Journal ArticleDOI
The HILAT program
E. J. Fremouw,C. L. Rino,J. F. Vickrey,D. A. Hardy,R. E. Huffmnan,F. J. Rich,C.-I. Meng,K. A. Potocki,Thomas A. Potemra,W. B. Hanson,Roderick A. Heelis,L. A. Wittwer +11 more
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TLDR
The HILAT satellite as discussed by the authors is a modified U.S. Navy TRANSIT navigation satellite and will conduct a unique combination of experiments: (1) transmissions of radio signals from the spacecraft to surface stations for measurements of ionospheric scintillations and total electron content (TEC), (2) in situ measurements of plasma density, electric fields, magnetic fields, and soft electron fluxes, and (3) visible photometric measurement and UV imaging of aurora and airglow.Abstract:
The HILAT satellite is scheduled to be launched June 1983 into a circular, 830-km-altitude orbit with an 82.2° inclination. This spacecraft is a modified U.S. Navy TRANSIT navigation satellite and will conduct a unique combination of experiments: (1) transmissions of radio signals from the spacecraft to surface stations for measurements of ionospheric scintillations and total electron content (TEC), (2) in situ measurements of plasma density, electric fields, magnetic fields, and soft electron fluxes, and (3) visible photometric measurement and UV imaging of aurora and airglow. The objective of this mission is to provide definition information on the formation, development, transport, and decay of plasma density irregularities in the high-latitude ionosphere; the relationship of these plasma processes to auroral and polar cap current systems, electric fields, convective flow patterns, and low-energy electron distributions; and the relationship of these plasma processes to the global distribution of auroral phenomena during quiet and substorm periods and during various interplanetary conditions.read more
Citations
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Journal ArticleDOI
Dayside observations of thermal‐ion upwellings at 800‐km Altitude: An ionospheric signature of the cleft ion fountain
Roland T. Tsunoda,R. C. Livingston,J. F. Vickrey,Rod Heelis,W. B. Hanson,Frederick J. Rich,P. F. Bythrow +6 more
TL;DR: In this paper, the authors presented results of upward thermal-ion flows measured at 800-km altitude in the dayside polar ionosphere by the Hilat satellite and associated them with the cleft ion fountain.
Journal ArticleDOI
Modeling and scientific application of scintillation results
E. J. Fremouw,James A. Secan +1 more
TL;DR: The WBMOD model as discussed by the authors describes threedimensionally anisotropic (sheet-like) irregularities on the nightside of the high-latitude scintillation zone and axially symmetric (rodlike) irregularities elsewhere.
Journal ArticleDOI
Ultraviolet imaging from space of the aurora under full sunlight
C.-I. Meng,R. E. Huffman +1 more
TL;DR: In this article, the first successful global-scale auroral images in full daylight were presented, showing that the earth's albedo and dayglow background are not formidable obstacles to the global auroral imaging at the VUV wavelengths.
Journal ArticleDOI
F region electron density irregularity spectra near auroral acceleration and shear regions
TL;DR: In this paper, two orbits of the Atmosphere Explorer D yielded data on F region electron irregularities in the high latitude ionosphere, associated with auroral excitation and large structured flow regions.
Journal ArticleDOI
Earthward directed high‐density Birkeland currents observed by HILAT
P. F. Bythrow,Thomas A. Potemra,W. B. Hanson,L. J. Zanetti,C.-I. Meng,R. E. Huffman,Frederick J. Rich,D. A. Hardy +7 more
TL;DR: In this paper, an earthward directed Birkeland current was detected by the HILAT satellite on July 23, 1983, less than one month after launch, and was located at the equatorward edge of a large-scale earthward flowing current in the late evening sector.
References
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Journal ArticleDOI
On the variation of radio star and satellite scintillations with zenith angle
B.H. Briggs,I.A. Parkin +1 more
TL;DR: The theory of the variation of the depth of amplitude scintillations with the zenith angle of the source is considered in this article, for radio waves received from a star or a satellite.
Journal ArticleDOI
Early results from the DNA Wideband satellite experiment—Complex‐signal scintillation
E. J. Fremouw,R. L. Leadabrand,R. C. Livingston,M. D. Cousins,C. L. Rino,B. C. Fair,R. A. Long +6 more
TL;DR: In this article, the authors present early results of the observations; salient points include the following, most of the data are consistent with phase-screen modeling of the production of ionospheric scintillation, including an ƒ−2 frequency dependence for phase variance.
Journal ArticleDOI
Empirical models of height integrated conductivities
D. D. Wallis,E. E. Budzinski +1 more
TL;DR: In this paper, two-dimensional distributions of the heightintegrated Pedersen and Hall conductivities have been computed for latitudes poleward of 60/sup 0/ invariant representative of two activity levels: 0< or =K/sub p/< or 3/sub 0/22 keV obtained by the energetic particle detector of Isis 2 during 1971-1974 are used as input to a Rees-type computation.
Journal ArticleDOI
Formation of striations in ionospheric plasma clouds
TL;DR: Barium ion clouds striation formation above E layer ascribed to LF gradient drift instability was reported in this article, where it was shown to be caused by the LF gradients drift instability.
Journal ArticleDOI
Ion convection and the formation of the mid‐latitude F region ionization trough
TL;DR: In this article, total ion concentration and ion drift velocity data from Atmospheric Explorer C are used to examine the convective flow of plasma in the vicinity of the midlatitude F region ionization trough.
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