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

   • B. V. Kozelov
   • Zh. V. Dashkevich
   • V. E. Ivanov

   OriginalPaper 16 August 2021 Pages: 223 - 230

   

2. 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
   • I. A. Bolotin

   OriginalPaper 16 August 2021 Pages: 231 - 249

   

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

   • N. A. Vlasova
   • V. I. Tulupov
   • V. V. Kalegaev

   OriginalPaper 16 August 2021 Pages: 250 - 258

   

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

   • N. M. Sobolevsky
   • L. N. Latysheva
   • M. V. Podzolko

   OriginalPaper 16 August 2021 Pages: 259 - 267

   

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

   • K. B. Kaportseva
   • Yu. S. Shugay

   OriginalPaper Open access 16 August 2021 Pages: 268 - 279

   

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

   • Ya. G. Sapunkov
   • Yu. N. Chelnokov

   OriginalPaper 16 August 2021 Pages: 280 - 290

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

   • Yu. M. Zabolotnov

   OriginalPaper 16 August 2021 Pages: 291 - 304

   

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

   • O. S. Ugolnikov
   • I. A. Maslov

   Erratum 16 August 2021 Pages: 305 - 305