PROCEEDINGS OF THE VENTSPILS INTERNATIONAL RADIO ASTRONOMY CONFERENCE

≪ADVANCES IN RADIO ASTRONOMY OF NEAR-EARTH ENVIRONMENT ≫

Ventspils, 2012 August 13–15

Edited by Ivar Shmeld Ventspils University College, Latvia Maria Nechaeva Ventspils University College, Latvia and Vladislavs Bezrukovs Ventspils University College, Latvia

Baltic Astronomy, Volume 22, Number 1, 2013 2

Scientific Organizing Committee Acad. Alexander Konovalenko, National Academy of Sciences of Ukraine, Chair Mg. Vladislavs Bezrukovs, Ventspils University College (Latvia), Secretary Dr. Maris Abele, University of Latvia (Latvia) Dr. Maria Nechaeva, Ventspils University College (Latvia) Dr. Anatoly Karashtin, Radiophysical Research Institute, Nizhny Novgorod (Rus- sia) Dr. Ivar Shmeld, Ventspils University College (Latvia) Dr. Sergey Snegirev, Radiophysical Research Institute, Nizhny Novgorod () Dr. Gino Tuccari, National Institute of Astrophysics (Italy) Local Organizing Committee Ivar Shmeld, Vladislavs Bezrukovs, Normunds Jekabsons, Estere Vitola, Ieva Kozlova, Livija Aulmane, Inese Jaunzeme, Inga Pakalnite. Proceedings Proceedings of the Conference are financed from the European Social Fund Project “Signals Related to Artificial Earth Satellites: Technologies of Receiving, Transmitting and Processing” (No. 2009/0231/1DP/1.1.1.2.0/09/APIA/VIAA/151) by the Engineering Research Institute “Ventspils International Radio Astronomy Centre” of the Ventspils University College. 3

PROCEEDINGS OF THE VENTSPILS INTERNATIONAL RADIO ASTRONOMY CONFERENCE “ADVANCES IN RADIO ASTRONOMY OF NEAR-EARTH ENVIRONMENT” 2012 August 13–15, Ventspils, Latvia

CONTENTS

Photo of the meeting ...... 4

Participants ...... 5

V. Avotins Introduction ...... 7 D. Bezrukov. Spectral polarimetric observations of the Sun by the VIRAC RT-32 radio telescope: first results ...... 9

N. V. Bakhmetieva, G. I. Grigoriev, A. V. Tolmacheva. Perspective ground-based method for diagnostics of the lower ionosphere and the neutral atmosphere ...... 15

N. Dugin, A. Antipenko, V. Bezrukovs, V. Gavrilenko, A. Dementjev, A. Lesins, M. Nechaeva, I. Shmeld, S. Snegirev, Yu. Tikhomirov, J. Trokss. Radio interferometric research of ionosphere by signals of space satellites . . . . 25

M. Nechaeva, A. Antipenko, V. Bezrukovs, D. Bezrukov, A. Dementjev, N. Dugin, A. Konovalenko, V. Kulishenko, X. Liu, A. Nabatov, V. Nesteruk, G. Pupillo, A. Reznichenko, E. Salerno, I. Shmeld, O. Shulga, Y. Sybiryakova, Yu. Tikhomirov, A. Tkachenko, A. Volvach, W.-J. Yang. An experiment on radio location of objects in the near-Earth space with VLBI in 2012...... 35 S. D. Snegirev, N. V. Bakhmetieva, N. A. Dugin, A. N. Karashtin, V. P. Uryadov. Radio astronomical and radiophysical studies in the near-Earth space in the Radiophysical Research Institute ...... 43

O. M. Ulyanov, A. I. Shevtsova, D. V. Mukha, A. A. Seredkina. Investigation of the Earth ionosphere using the radio emission of pulsars. . . .. 53

F. I. Vybornov, A. V. Rakhlin. The multifractal structure of small-scale artificial ionospheric turbulence. . . .. 67 4 Identifications: Vladislavs Bezrukovs, Dace Kotlere, Dmitrijs Bezrukovs, Karina Krinkele, Photo of theIvar meeting. Shmeld, Inese Libiete, JurisGatis Freimanis, Gaigals, Estere Ieva Vitola, Kozlova, Andris Vladyslav Lesins, Kulishenko,Bakhmetieva, Agris Inese Berzins, Nikolay Jaunzeme, Maria Livija Dugin, Nechaeva, Aulmane, Oleg Olga Janis Ulyanov,Normunds Juris Ulyanova, Trokss, Jekabsons, Zagars, Anatoly Sabine Nataliya Karashtin, Upnere, Olga Elina Karashtina, Kazina Boriss Rjabovs, Fedor Vybornov, 5

