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  1. No Access

    Article

    Recovery of a Large-Scale Magnetic Field Using the Stokes I-Profile Approximation Method

    This paper presents a procedure for reconstructing the longitudinal magnetic field from observational data of the complete profile of spectral magnetic lines. The method is based on a fast search algorithm for...

    A. G. Tlatov, I. A. Berezin in Geomagnetism and Aeronomy (2023)

  2. No Access

    Article

    Modeling the Solar Wind Speed Based on Various Parameters of the Coronal Magnetic Field

    The Wang–Shelley–Arge (WSA) solar wind (SW) model is based on the idea that weakly expanding coronal magnetic field tubes are associated with fast SW sources and vice versa. The Flux-Tube Expansion factor (FTE...

    I. A. Berezin, A. G. Tlatov in Geomagnetism and Aeronomy (2023)

  3. No Access

    Article

    Observations of Chromospheric Flows of Matter in Active Regions of the Sun

    This paper analyzes the observations of an original spectroheliograph telescope installed at the Kislovodsk Mountain Astronomical Station of the GAO RAS. The telescope is intended for continuous observation of...

    I. A. Berezin, A. G. Tlatov, A. A. Pevtsov in Geomagnetism and Aeronomy (2022)

  4. No Access

    Article

    Influence of the Change in the Relative Number of Pores in Activity Cycles on the Reconstruction of the Sunspot Index

    An analysis of the relative number of groups in cycles 21–24 based on the digitization of observations of sunspots at the Locarno Observatory (Locarno, Switzerland) was performed. In the Zurich classification ...

    K. A. Tlatova, V. V. Vasil’eva, I. A. Berezin, E. A. Illarionov… in Astronomy Reports (2022)

  5. No Access

    Article

    Restoration of the Profile of Chromospheric Lines in Quiet and Active Areas of the Sun

    The paper presents an analysis of a series of observations of the full H-alpha line profile in the solar chromosphere. The analysis is based on data from the spectroheliograph patrol telescope developed at the...

    I. A. Berezin, A. G. Tlatov, N. N. Skorbezh in Geomagnetism and Aeronomy (2021)

  6. No Access

    Article

    Comparative Analysis of Terrestrial and Satellite Observations of Photospheric Magnetic Field in an Appendix to Simulation of Parameters of Coronal Holes and Solar Wind

    Data from observations of the photospheric magnetic field at a number of ground stations (STOP, WSO, GONG) and by the SDO/HMI satellite for 2014–2019 are examined in terms of the accuracy of the model calculat...

    I. A. Berezin, A. G. Tlatov in Geomagnetism and Aeronomy (2020)

  7. No Access

    Article

    Prediction of Solar Flares and Background Fluxes of X-Ray Radiation According to Synoptic Ground-Based Observations Using Machine-Learning Models

    The paper presents machine-learning models for predicting powerful solar flares and background X-ray fluxes in the range of 1–8 Å. To predict solar flares for the next day, information was used on the current ...

    A. G. Tlatov, E. A. Illarionov, I. A. Berezin, A. D. Shramko in Cosmic Research (2020)

  8. No Access

    Article

    Estimates of Anthropogenic CO2 Emissions for Moscow and St. Petersburg Based on OCO-2 Satellite Measurements

    CO2 anthropogenic emissions are estimated for St. Petersburg and Moscow megacities based on OCO-2 satellite CO2 measurements. The CO2 emission rates for St. Petersburg amount to 80 and 74 t/km2 per day on March 1...

    Yu. M. Timofeev, I. A. Berezin, Ya. A. Virolainen… in Atmospheric and Oceanic Optics (2020)

  9. No Access

    Article

    The Analysis of OCO-2 Satellite Measurements of CO2 in the Vicinity of Russian Cities

    Spatiotemporal variability of CO2 has been analyzed on the basis of OCO-2 satellite measurements (more than 300 days during 4.5 years and more than 50 000 measurements) in the vicinity of Moscow, St. Petersburg, ...

    A. A. Nikitenko, Yu. M. Timofeev, I. A. Berezin… in Atmospheric and Oceanic Optics (2020)

  10. No Access

    Article

    Simulation of Coronal Mass Ejection Propagation Based on Data from Ground-Based Patrol Observations

    We present a model for the propagation of coronal mass ejections (CMEs) based on the interaction of CMEs with the solar wind through aerodynamic drag. The parameters of the solar wind are calculated based on o...

