• Evidence of high-latitude reconnecting during northward IMF: Hawkeye observations 

  Kessel, R. L.; Chen, S.-H.; Green, J. L.; Fung, S. F.; Boardsen, S. A.; Tan, Lun C.; Eastman, T. E.; Craven, J. D.; Frank, L. A. (American Geophysical Union, 1996-03-01)

  Reconnection is accepted as an important process for driving the solar wind/magnetospheric interaction although it is not fully understood. In particular, reconnection for northward interplanetary magnetic field (IMF) at ...

• Modelling the Low-Altitude Trapped Radiation Environment 

  Fung, S. F.; Boscher, D. M.; Bilitza, D.; Tan, Lun C.; Cooper, J. F. (Astrophysics Data Systems, 1996-09-18)

  Knowledge of the trapped energetic particle radiation at low altitudes (<1000 km), particularly in the vicinity of the South Atlantic Magnetic Anomaly region, is important for studying the space environmental effects on ...

• Spatial distributions of the inner radiation belt electrons: A comparison between observations and radial diffusion theory predictions 

  Boscher, D.M; Fung, S.F; Tan, Lun C. (Elsevier, 1998-05-20)

  It is well known that the quiet-time electron radiation belts exhibit a two-zone radial structure. Although the inner radiation belt does show dynamic variations during geomagnetically active periods, the stably trapped ...

• Exterior and interior polar cusps: Observations from Hawkeye 

  Chen, S.-H.; Boardsen, S. A.; Fung, S. F.; Green, J. L.; Kessel, R. L.; Tan, Lun C.; Eastman, T. E.; Craven, J. D. (American Geophysical Union, 1997-06-01)

  Hawkeye plasma, magnetic field, and plasma wave instruments directly sampled the throat of the northern polar cusp as the orientation of the interplanetary magnetic field (IMF) changed from southward to northward on July ...

• Time correlation of low-altitude relativistic trapped electron fluxes with solar wind speeds 

  Fung, Shing F.; Tan, Lun C. (American Geophysical Union, 1998-07-01)

  We present the results from a study of time correlation between the low-altitude relativistic trapped electron fluxes and the solar wind speeds. Our trapped electron observations in the energy range of 0.19–3.2 MeV were ...

• An investigation of the spatial variations of the energetic trapped electrons at low altitudes 

  Fung, S.F.; Tan, Lun C.; Bilitza, D.; Boscher, D.; Cooper, J.F. (Elsevier, 1998-08-27)

  We have analyzed the trapped electron data (0.19–3.2 MeV) taken by the Japanese OHZORA satellite operated at 350–850 km altitude in polar orbit during 1984–1987 near solar minimum. The electron observations reveal all the ...

• Ion temperature anisotropies in the Earth's high-latitude magnetosheath: Hawkeye observations 

  Tan, Lun C.; Fung, S. F.; Kessel, R. L.; Chen, S.-H.; Green, J. L.; Eastman, T. E. (American Geophysical Union, 1998-03-01)

  We present here for the first time observations of the inverse correlation between the ion temperature anisotropy and plasma beta in the Earth's high-latitude magnetosheath. Hot proton data with energies of 0.3–8 keV were ...

• An alternative drift shell parameter for modeling trapped particles 

  Fung, Shing F.; Tan, Lun C. (Elsevier, 1999-11-08)

  The McIlwain L parameter has been widely used to label magnetic drift shells of trapped particles. In a dipolar magnetic field, L gives the equatorial radius of a drift shell. When the total magnetospheric magnetic field ...

• Observation of magnetospheric relativistic electrons accelerated by Pc-5 ULF waves 

  Tan, Lun C.; Fung, Shing F.; Shao, Xi (American Geophysical Union, 2004-07-20)

  Magnetic field, electric field and energetic electron measurements from CRRES, GOES-6 and -7 satellites are used to investigate the production of up to 2 MeV electron fluxes through a storm sudden commencement (SSC) event ...

• Investigation of 3D Energetic Particle Transport Inside Quiet-Time Magnetosphere Using Particle Tracing in Global MHD Model 

  Shao, X.; Fung, Shing F.; Tan, Lun C.; Papadopoulos, Konstantinos; Wiltberger, Michael; Fok, Mei-Ching (American Geophysical Union, 2005-01-01)

• Development of a magnetospheric state-based trapped radiation database 

  Fung, S.F.; Bell, E.V.; Tan, Lun C.; Candey, R.M.; Golightly, M.J.; Huston, S.L.; King, J.H.; McGuire, R.E. (Elsevier, 2005-07-05)

  At the core of any empirical trapped radiation model is a database containing energetic particle observations. The usefulness of such a database and the performance of the resulting models depend on the database flexibility ...

