Results 141 to 150 of about 425 (190)

Traveling Ionospheric Disturbances

Angeline G Burrell, K A Zawdie, J Klenzing   +2 more
exaly   +2 more sources

Determination of travelling ionospheric disturbances

Journal of Atmospheric and Terrestrial Physics, 1978
A total of 35 days of Faraday rotation data was obtained from the ATS-6 radio beacon experiment operating with the closely spaced network of Elbert, Table Mountain, and Fort Morgan. The 140-MHz Faraday bandpass data are uncorrelated in the transmission range from 8 to 45 minutes. There are distinct, well correlated, and time-displaced maxima and minima
W. Degenhardt, G.K. Hartmann, K. Davies
openaire   +1 more source

The dispersion of traveling ionospheric disturbances

Journal of Geophysical Research: Space Physics, 1983
The horizontal dispersion of relatively large daytime TID events seen by the Dartmouth rapid‐run ionosonde network is found to conform, at least qualitatively, to that predicted by previous theoretical treatments of freely propagating gravity waves in the presence of dissipation.
M. G. Morgan, B. L. Tedd
openaire   +1 more source

Frequency estimation of travelling ionospheric disturbances

1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96, 2002
The use of adaptive filters in estimating the instantaneous frequency of Doppler shifted signals reflected from the ionosphere is addressed in this paper. With the aid of a software simulator, it has been shown that an adaptive linear predictor is effective in extracting the required Doppler shift.
J.M. O'Keefe, D.A. Campbell, L.W. Cahill
openaire   +1 more source

The effects of travelling ionospheric disturbances on ionograms

Journal of Atmospheric and Terrestrial Physics, 1977
Abstract The numerical synthesis of ionograms by ray-tracing in an analytic two-dimensional ionosphere is simplified by a technique which avoids the usual wastage of ray tracings. The technique is particularly suitable for obtaining ionogram sequences corresponding to a moving ionospheric disturbance.
R.J. Lobb, J.E. Titheridge
openaire   +1 more source

Travelling Disturbances in the Ionosphere

Nature, 1953
MEASUREMENTS of the horizontal velocity of travelling disturbances in the F2 region of the ionosphere have been made in this department over the past three years, using the method described by Munro1. Constant-frequency pulse transmitters were set up at the base station in the Physics Department of the University of Western Australia, and at two other ...
openaire   +1 more source

Traveling disturbances originating in the outer ionosphere

Journal of Geophysical Research, 1959
Some observations that have been obtained with variations of the classical echo-sounding method must be interpreted as resulting from perturbation and/or oscillation phenomena occurring in the outer ionosphere. The vertical velocity component of ‘traveling disturbances’ coming from outside and propagating through the ionosphere is determined as 115±35 ...
K. Bibl, K. Rawer
openaire   +1 more source

Travelling disturbances in the ionosphere

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1950
Abstract Methods have been developed for the examination of the horizontal and vertical movements of short-period disturbances in the ionosphere. It has been found that quasi-periodic travelling disturbances with periods of from 10 to 60 min. are of frequent occurrence in the F region by day. They appear as temporary variations in the
openaire   +1 more source

On the Relationship Between Traveling Atmospheric Disturbances and Traveling Ionospheric Disturbances

Journal of Geophysical Research: Space Physics
AbstractAs the typical thermospheric/ionospheric wave, traveling atmospheric disturbances (TADs)/traveling ionospheric disturbances (TIDs) always carry and transfer a large amount of energy and momentum during geomagnetic storms. In this study, we conducted a model simulation to explore the relationship between TADs and TIDs.
Bowei Liu, Jing Liu, Xuanqing Liu, Shuhan Li, Libo Liu   +4 more
openaire   +1 more source