydroxyl radical in the troposphere are analyzed in terms of water vapor, O3, CO, and CH4.
    Keywords: GEOPHYSICS
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  • 9
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    The paradox of age: Tectites and tectite showers (1987)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: When discussing the problem of tectite origin, the age of the tectites themselves (actual glasses) must be distinguished from the date of their fall on the earth's surface, i.e., the geological age of tectite fields. The considerable difference between their two ages is the essence of the paradox which will be discussed here.
    Keywords: GEOPHYSICS
    Type: NASA-TT-20102 , NAS 1.77:20102
    Format: text
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  • 10
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    Iridium in the Vredefort Bronzite Granophyre - Impact melting and limits on a possible extraterrestrial component (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The Bronzite Granophyre was analyzed for Ir and other elements to examine whether its origin was due to impact melting or conventional igneous assimilation and to search for a possible extraterrestrial component in the melt. No such component is identified. Ir values range from 50-130 pg/g, equivalent to less than 0.05 percent C1 material. Further evidence against an extraterrestrial source of siderophiles are the low Ir/Au ratios and the absence of systematic correlations between Ir and other elements. However, the Granophyre is significantly enriched in Ir over other Vredefort granitic rocks, implying a fundamental difference between them. Geochemical mixing models indicate that the Ir observed in the Granophyre can be supplied from high-Ir local shales and quartzites during an impact melting event. The results are consistent with the view that the Granophyre is an impact melt and that Vredefort is an impact structure.
    Keywords: GEOPHYSICS
    Type: Lunar and Planetary Science Conference; Mar 14, 1988 - Mar 18, 1988; Houston, TX; United States
    Format: text
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