TY  - JOUR
A1  - Sadovnichii, V. A.
A1  - Panasyuk, M. I.
A1  - Amelyushkin, A. M.
A1  - Bogomolov, V. V.
A1  - Benghin, V. V.
A1  - Garipov, G. K.
A1  - Kalegaev, V. V.
A1  - Klimov, P. A.
A1  - Khrenov, B. A.
A1  - Petrov, V. L.
A1  - Sharakin, S. A.
A1  - Shirokov, A. V.
A1  - Svertilov, S. I.
A1  - Zotov, M. Y.
A1  - Yashin, I. V.
A1  - Gorbovskoy, E. S.
A1  - Lipunov, V. M.
A1  - Park, I. H.
A1  - Lee, J.
A1  - Jeong, S.
A1  - Kim, M. B.
A1  - Jeong, H. M.
A1  - Shprits, Yuri Y.
A1  - Angelopoulos, V.
A1  - Russell, C. T.
A1  - Runov, A.
A1  - Turner, D.
A1  - Strangeway, R. J.
A1  - Caron, R.
A1  - Biktemerova, S.
A1  - Grinyuk, A.
A1  - Lavrova, M.
A1  - Tkachev, L.
A1  - Tkachenko, A.
A1  - Martinez, O.
A1  - Salazar, H.
A1  - Ponce, E.
T1  - "Lomonosov" Satellite-Space Observatory to Study Extreme Phenomena in Space
JF  - Space science reviews
N2  - The "Lomonosov" space project is lead by Lomonosov Moscow State University in collaboration with the following key partners: Joint Institute for Nuclear Research, Russia, University of California, Los Angeles (USA), University of Pueblo (Mexico), Sungkyunkwan University (Republic of Korea) and with Russian space industry organi-zations to study some of extreme phenomena in space related to astrophysics, astroparticle physics, space physics, and space biology. The primary goals of this experiment are to study: -Ultra-high energy cosmic rays (UHECR) in the energy range of the Greizen-ZatsepinKuzmin (GZK) cutoff; -Ultraviolet (UV) transient luminous events in the upper atmosphere; -Multi-wavelength study of gamma-ray bursts in visible, UV, gamma, and X-rays; -Energetic trapped and precipitated radiation (electrons and protons) at low-Earth orbit (LEO) in connection with global geomagnetic disturbances; -Multicomponent radiation doses along the orbit of spacecraft under different geomagnetic conditions and testing of space segments of optical observations of space-debris and other space objects; -Instrumental vestibular-sensor conflict of zero-gravity phenomena during space flight. This paper is directed towards the general description of both scientific goals of the project and scientific equipment on board the satellite. The following papers of this issue are devoted to detailed descriptions of scientific instruments.
KW  - Gamma-ray bursts
KW  - Ultra-high energy cosmic rays
KW  - Radiation belts
KW  - Space mission
Y1  - 2017
U6  - https://doi.org/10.1007/s11214-017-0425-x
SN  - 0038-6308
SN  - 1572-9672
VL  - 212
SP  - 1705
EP  - 1738
PB  - Springer
CY  - Dordrecht
ER  - 
TY  - JOUR
A1  - Cao, Xing
A1  - Shprits, Yuri Y.
A1  - Ni, Binbin
A1  - Zhelavskaya, Irina
T1  - Scattering of Ultra-relativistic Electrons in the Van Allen Radiation Belts Accounting for Hot Plasma Effects
JF  - Scientific reports
N2  - Electron flux in the Earth’s outer radiation belt is highly variable due to a delicate balance between competing acceleration and loss processes. It has been long recognized that Electromagnetic Ion Cyclotron (EMIC) waves may play a crucial role in the loss of radiation belt electrons. Previous theoretical studies proposed that EMIC waves may account for the loss of the relativistic electron population. However, recent observations showed that while EMIC waves are responsible for the significant loss of ultra-relativistic electrons, the relativistic electron population is almost unaffected. In this study, we provide a theoretical explanation for this discrepancy between previous theoretical studies and recent observations. We demonstrate that EMIC waves mainly contribute to the loss of ultra-relativistic electrons. This study significantly improves the current understanding of the electron dynamics in the Earth’s radiation belt and also can help us understand the radiation environments of the exoplanets and outer planets.