    A. G. Tlatov, I. A. Berezin, M. A. Strelkov in Geomagnetism and Aeronomy (2019)

  11. No Access

    Article

    Spatial–Temporal CO2 Variations near St. Petersburg Based on Satellite and Ground-Based Measurements

    The results of studying spatial–temporal CO2 variations near St. Petersburg in 2014–2017 based on satellite measurements (OCO-2 satellite) and ground-based spectroscopic and local measurements are presented. Acco...

    Yu. M. Timofeyev, I. A. Berezin… in Izvestiya, Atmospheric and Oceanic Physics (2019)

  12. No Access

    Article

    Microwave Synthesis of Polyfluorenes and Copolyfluorenes and Their Optical Properties

    The synthesis of copolyfluorenes by the Suzuki method under microwave heating carried out under conditions that were previously used for convection heating in an open system is studied. Using size-exclusion li...

    G. I. Nosova, L. S. Litvinova, I. A. Berezin, E. V. Zhukova… in Polymer Science, Series B (2019)

  13. No Access

    Article

    Validation of Atmospheric Numerical Models Based on Satellite Measurements of Ozone Columns

    The time series of ozone columns measured with the SBUV satellite instrument over three subarctic stations (Saint Petersburg, Harestua, and Kiruna) are analyzed. The daily and monthly mean ozone values in the ...

    Ya. A. Virolainen, Yu. M. Timofeev, I. A. Berezin… in Russian Meteorology and Hydrology (2018)

  14. Article

    Erratum to: “A highly efficient white-light-emitting diode based on a two-component polyfluorene/quantum dot composite”

    S. V. Dayneko, P. S. Samokhvalov, D. Lypenko, G. I. Nosova… in Optics and Spectroscopy (2017)

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  15. No Access

    Article

    A highly efficient white-light-emitting diode based on a two-component polyfluorene/quantum dot composite

    Organic light-emitting diodes (OLEDs) are attracting great interest of the scientific community and industry because they can be grown on flexible substrates using relatively simple and inexpensive technologie...

    S. V. Dayneko, P. S. Samokhvalov, D. Lypenko, G. I. Nosova… in Optics and Spectroscopy (2017)

  16. No Access

    Article

    Error analysis of integrated water vapor measured by СIMEL photometer

    Water vapor plays a key role in weather and climate forming, which leads to the need for continuous monitoring of its content in different parts of the Earth. Intercomparison and validation of different method...

    I. A. Berezin, Yu. M. Timofeyev… in Izvestiya, Atmospheric and Oceanic Physics (2017)

  17. No Access

    Article

    Comparison of ground-based microwave measurements of precipitable water vapor with radiosounding data

    Microwave (MW) radiometers are widely used for monitoring the precipitable water vapor (PWV), which is a key greenhouse gas in the Earth’s atmosphere. Different measurement campaigns are carried out to estimat...

    I. A. Berezin, Yu. M. Timofeyev, Ya. A. Virolainen… in Atmospheric and Oceanic Optics (2016)

  18. No Access

    Article

    The comparison of IR and MW ground-based measurements of total precipitable water

    Water vapor is one of the basic climate gases playing a key role in various processes at different altitudes of the Earth’s atmosphere. An intercomparison and validation of different total precipitable water (...

    I. A. Berezin, Ya. A. Virolainen… in Izvestiya, Atmospheric and Oceanic Physics (2016)

  19. No Access

    Article

    Spontaneous and stimulated emissions of copolyfluorenes during photo- and electro-excitation

    This review concerns the specific features of photo- and electroexcited processes of excitation energy deactivation in one of the most widely studied classes of organic semiconducting polymers, copolyfluorenes...

    T. N. Kopylova, R. M. Gadirov, K. M. Degtyarenko… in Polymer Science Series B (2014)

  20. No Access

    Article

    Synthesis and photo- and electroluminescent properties of copolyfluorenes with nile red fragments in side chains

    New copolyfluorenes containing units of 4,7-dibromo-2,1,3-benzothiadiazole (green luminophore) and 3,6- or 2,7-dibromocarbazole derivatives with side-chain fragments of green (4-pyrrolidinyl-1,8-naphthalimide)...

    G. I. Nosova, D. A. Lypenko, R. Yu. Smyslov, I. A. Berezin… in Polymer Science Series B (2014)

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