Preface

J. Kangas

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A Short History of the Sodankylä Geophysical Observatory

E. Kataja

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Geomagnetic Observations at Sodankylä During the First International Polar Year

H. Nevanlinna

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Solar Cycle Variation in the Occurence Rate of Pc 1 and IPDP Type Magnetic Pulsations at Sodankylä

J. Kangas, J. Kultima, T. Pikkarainen, R. Kerttula and K. Mursula

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Measurement of Auroral Characteristics by Auroral Turbulence II Sounding Rocket

M. A. Danielides, A. Ranta, N. Ivchenko, J. Jussila, G. Marklund and F. Primdahl

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Small-Scale Structure of Ionospheric Absorption of Cosmic Noise During Pre-Onset and Sharp Onset Phases of an Auroral Absorption Substorm

H. Ranta, A. Ranta and J. K. Hargreaves

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Atmospheric Trends Above Finland: I Mesosphere and Thermosphere

T. Ulich, E. Turunen, A. Karinen, R. Kivi and E. Kyrö

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Atmospheric Trends Above Finland: II Troposphere and Stratosphere

R. Kivi, E. Kyrö, T. Turunen, T. Ulich and E. Turunen

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Discretization Independent Retrieval of Atmospheric Ozone Profile

B. D'Ambrogi, S. Mäenpää and M. Markkanen

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The Cosmic Ray Asymptotic Directions for Station Oulu in the Magnetic Field of the Tsyganenko 1989 Model

O. Danilova, M. Tyasto, H. Kananen and P. Tanskanen

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Deep Structure of the Earth's Crust Along the SVEKA Profile and its Extention to the North-East

E. Kozlovskaya and J. Yliniemi

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