Author: Jules AaronsPublisher:
ISBN:
Category : Ionosphere
Languages : en
Pages : 8
Book Description
The Size of Low-latitude Ionospheric Irregularities Determined from Observations of Discrete Sources of Different Angular Diameters
Author: Jules AaronsPublisher:
ISBN:
Category : Ionosphere
Languages : en
Pages : 8
Book Description
Measurement and Interpretation of the Spectra of Certain Discrete Radio Sources in the 20-40 MHz Range
Author: Donald A. GuidicePublisher:
ISBN:
Category : Ionospheric radio wave propagation
Languages : en
Pages : 60
Book Description
An investigation of certain discrete radio sources, including the experimental measurement of their flux densities and a theoretical interpretation of their spectra, has been carried out for the 20-40 MHz frequency range. The observations were made at 22.30, 26.70, 33.45 and 38.75 MHz using the 1000-ft radio telescope of the Arecibo Ionospheric Observatory. Descriptions of the observations and the data analysis are given, together with a discussion of the limitations imposed on the measurements by the ionosphere and the radio telescope. The flux densities of eight discrete radio sources at the four operating frequencies, measured relative to Taurus A, are presented. A detailed error analysis was carried out; anticipated errors are given for each flux density value. (Author).
Nuclear Science Abstracts
Author: Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1220
Book Description
Technical Abstract Bulletin
Author: Publisher:
ISBN:
Category : Science
Languages : en
Pages : 776
Book Description
Environmental Research Papers
Author: Publisher:
ISBN:
Category : Environmental geology
Languages : en
Pages : 112
Book Description
Government-wide Index to Federal Research & Development Reports
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1288
Book Description
Observations on the Release of a Cloud of Barium Atoms and Ions in the Upper Atmosphere
Author: Keith H. LloydPublisher:
ISBN:
Category : Atmosphere, Upper
Languages : en
Pages : 44
Book Description
The paper presents the results of observations on a series of releases of barium neutral atoms and ions in the upper atmosphere. One release, at 195 km, is discussed in detail. Because of the effect of winds and the earth's magnetic field on the ionized cloud, the neutral and ionized clouds drifted apart. The diffusion and descent of the neutral cloud allowed estimates of the atmospheric density and scale height to be made; the ratio of the ambipolar diffusion to the neutral diffusion coefficient of the ionized cloud yields the temperature of the atmospheric electrons. These values agree very well with the COSPAR International Reference Atmosphere. The observed drift and descent of the ionized cloud can be explained satisfactorily only if there is an electric field in the atmosphere of 1.1 x 10-3 volts m-1. The ambipolar diffusion perpendicular to the earth's magnetic field was much faster than predicted from molecular diffusion theory, and could be due to a 'Bohm' diffusion caused by plasma instabilities. (Author).
U.S. Government Research & Development Reports
Author: Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1014
Book Description
IAGA Symposium
Author: Publisher:
ISBN:
Category : Geomagnetism
Languages : en
Pages : 966
Book Description
Meteorological and Geoastrophysical Abstracts
Author: Publisher:
ISBN:
Category : Cosmic physics
Languages : en
Pages : 836
Book Description
