1. On Detecting the Fourth Gyrofrequency Harmonic in Microwave Emission Spectra above Sunspots

   • T. I. Kaltman
   • V. M. Bogod

   OriginalPaper 17 April 2019 Pages: 1 - 9

   

2. Solar Activity Observations at the World Data Center for Solar–Terrestrial Physics

   • N. A. Sergeyeva
   • L. P. Zabarinskaya
   • T. A. Krylova

   OriginalPaper 17 April 2019 Pages: 10 - 13

3. Cosmic Rays During the Geomagnetic Disturbance in January 2015

   • M. V. Kravtsova
   • V. E. Sdobnov

   OriginalPaper 17 April 2019 Pages: 14 - 17

   

4. Large-Scale and Small-Scale Solar Wind Structures Formed during Interaction of Streams in the Heliosphere

   • D. G. Rodkin
   • K. B. Kaportseva
   • Yu. S. Shugay

   OriginalPaper 17 April 2019 Pages: 18 - 28

   

5. Winter Anomaly in the Critical Frequency of the Nighttime Polar Ionosphere’s E Layer

   • M. G. Deminov
   • G. F. Deminova

   OriginalPaper 17 April 2019 Pages: 29 - 35

   

6. Correlated Disturbances of the Upper and Lower Ionosphere from Synchronous Measurements of Parameters of GNSS Signals and VLF Radio Signals

   • B. G. Gavrilov
   • Yu. I. Zetser
   • I. A. Ryakhovskii

   OriginalPaper 17 April 2019 Pages: 36 - 43

   

7. Comparison of Measured and Predicted Values of Absorbed Doses from Galactic Cosmic Rays

   • N. V. Kuznetsov
   • M. I. Panasyuk
   • M. V. Podzolko

   OriginalPaper 17 April 2019 Pages: 44 - 47

   

8. Detection of the Rotational Motion of the AIST-2D Small Spacecraft by Magnetic Measurements

   • V. I. Abrashkin
   • K. E. Voronov
   • S. Yu. Chebukov

   OriginalPaper 17 April 2019 Pages: 48 - 60

   

9. Mission Design Problems for the Spectrum-Roentgen-Gamma Project

   • R. R. Nazirov
   • N. A. Eismont
   • A. V. Ditrikh

   OriginalPaper 17 April 2019 Pages: 61 - 67