Plasma Densities and Irregularities at 830 Km Altitude Based on Observations During 1979 PDF Download
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Author: Frederick J. Rich
Publisher:
ISBN:
Category : F region
Languages : en
Pages : 40
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Author: Frederick J. Rich
Publisher:
ISBN:
Category : F region
Languages : en
Pages : 40
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Author: Eileen MacKenzie
Publisher:
ISBN:
Category : Auroras
Languages : en
Pages : 52
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The orbiting HiLat satellite launched in 1983 offered an opportunity for studying ionospheric scintillation parameters in relation to in-situ measurements of ionization density, drift velocity, field-aligned current, and particle precipitation during the sunspot minimum period. This report discusses results of a morphological study based on observations of scintillations and total electron content (TEC) at the auroral oval station at Tromso, Norway, during the period Dec 1983 - Oct 1985. The geometrical enhancement of scintillations observed during alignment of the propagation with the local magnetic L-shell is shown to be the most consistent and conspicuous feature of scintillations in the nighttime auroral oval. The dynamics of the spatial and temporal extent of this region are illustrated in the invariant latitude/magnetic local time grid. Steepening of phase spectral slope in the geometrical enhancement region is indicative of the presence of L-shell aligned sheet-like irregularities at long scale lengths. The seasonal variation of TEC determined from the differential Doppler measurements of HiLat transmissions is discussed in relation to the in-situ density measurements at 830 km. The results are also used to illustrate the dependence of ionospheric structure parameters on short-term variability of solar activity during the sunspot minimum period. This study provides an insight into the nature of magnetospheric coupling with the ionosphere at high latitudes.
Author:
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Category : Aeronautics
Languages : en
Pages : 1126
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
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ISBN:
Category : Power resources
Languages : en
Pages : 1284
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Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1112
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February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Author:
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ISBN:
Category : Atmospheric chemistry
Languages : en
Pages : 992
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Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 898
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 794
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Author: COSPAR. Plenary Meeting
Publisher: Elsevier Science & Technology
ISBN:
Category : Science
Languages : en
Pages : 236
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These papers report on research by the working group IRI during the 1990-92 period, and the use of the IRI 90 computer code - a modelling system that gives monthly averages of electron density, temperature and ionic composition of the ionosphere.
Author:
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ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1260
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