PARTICIPANTS

1. Artrs Aberfelds, University of Latvia, , Latvia, [email protected] 2. Livija Aulmane, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, livija.aulmane@.lv 3. Valdis Avotins, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 4. Nataliya Bakhmetieva, Radiophysical Research Institute, Nizhny Novgorod, Russia, nv bakhm@nirfi.sci-nnov.ru 5. Agris Berzins, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 6. Edgars Bervalds, Latvian Academy of Sciences, Latvia, [email protected] 7. Dmitrijs Bezrukovs, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 8. Valerijs Bezrukovs, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 9. Vladislavs Bezrukovs, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 10. Ilmars Brensons, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 11. Nikolay Dugin, Radiophysical Research Institute, Nizhny Novgorod, Russia, [email protected] 12. Juris Freimanis, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 13. Gatis Gaigals, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 14. Linda Gulbe, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 15. Natalija Jarohnovica, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 16. Inese Jaunzeme, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 17. Normunds Jekabsons, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 18. Roberts Joffe, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, roberts.joff[email protected] 19. Juris Kalvans, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 20. Janis Kaminskis, Riga Technical University, Riga, Latvia, [email protected] 21. Anatoly Karashtin, Radiophysical Research Institute, Nizhny Novgorod, Russia, tolk@nirfi.sci-nnov.ru 22. Olga Karashtina, Radiophysical Research Institute, Nizhny Novgorod, Russia, oleshka@ nirfi.sci-nnov.ru 23. Elina Kazina, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 24. Miks Klapers, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 6

25. Dace Kotlere, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 26. Ieva Kozlova, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 27. Karina Krinkele, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 28. Vladyslav Kulishenko, Institute of Radio Astronomy, Kharkov, [email protected] 29. Andris Lesins, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 30. Inese Libiete, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 31. Maria Nechaeva, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 32. Gints Neimanis, Ventspils University College, Ventspils, Latvia, [email protected] 33. Inga Pakalnite, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 34. Liene Riekstina, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 35. Boriss Rjabovs, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 36. Raita Rollande, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 37. Ivar Shmeld, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 38. Manfreds Sneps-Sneppe, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 39. Janis Trokss, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 40. Oleg Ulyanov, Institute of Radio Astronomy, Kharkov, Ukraine, [email protected] 41. Olga Ulyanova, Kharkov National University, Kharkov, Ukraine, [email protected] 42. Sabine Upnere, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 43. Estere Vitola, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 44. Janis Vitolins, Ventspils Government Council, Latvia, [email protected] 45. Egils Vitols, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 46. Fedor Vybornov, Nizhny Novgorod Military Institute of Engineering Troops, Russia, fedor [email protected] 47. Juris Zagars, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 48. Karlis Zalite, Ventspils International Radio Astronomy Centre, Ventspils, Latvia, [email protected] 7

INTRODUCTION

Dear participants and colleagues! We are pleased to welcome you at the VIRAC2012 Conference “Advances in Radio Astronomy of Near-Earth Environment” which is organized by the Engi- neering Research Institute “Ventspils International Radio Astronomy Centre” of the Ventspils University College. This conference is dedicated to methods and instrumentation of radio astro- nomical research of the near-Earth environment. We offer the opportunity to discuss the latest developments in the two important fields: the studies of the state of the ionosphere and studies of the population of near-Earth satellites and space debris. Humanity intensively explore and use the near-Earth space and if, a decade ago the launch of satellites was possible only for a few world leader countries, nowadays every small country and even institute is able to create its own satellite. In the near future these capabilities will be available even to small business. So, now question of controlling the near-Earth space for small objects becomes more actual, especially in determining their precise orbits. Radar VLBI technique is perhaps one of the most promising ways to address these issues. The accuracy of radio observations is restricted by the emission propagation influence in different environments from natural radio sources or space satellites to receiving antennas. The Earth ionosphere creates the major impact on radio emis- sions and causes different random effects, such as phase and group delays of radio waves, scintillations of amplitude, frequency variation and others. The investiga- tion of the ionosphere is important in understanding both the natural phenomena occurring in the Earth atmosphere, and the solution of different scientific funda- mental and applied problems of radio astronomy, plasma physics, geophysics and optics. Thus, the development of radio astronomical methods giving the infor- mation about the ionosphere, is important both from the scientific and practical points of view. The conference will provide an opportunity for both formal presentations and informal discussions about the related scientific and technical aspects. The con- ference will be directed to the following fundamental research and technical issues: radar, VLBI and single dish observations of artificial and natural near-Earth ob- jects and determination of their trajectories; radio astronomical research of the ionosphere, including the investigations of radio wave propagation, the methods of plasma parameter measurements and the studies of phenomena in the ionospheric plasma, originating from the natural or artificial reasons. We are extremely happy to meet you in Ventspils in this summer time and hope you will enjoy the conference and the time spent in Ventspils. I would like to wish you productive discussions, efficient exchange of knowledge and valuable new ideas for your forthcoming investigations.

Valdis Avotins Director of VIRAC