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Title: Utilization of ionosonde data to analyze the latitudinal penetration of ionospheric storm effects

Abstract

Increased emphasis is placed on global coupling between the magnetosphere, ionosphere, and thermosphere systems, particularly with regard to the penetration of dynamic, chemical, and electrodynamic effects from high to low latitudes during magnetically disturbed periods. An emerging potential exists for latitudinal and longitudinal chains of ionosondes to contribute uniquely to this thrust in ways complementary to the capabilities and shortcomings of other groundbased sensors and satellites. Here is illustrated a methodology to realize the fullest potential of such ionosonde data. Hourly values are fit in latitude using Legendre polynominals, and variations from quiet time values are displayed in latitude - U.T. coordinates using a color graphics method which provides an illuminating illustration of the penetration of ionospheric disturbances in latitude and their dependence on Kp, storm time, and local time. Observed effects are interpreted in terms of plausible electric field, neutral wind, and neutral composition changes during the storm period. Besides reflecting the anticipated southward flows and equatorward extensions in conjunction with magnetically disturbed conditions, the 24-hour average meridional winds exhibit a northward return flow after the magnetic disturbance has relaxed.

Authors:
; ;
Publication Date:
Research Org.:
Boston Univ., MA (USA)
OSTI Identifier:
6724379
Report Number(s):
AD-A-195980/8/XAB
Resource Type:
Technical Report
Resource Relation:
Other Information: Pub. in Geophysical Research Letters, Vol. 15, No. 3, 249-252(Mar 1988). Original contains color plates: All DTIC and NTIS reproductions will be in black and white
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; IONOSPHERE; DISTURBANCES; MAGNETIC STORMS; LATITUDE EFFECT; IONOSONDES; EARTH ATMOSPHERE; ELECTRONIC EQUIPMENT; EQUIPMENT; GEOGRAPHICAL VARIATIONS; PLANETARY IONOSPHERES; RADIO EQUIPMENT; VARIATIONS; 640201* - Atmospheric Physics- Auroral, Ionospheric, & Magetospheric Phenomena

Citation Formats

Forbes, J M, Codrescu, M, and Hall, T J. Utilization of ionosonde data to analyze the latitudinal penetration of ionospheric storm effects. United States: N. p., 1988. Web.
Forbes, J M, Codrescu, M, & Hall, T J. Utilization of ionosonde data to analyze the latitudinal penetration of ionospheric storm effects. United States.
Forbes, J M, Codrescu, M, and Hall, T J. 1988. "Utilization of ionosonde data to analyze the latitudinal penetration of ionospheric storm effects". United States.
@article{osti_6724379,
title = {Utilization of ionosonde data to analyze the latitudinal penetration of ionospheric storm effects},
author = {Forbes, J M and Codrescu, M and Hall, T J},
abstractNote = {Increased emphasis is placed on global coupling between the magnetosphere, ionosphere, and thermosphere systems, particularly with regard to the penetration of dynamic, chemical, and electrodynamic effects from high to low latitudes during magnetically disturbed periods. An emerging potential exists for latitudinal and longitudinal chains of ionosondes to contribute uniquely to this thrust in ways complementary to the capabilities and shortcomings of other groundbased sensors and satellites. Here is illustrated a methodology to realize the fullest potential of such ionosonde data. Hourly values are fit in latitude using Legendre polynominals, and variations from quiet time values are displayed in latitude - U.T. coordinates using a color graphics method which provides an illuminating illustration of the penetration of ionospheric disturbances in latitude and their dependence on Kp, storm time, and local time. Observed effects are interpreted in terms of plausible electric field, neutral wind, and neutral composition changes during the storm period. Besides reflecting the anticipated southward flows and equatorward extensions in conjunction with magnetically disturbed conditions, the 24-hour average meridional winds exhibit a northward return flow after the magnetic disturbance has relaxed.},
doi = {},
url = {https://www.osti.gov/biblio/6724379}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 1988},
month = {Tue Mar 01 00:00:00 EST 1988}
}

Technical Report:
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