Y1  - 2017
U6  - https://doi.org/10.1038/s41598-017-17739-7
SN  - 2045-2322
VL  - 7
PB  - Nature Publ. Group
CY  - London
ER  - 
TY  - JOUR
A1  - Usanova, Maria E.
A1  - Shprits, Yuri Y.
T1  - Inner magnetosphere coupling
BT  - Recent advances
JF  - Journal of geophysical research : Space physics
N2  - The dynamics of the inner magnetosphere is strongly governed by the interactions between different plasma populations that are coupled through large-scale electric and magnetic fields, currents, and wave-particle interactions. Inner magnetospheric plasma undergoes self-consistent interactions with global electric and magnetic fields. Waves excited in the inner magnetosphere from unstable particle distributions can provide energy exchange between different particle populations in the inner magnetosphere and affect the ring current and radiation belt dynamics. The ionosphere serves as an energy sink and feeds the magnetosphere back through the cold plasma outflow. The precipitating inner magnetospheric particles influence the ionosphere and upper atmospheric chemistry and affect climate. Satellite measurements and theoretical studies have advanced our understanding of the dynamics of various plasma populations in the inner magnetosphere. However, our knowledge of the coupling processes among the plasmasphere, ring current, radiation belts, global magnetic and electric fields, and plasma waves generated within these systems is still incomplete. This special issue incorporates extended papers presented at the Inner Magnetosphere Coupling III conference held 23–27 March 2015 in Los Angeles, California, USA, and includes modeling and observational contributions addressing interactions within different plasma populations in the inner magnetosphere (plasmasphere, ring current, and radiation belts), coupling between fields and plasma populations, as well as effects of the inner magnetosphere on the ionosphere and atmosphere.
KW  - inner magnetosphere
KW  - ring current
KW  - radiation belts
KW  - magnetosphere
KW  - ionosphere interactions
KW  - plasmasphere
KW  - solar wind
Y1  - 2016
U6  - https://doi.org/10.1002/2016JA023614
SN  - 2169-9380
SN  - 2169-9402
VL  - 122
IS  - 1
SP  - 102
EP  - 104
PB  - American Geophysical Union
CY  - Washington
ER  - 
TY  - JOUR
A1  - Zhelavskaya, Irina
A1  - Shprits, Yuri Y.
A1  - Spasojevic, Maria
T1  - Empirical Modeling of the Plasmasphere Dynamics Using Neural Networks
JF  - Journal of geophysical research : Space physics
N2  - We present the PINE (Plasma density in the Inner magnetosphere Neural network‐based Empirical) model ‐ a new empirical model for reconstructing the global dynamics of the cold plasma density distribution based only on solar wind data and geomagnetic indices. Utilizing the density database obtained using the NURD (Neural‐network‐based Upper hybrid Resonance Determination) algorithm for the period of 1 October 2012 to 1 July 2016, in conjunction with solar wind data and geomagnetic indices, we develop a neural network model that is capable of globally reconstructing the dynamics of the cold plasma density distribution for 2≤L≤6 and all local times. We validate and test the model by measuring its performance on independent data sets withheld from the training set and by comparing the model‐predicted global evolution with global images of He+ distribution in the Earth's plasmasphere from the IMAGE Extreme UltraViolet (EUV) instrument. We identify the parameters that best quantify the plasmasphere dynamics by training and comparing multiple neural networks with different combinations of input parameters (geomagnetic indices, solar wind data, and different durations of their time history). The optimal model is based on the 96 h time history of Kp, AE, SYM‐H, and F10.7 indices. The model successfully reproduces erosion of the plasmasphere on the nightside and plume formation and evolution. We demonstrate results of both local and global plasma density reconstruction. This study illustrates how global dynamics can be reconstructed from local in situ observations by using machine learning techniques.
Y1  - 2017
U6  - https://doi.org/10.1002/2017JA024406
SN  - 2169-9380
SN  - 2169-9402
VL  - 122
SP  - 11227
EP  - 11244
PB  - American Geophysical Union
CY  - Washington
ER  - 
TY  - JOUR
A1  - Kim, Kyung-Chan
A1  - Shprits, Yuri Y.