• Long-term variations of the electron slot region and global radiation belt structure 

  Fung, Shing F.; Shao, Xi; Tan, Lun C. (American Geophysical Union, 2006-02-22)

  We report the observations of changes of the nominal position of the quiet-time radiation belt slot over the solar cycles. It has been found that the slot region, believed to be a result of enhanced precipitation losses ...

• Bulk Flow Velocity and First-Order Anisotropy of Solar Energetic Particles Observed on the Wind Spacecraft: Overview of Three "Gradual" Particle Events 

  Tan, Lun C.; Reames, Donald V.; Ng, Chee K. (IOP Publishing, 2007-02-17)

  We have developed techniques to calculate bulk flow velocity and first-order anisotropy of solar energetic particles (SEPs) with MeV nucleon-1 energies as recorded on the Wind spacecraft. Using the techniques we selected ...

• Ion Anisotropy and High-Energy Variability of Large Solar Particle Events: A Comparative Study 

  Tan, Lun C.; Reames, Donald V.; Ng, Chee K. (IOP Publishing, 2008-01-09)

  We have made comparative studies of ion anisotropy and high-energy variability of solar energetic particle (SEP) events previously examined by the Solar, Heliospheric, and Interplanetary Environment (SHINE) Workshop campaign. ...

• Relativistic electron acceleration by compressional-mode ULF waves: Evidence from correlated Cluster, Los Alamos National Laboratory spacecraft, and ground-based magnetometer measurements 

  Tan, Lun C.; Shao, X.; Sharma, A. S.; Fung, Shing F. (American Geophysical Union, 2011-07-28)

  Simultaneous observations by Cluster and Los Alamos National Laboratory (LANL) spacecraft and Canadian Array for Real-Time Investigations of Magnetic Activity and International Monitor for Auroral Geomagnetic Effects ...

• The role of complex ionized absorber in the soft X-ray spectra of Intermediate Polars 

  Islam, Nazma; Mukai, Koji (2021-07-12)

  In magnetic Cataclysmic Variables (mCVs), X-ray radiation originates from the shock heated multi-temperature plasma in the post-shock region near the white dwarf surface. These X-rays are modified by a complex distribution ...

• Classical Novae at Radio Wavelengths 

  Chomiuk, Laura; Linford, Justin D.; Aydi, Elias; Bannister, Keith W.; Mioduszewski, Amy J.; Mukai, Koji; Nelson, Thomas J.; Rupen, Michael P.; Ryder, Stuart D.; Sokoloski, Jennifer L.; Sokolovsky, Kirill V.; Strader, Jay; Filipovic, Miroslav D.; Finzell, Tom; Kawash, Adam; Kool, Erik C.; Metzger, Brian D.; Nyamai, Miriam M.; Ribeiro, Valerio A.R.M.; Roy, Nirupam; Urquhart, Ryan; Weston, Jennifer (2021-07-13)

  We present radio observations (1--40 GHz) for 36 classical novae, representing data from over five decades compiled from the literature, telescope archives, and our own programs. Our targets display a striking diversity ...

• Spectral Fidelity of Earth's Terrestrial and Aquatic Ecosystems 

  Thompson, David R.; Brodrick, Philip G.; Cawse-Nicholson, Kerry; Chadwick, K. Dana; Green, Robert O.; Poulter, Benjamin; Serbin, Shawn; Shiklomanov, Alexey; Townsend, Philip; Turpie, Kevin (American Geophysical Union, 2021-07-10)

  Abstract The Surface Biology and Geology (SBG) investigation will create global maps of spectral surface reflectance and emissivity at a cadence of 16 days or better, with coverage to address global questions about Earth's ...

• Detection of Above the Limb Cosmic Rays in the Optical Cherenkov Regime Using Sub-Orbital and Orbital Instruments 

  Cummings, A. L.; Aloisio, R.; Eser, J.; Krizmanic, J. F. (Proceedings of Science, 2021-07-12)

  Many upcoming experiments seek to observe high energy cosmic events while observing from either sub-orbital or orbital altitudes, using the Earth atmosphere as an extremely large instrumental volume, thereby increasing ...

• Detection of the third class of gamma-ray bursts: magnetar giant flares 

  Negro, Michela; Burns, Eric (Proceedings of Science, 2021-07-12)

  Around 11.4 million years ago a young, highly magnetized neutron star called magnetar, in the Sculptor galaxy released an enormous amount of energy in the form of a giant flare. On April 15th 2020, some of the emitted ...

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