Journal ArticleDOI
Comparisons between calculated ionospheric absorption and riometer measurements
R. Heisler,G.L Hower +1 more
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In this paper, a comparison between calculated and measured absorption leads to the conclusion that high nighttime absorption levels observed at many stations is the result of errors in setting the level of the quiet-day curve.About:
This article is published in Journal of Atmospheric and Solar-Terrestrial Physics.The article was published on 1970-11-01. It has received 5 citations till now. The article focuses on the topics: Riometer & Ionospheric absorption.read more
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Book ChapterDOI
2.1. The Ionosphere
TL;DR: A review of the properties of the ionospheric layers, their origin, their effect on the propagation of electromagnetic waves, and the methods available for observing their properties so that corrective measures can be taken can be found in this article.
Journal ArticleDOI
The development of the auroral absorption substorm
O. Fjordheim,K. Henriksen +1 more
TL;DR: In this paper, a statistical analysis of 60 observed AA substorms was performed and the temporal and geographical development was obtained as a function of substorm time, including geographical extent, eastward and westward expansions, corotation of the morning max absorption intensity with the Earth and correlations between absorption intensity and magnetic and solar activity.
Journal ArticleDOI
Conjugate asymmetries in sudden commencement absorption and the sudden commencement absorption event of February 28, 1969
TL;DR: In this article, a balloon observation of sudden commencement X rays (up to 2 times background) was made near Macquarie Island ( lambda =-61 deg ) at 0423 UT on February 28, 1969.
Journal ArticleDOI
Difficulties in the study of cosmic radio noise absorption at 30 MHz using riometer at low latitude station, Kolhapur (Lat-16.8°N, Long-74.25°E)
TL;DR: In this paper, a dual dipole antenna has been installed at low latitude station Kolhapur (Geographic 16.8°N, 74.25°E), India for the study of cosmic radio noise absorption using Solid State Riometer (which operates at 30MHz) during pre phase of 24th solar maxima.
Book
Radio astronomical and satellite studies of the atmosphere : proceedings of the Corfu summer school, 17-29 June 1962
TL;DR: In this paper, King-hele et al. present a survey of ionospheric studies using radio signals from two nearly-spherical Earth satellites, the Moon and Echo I. The authors describe the difficulties caused by scintillation, which is one aspect of the "noise" problem overshadowing many of the topics discussed in the book.
References
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Journal ArticleDOI
The collision frequency in the E- and D-regions of the ionosphere
E. V. Thrane,W.R. Piggott +1 more
TL;DR: In this article, the height variation of collision frequency, v, is critically discussed using both measured data and computations based on Pack and Phelp's cross-sections applied to standard atmospheres.
Journal ArticleDOI
The collision frequency of electrons in the ionosphere
TL;DR: Theoretical analysis showed that the electron collision frequency in the ionosphere depends on the neutral particle concentration in Regions D and E and on the electron concentration in Region F as discussed by the authors.
Journal ArticleDOI
The measurement of ionospheric absorption using observations of 18·3 Mc/s cosmic radio noise
Abhijit Mitra,C.A. Shain +1 more
TL;DR: In this article, the authors measured the total attenuation suffered by 18·3 Mc/s cosmic radio noise passing completely through the ionosphere and showed that the total absorption may be divided into two components, one due to absorption mainly in the D region and the other in the F2 region.
Journal ArticleDOI
Electron temperature evidence for nonthermal equilibrium in the ionosphere
TL;DR: A review of the "dumbbell" electrostatic probe experiment is given in this article, where electron temperature and positive ion density data resulting from its use in two flights at Fort Churchill, Canada and in two launches at Wallops Island in midsummer 1960 and spring 1961, are discussed.
Journal ArticleDOI
Ionospheric backscatter observations at Millstone Hill
TL;DR: In this article, the results of observations extending over a period of one year from February 1963 to January 1964 were presented, and the results for the electron temperature were compared with results obtained using the Explorer VIII, Explorer XVII and Ariel satellites.