T1  - Dependence of the amplitude of magnetosonic waves on the solar wind and AE index using Van Allen Probes
JF  - Journal of geophysical research : Space physics
N2  - We present the dependence of the magnetosonic wave amplitudes both outside and inside the plasmapause on the solar wind and AE index using Van Allen Probe-A spacecraft during the time period of 1 October 2012 to 31 December 2015, based on a correlation and regression analysis. Solar wind parameters considered are the southward interplanetary magnetic field (IMF B-S), solar wind number density (N-SW), and bulk speed (V-SW). We find that the wave amplitudes outside (inside) the plasmapause are well correlated with the preceding AE, IMF B-S, and N-SW with time delays, each corresponding to 2-3 h (3-4 h), 4-5 h (3-4 h), and 2-3 h (8-9 h), while the correlation with V-SW is ambiguous both inside and outside the plasmapause. As measured by the correlation coefficient, the IMF B-S is the most influential solar wind parameter that affects the dayside wave amplitudes both outside and inside the plasmapause, while N-SW contributes to enhancing the duskside waves outside the plasmapause. The AE effect on wave amplitudes is comparable to that of IMF B-S. More interestingly, regression with time histories of the solar wind parameters and the AE index preceding the wave measurements outside the plasmapause shows significant dependence on the IMF B-S, N-SW, and AE: the region of peak coefficients is changed with time delay for IMF B-S and AE, while isolated peaks around duskside remain gradually decrease with time for N-SW. In addition, the regression with magnetosonic waves inside the plasmapause shows high coefficients around prenoon sector with preceding IMF B-S and V-SW.
KW  - magnetosonic equatorial noise
KW  - solar wind dependence
KW  - Van Allen Probes
Y1  - 2017
U6  - https://doi.org/10.1002/2017JA024094
SN  - 2169-9380
SN  - 2169-9402
VL  - 122
SP  - 6022
EP  - 6034
PB  - American Geophysical Union
CY  - Washington
ER  - 
TY  - JOUR
A1  - Drozdov, Alexander
A1  - Shprits, Yuri Y.
A1  - Usanova, Maria E.
A1  - Aseev, Nikita
A1  - Kellerman, Adam C.
A1  - Zhu, H.
T1  - EMIC wave parameterization in the long-term VERB code simulation
JF  - Journal of geophysical research : Space physics
N2  - Electromagnetic ion cyclotron (EMIC) waves play an important role in the dynamics of ultrarelativistic electron population in the radiation belts. However, as EMIC waves are very sporadic, developing a parameterization of such wave properties is a challenging task. Currently, there are no dynamic, activity-dependent models of EMIC waves that can be used in the long-term (several months) simulations, which makes the quantitative modeling of the radiation belt dynamics incomplete. In this study, we investigate Kp, Dst, and AE indices, solar wind speed, and dynamic pressure as possible parameters of EMIC wave presence. The EMIC waves are included in the long-term simulations (1year, including different geomagnetic activity) performed with the Versatile Electron Radiation Belt code, and we compare results of the simulation with the Van Allen Probes observations. The comparison shows that modeling with EMIC waves, parameterized by solar wind dynamic pressure, provides a better agreement with the observations among considered parameterizations. The simulation with EMIC waves improves the dynamics of ultrarelativistic fluxes and reproduces the formation of the local minimum in the phase space density profiles.
KW  - radiation belts
KW  - VERB code
KW  - EMIC
Y1  - 2017
U6  - https://doi.org/10.1002/2017JA024389
SN  - 2169-9380
SN  - 2169-9402
VL  - 122
SP  - 8488
EP  - 8501
PB  - American Geophysical Union
CY  - Washington
ER  - 
TY  - JOUR
A1  - Aseev, Nikita
A1  - Shprits, Yuri Y.
A1  - Drozdov, Alexander
A1  - Kellerman, Adam C.
A1  - Usanova, Maria E.
A1  - Wang, D.
A1  - Zhelavskaya, Irina
T1  - Signatures of Ultrarelativistic Electron Loss in the Heart of the Outer Radiation Belt Measured by Van Allen Probes
JF  - Journal of geophysical research : Space physics
N2  - Up until recently, signatures of the ultrarelativistic electron loss driven by electromagnetic ion cyclotron (EMIC) waves in the Earth's outer radiation belt have been limited to direct or indirect measurements of electron precipitation or the narrowing of normalized pitch angle distributions in the heart of the belt. In this study, we demonstrate additional observational evidence of ultrarelativistic electron loss that can be driven by resonant interaction with EMIC waves. We analyzed the profiles derived from Van Allen Probe particle data as a function of time and three adiabatic invariants between 9 October and 29 November 2012. New local minimums in the profiles are accompanied by the narrowing of normalized pitch angle distributions and ground‐based detection of EMIC waves. Such a correlation may be indicative of ultrarelativistic electron precipitation into the Earth's atmosphere caused by resonance with EMIC waves.
