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This publication contains 23 papers presented at a symposium organised by the task group on the International Reference Ionosphere - a common project of COSPAR and the International Union of Radio Science. The symposium itself took place at the 31st COSPAR Scientific Assembly, held in Birmingham, UK, during July 1996. It was the original aim of this long-standing international project to establish and further develop an empirical model of the undisturbed ionosphere. The result, called International Reference Ionosphere (IRI) is an extensive computer code from which vertical (monthly average) profiles of the most important parameters of the ionospheric plasma can be obtained. Efforts have been undertaken recently to take account of, and if possible predict the effects of geomagnetic and ionospheric disturbances. The majority of papers in this volume refer to this subject that has considerable practical importance for the assessment of the relevant phenomena in the upper atmosphere of Earth as well as for predicting their effects on radio wave propagation by reflection from or penetration through the terrestrial ionosphere.
Contents
General Storm Studies. The November 1993 ionosphere storm: comparison of observed and modeled response (P.G. Richards et al. ). Prime (COST 238) studies of ionospheric storm effects (P.A. Bradley et al. ). Geomagnetic storm time studies using digisonde data (J. Scali, B.W. Reinisch). Analysis of substorm disturbances in the night time auroral zone (G.A. Zherebtsov et al. ). Particular Storm Studies. The position of the ionospheric trough as a function of local time and magnetic activity (S. Werner, G.W. Prolss). The possible effect of the IMF By and Bz components on the high latitude COST 251 area (T. Tulunay et al. ). Storm Modelling and Prediction. Short-term prediction of ionospheric peak parameters and TEC by the updated IRI model (P.V. Kishcha). Proposed menu for the ionosphere storminess assessment (T.L. Gulyaeva). Contributions to the Quiet IRI. International reference ionosphere-status 1995/1996 (D. Bilitza). Topside electron density distribution during sunrise and sunset conditions at Arecibo: comparison with IRI (V.K. Pandey et al. ). The diurnal variation of E-F valley parameters from incoherent scatter measurements at Arecibo (K.K. Mahajan et al. ).
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