Vol. 59, No. 4, 2021

Cosmic Research

A Study of Rayed Structures in Auroras by Triangulation Methods: 1. Height Profiles of Volume Emission Rate

B. V. Kozelov, Zh. V. Dashkevich and V. E. Ivanov p. 223 abstract

Satellite Measurements of Plasma Disturbances and Electric Currents Induced in the Midlatitude Ionosphere Modified by High-Power HF Radio Waves

V. L. Frolov, R. Yu. Luk’yanova, A. O. Ryabov and I. A. Bolotin p. 231 abstract

Some Features of Solar Proton Events on March 7, 2011, and on February 20, 2014

N. A. Vlasova, V. I. Tulupov and V. V. Kalegaev p. 250 abstract

Modeling Particle Fluxes and Absorbed Dose for Protection from Cosmic Rays Using the SHIELD Transport Code

N. M. Sobolevsky, L. N. Latysheva, H. V. Kuznetsov, M. I. Panasyuk and M. V. Podzolko p. 259 abstract

Use of the DBM Model to the Predict of Arrival of Coronal Mass Ejections to the Earth

K. B. Kaportseva and Yu. S. Shugay p. 268 abstract

Solution of the Problem of Optimal Spacecraft Launching into Orbit Using Reactive Acceleration and Solar Sail in Kustaanheimo–Stiefel Variables

Ya. G. Sapunkov and Yu. N. Chelnokov p. 280 abstract

Resonance Effects when Moving a Small Spacecraft around the Center of Mass in a Deployable Tether System

Yu. M. Zabolotnov p. 291 abstract

Erratum to: Postvolcanic Aerosols: Measurements of Altitude and Particle Sizes with Twilight-Sky Polarimetry

O. S. Ugolnikov and I. A. Maslov p. 305 abstract