Y1  - 2017
U6  - https://doi.org/10.1002/2017JA024485
SN  - 2169-9380
SN  - 2169-9402
VL  - 122
SP  - 10102
EP  - 10111
PB  - American Geophysical Union
CY  - Washington
ER  - 
TY  - GEN
A1  - Shprits, Yuri Y.
T1  - Editorial: Topical Collection on the Lomonosov Mission
T2  - Space science reviews
Y1  - 2017
U6  - https://doi.org/10.1007/s11214-017-0393-1
SN  - 0038-6308
SN  - 1572-9672
VL  - 212
SP  - 1685
EP  - 1686
PB  - Springer
CY  - Dordrecht
ER  - 
TY  - JOUR
A1  - Shprits, Yuri Y.
A1  - Angelopoulos, V.
A1  - Russell, C. T.
A1  - Strangeway, R. J.
A1  - Runov, A.
A1  - Turner, D.
A1  - Caron, R.
A1  - Cruce, P.
A1  - Leneman, D.
A1  - Michaelis, I.
A1  - Petrov, V.
A1  - Panasyuk, M.
A1  - Yashin, I.
A1  - Drozdov, Alexander
A1  - Russell, C. L.
A1  - Kalegaev, V.
A1  - Nazarkov, I.
A1  - Clemmons, J. H.
T1  - Scientific Objectives of Electron Losses and Fields INvestigation Onboard Lomonosov Satellite
JF  - Space science reviews
N2  - The objective of the Electron Losses and Fields INvestigation on board the Lomonosov satellite ( ELFIN-L) project is to determine the energy spectrum of precipitating energetic electrons and ions and, together with other polar-orbiting and equatorial missions, to better understand the mechanisms responsible for scattering these particles into the atmosphere. This mission will provide detailed measurements of the radiation environment at low altitudes. The 400-500 km sun-synchronous orbit of Lomonosov is ideal for observing electrons and ions precipitating into the atmosphere. This mission provides a unique opportunity to test the instruments. Similar suite of instruments will be flown in the future NSF-and NASA-supported spinning CubeSat ELFIN satellites which will augment current measurements by providing detailed information on pitch-angle distributions of precipitating and trapped particles.
KW  - Magnetospheric physics
KW  - Observations
KW  - Particles precipitating
KW  - Particles trapped
KW  - Radiation belts
Y1  - 2017
U6  - https://doi.org/10.1007/s11214-017-0455-4
SN  - 0038-6308
SN  - 1572-9672
VL  - 214
IS  - 1
PB  - Springer
CY  - Dordrecht
ER  - 
TY  - JOUR
A1  - Shprits, Yuri Y.
A1  - Kellerman, Adam C .
A1  - Aseev, Nikita
A1  - Drozdov, Alexander
A1  - Michaelis, Ingo
T1  - Multi-MeV electron loss in the heart of the radiation belts
JF  - Geophysical research letters
N2  - Significant progress has been made in recent years in understanding acceleration mechanisms in the Earth's radiation belts. In particular, a number of studies demonstrated the importance of the local acceleration by analyzing the radial profiles of phase space density (PSD) and observing building up peaks in PSD. In this study, we focus on understanding of the local loss using very similar tools. The profiles of PSD for various values of the first adiabatic invariants during the previously studied 17 January 2013 storm are presented and discussed. The profiles of PSD show clear deepening minimums consistent with the scattering by electromagnetic ion cyclotron waves. Long-term evolution shows that local minimums in PSD can persist for relatively long times. During considered interval of time the deepening minimums were observed around L* = 4 during 17 January 2013 storm and around L* = 3.5 during 1 March 2013 storm. This study shows a new method that can help identify the location, magnitude, and time of the local loss and will help quantify local loss in the future. This study also provides additional clear and definitive evidence that local loss plays a major role for the dynamics of the multi-MeV electrons.
Y1  - 2017
U6  - https://doi.org/10.1002/2016GL072258
SN  - 0094-8276
SN  - 1944-8007
VL  - 44
IS  - 3
SP  - 1204
EP  - 1209
PB  - American Geophysical Union
CY  - Washington
ER  -