Contents
Cosmic Research

Vol. 47, No. 4, 2009

Simultaneous English language translation of the journal is available from Pleiades Publishing, Ltd.
Distributed worldwide by Springer. Cosmic Research ISSN 0010-9525.

Sporadic Structures and Small-Scale Irregularity in the Nighttime Polar Ionosphere
in the Period of High Solar Activity according to the Data of Radio Occultation
Measurements on Satellite-to-Satellite Paths

O. I. Yakovlev, S. S. Matyugov, V. A. Anufriev, and G. P. Cherkunova p. 259  abstract

Manifestation of Configurations of Magnetic Clouds of the Solar Wind
in Geomagnetic Activity

N. A. Barkhatov, E. A. Kalinina, and A. E. Levitin p. 268  abstract

Vertical Distribution of the Power of Short- and Long-period Oscillations
in a Sunspot and in Surrounding Magnetic Elements

V. I. Efremov, L. D. Parfinenko, and A. A. Soloviev p. 279  abstract

On the Problem of Rotation of the Ocean and Icy Crust of Jovian Moon Europa

B. I. Rabinovich p. 287  abstract

Ballistics, Navigation, and Motion Control for a Spacecraft during Its Landing
on the Surface of Phobos

E. L. Akim, R. N. Arkhangelsky, Yu. K. Zaiko, S. M. Lavrenov,
A. L. Poroshin, E. G. Ruzsky, V. A. Stepaniants, A. G. Tuchin,
D. A. Tuchin, V. P. Fedotov, and V. S. Yaroshevsky p. 299  abstract

Design of Satellite Constellations with Continuous Coverage
on Elliptic Orbits of Molniya Type

Yu. P. Ulybyshev p. 310  abstract

Study of Singular Surfaces of Systems of Unsupported Gyrodynes
by the Parameter Continuation Method

A. I. Ignatov and V. V. Sazonov p. 322  abstract

An Alternative Algorithm for the Spacecraft Information System with Magnetometer
and Solar Sensor

A. I. Tkachenko p. 330  abstract

Short Communications

Pitch-Angle Distribution in the Earth’s Radiation Belts of Energetic Particles Accelerated
during a Strong Magnetic Storm

E. A. Muravieva p. 337  abstract

Choice of the Optimum Spatial Configuration of Satellites in the “Resonance” Project

I. E. Belova, M. M. Mogilevskii, and T. V. Romantsova p. 341  abstract

Elite Orbits in the Planetary and Moon Systems

A. T. Serkov p. 345  abstract

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