THE FORWARD-SCATTERING OF RADIO WAVES FROM OVERDENSE METEOR TRAILS

1957 ◽  
Vol 35 (9) ◽  
pp. 1033-1041 ◽  
Author(s):  
C. O. Hines ◽  
P. A. Forsyth
Keyword(s):  
Charge Density ◽  
Forward Scattering ◽  
Point Of View ◽  
Radio Waves ◽  
Geometric Factors ◽  
Meteor Trails

The forward-scattering of radio waves from overdense meteor trails is treated from an elementary point of view. The results indicate that the same geometric factors enter this problem as enter the problem of forward-scattering from underdense trails, and that the transition between underdense and overdense trails occurs at the same value of charge density as in the backscatter case. These conclusions are not expected to be generally valid when applied to individual trails, but at least they should provide a valid basis for the interpretation and prediction of the effects produced statistically by a large number of trails.

DIURNAL VARIATIONS IN THE NUMBER OF SHOWER METEORS DETECTED BY THE FORWARD-SCATTERING OF RADIO WAVES: PART I. THEORY

1955 ◽  
Vol 33 (9) ◽  
pp. 493-503 ◽  
Author(s):  
C. O. Hines
Keyword(s):  
Diurnal Variation ◽  
Incidence Rate ◽  
Forward Scattering ◽  
Diurnal Variations ◽  
Time Interval ◽  
Weight Factor ◽  
Radio Waves ◽  
Meteor Trails

Various observational factors affect the number of shower meteors which can be detected, in a given time interval, by the scattering of radio waves from the ionized meteor trails. The pertinent factors in the case of forward-scattering, where the transmitter and receiver are widely separated, are expressed approximately as functions of the position of the shower radiant. In combination, they provide an observational weight factor which may change appreciably as the radiant moves in the course of a day. The consequent diurnal variation in the occurrence of scattered signals may then be determined, and distinguished from variations due to random changes in the incidence rate of the meteors.

THE NUMBER DENSITY OF METEOR TRAILS OBSERVABLE BY THE FORWARD-SCATTERING OF RADIO WAVES

1956 ◽  
Vol 34 (10) ◽  
pp. 997-1004 ◽  
Author(s):  
Robert E. Pugh
Keyword(s):  
Forward Scattering ◽  
Radio Waves ◽  
Number Density ◽  
Meteor Trails

The number of meteor trails which can be detected by the forward-scattering of radio waves varies with the region of the sky under observation. The number density is determined theoretically, as a function of position relative to the transmitter and receiver.

A THEORETICAL RATE–AMPLITUDE RELATION IN METEORIC FORWARD-SCATTERING

1958 ◽  
Vol 36 (5) ◽  
pp. 539-554 ◽  
Author(s):  
C. O. Hines
Keyword(s):  
Observational Data ◽  
Forward Scattering ◽  
Occurrence Rate ◽  
Radio Waves ◽  
Scaling Factors ◽  
Meteor Trails ◽  
Amplitude Level ◽  
Good Agreement

The theory of the forward-scattering of radio waves by ionized meteor trails is applied to the development of a rate-amplitude relation. This relation expresses the anticipated occurrence rate of scattered signals which exceed a chosen amplitude level, as a function of that level. It is compared with preliminary observational data, and found to be in good agreement both qualitatively and quantitatively. Closest agreement is obtained only with an appropriate choice of two scaling factors. These provide an abstract of the observations in a form which is convenient for further study and interpretation.

FORWARD-SCATTERING OF RADIO WAVES BY METEOR TRAILS

1955 ◽  
Vol 33 (5) ◽  
pp. 176-188 ◽  
Author(s):  
P. A. Forsyth ◽  
E. L. Vogan
Keyword(s):  
Forward Scattering ◽  
Radio Waves ◽  
Preliminary Results ◽  
Meteor Trails ◽  
The Individual

Radio waves which are too high in frequency to be reflected by the ionospheric layers are often reflected back to the earth's surface by the ionization in meteor trails, and may be detected at distances of the order of 1000 kilometers from the transmitting station. These forward-scattered signals have been studied by the use of several transmission paths in Canada. The paper summarizes the characteristics of the individual signals and presents some preliminary results of the investigation. It seems likely that the technique will prove to be useful in meteoric studies.

HEIGHT-GAIN IN THE FORWARD-SCATTERING OF RADIO WAVES BY METEOR TRAILS

1957 ◽  
Vol 35 (1) ◽  
pp. 125-127 ◽  
Author(s):  
C. O. Hines ◽  
M. O'Grady
Keyword(s):  
Forward Scattering ◽  
Radio Waves ◽  
Height Gain ◽  
Meteor Trails

Analysis of meteor trails providing combined forward and backward scattering of radio waves

2021 ◽  
Vol 195 ◽  
pp. 105135
Author(s):  
I. Lapshina ◽  
S. Kalabanov ◽  
A. Karpov ◽  
A. Sulimov
Keyword(s):  
Radio Waves ◽  
Meteor Trails

scholarly journals Interanionic O-H...O Interactions: the Charge Density Point of View

2000 ◽  
Vol 56 (s1) ◽  
pp. s117-s117
Author(s):  
P. Macchi ◽  
B. B. Iversen ◽  
A. Sironi ◽  
B. C. Chakoumakos ◽  
F. K. Larsen
Keyword(s):  
Charge Density ◽  
Point Of View ◽  
Density Point

Identification of spatial magnetic inhomogeneities by nuclear forward scattering of synchrotron radiation

2019 ◽  
Vol 26 (4) ◽  
pp. 1310-1315
Author(s):  
Vlastimil Vrba ◽  
Vít Procházka ◽  
Marcel Miglierini
Keyword(s):  
Spatial Distribution ◽  
Magnetic Moments ◽  
Theoretical Description ◽  
Forward Scattering ◽  
Point Of View ◽  
Experimental Point ◽  
Nuclear Forward Scattering ◽  
Magnetic Inhomogeneities ◽  
Geometric Arrangements ◽  
Scattering Time

Spatially confined magnetic inhomogeneities were revealed by measuring nuclear forward scattering time spectra on the same sample in two different geometric arrangements. They differ by 180° rotation of the sample around one of the polarization axes. A basic theoretical description of this phenomenon and its relation to a spatial distribution of nuclei featuring different magnetic moments is provided. From an experimental point of view, the violation of rotational invariance was observed for an inhomogeneous Fe81Mo8Cu1B10 metallic glass. The development of magnetic inhomogeneities and their relation to the evolution of time spectra was studied during thermal annealing.

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