Affiliations

Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, USA J. C. Kasper & J. Huang Smithsonian Astrophysical Observatory, Cambridge, MA, USA J. C. Kasper, A. W. Case, L. Golub, K. E. Korreck & M. L. Stevens Physics Department, University of California, Berkeley, CA, USA S. D. Bale Space Sciences Laboratory, University of California, Berkeley, CA, USA S. D. Bale, D. W. Curtis, D. E. Larson, R. Livi, P. L. Whittlesey & M. Pulupa The Blackett Laboratory, Imperial College London, London, UK S. D. Bale & T. S. Horbury Kavli Center for Astrophysics and Space Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA J. W. Belcher & J. D. Richardson Laboratoire de Physique des Plasmas, CNRS, Sorbonne Université, Ecole Polytechnique, Observatoire de Paris, Université Paris-Saclay, Paris, France M. Berthomier Department of Physics and Astronomy, University of New Hampshire, Durham, NH, USA B. D. G. Chandran & N. A. Schwadron Space Science Center, University of New Hampshire, Durham, NH, USA B. D. G. Chandran & N. A. Schwadron Heliophysics and Planetary Science Branch ST13, Marshall Space Flight Center, Huntsville, AL, USA D. Gallagher Los Alamos National Laboratory, Los Alamos, NM, USA S. P. Gary, R. M. Skoug & J. T. Steinberg Department of Physics and Astronomy, University of Iowa, IA, USA J. S. Halekas & D. McGinnis Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA G. C. Ho, R. L. McNutt Jr & N. E. Raouafi Department of Space Science and Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, Huntsville, AL, USA Q. Hu, N. V. Pogorelov & G. P. Zank Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA K. G. Klein & M. Martinovic Department of Planetary Sciences, University of Arizona, Tucson, AZ, USA K. G. Klein Department of Physics and Astronomy, University of Delaware, Newark, DE, USA B. Maruca Bartol Research Institute, University of Delaware, Newark, DE, USA B. Maruca Institut de Recherche en Astrophysique et Planétologie, CNRS, UPS, CNES, Université de Toulouse, Toulouse, France B. Lavraud & P. Louarn LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, Meudon, France M. Maksimovic NASA/Goddard Space Flight Center, Greenbelt, MD, USA A. Szabo & R. J. MacDowall Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, CA, USA M. Velli Universities Space Research Association, Science and Technology Institute, Huntsville, AL, USA K. H. Wright Department of Astrophysical Sciences, Princeton University, Princeton, NJ, USA D. J. McComas

Contributions

J.C.K. is the SWEAP Principal Investigator (PI) and led the data analysis and writing of this Article. S.D.B. is the FIELDS PI and a SWEAP Co-Investigator and provided the magnetic-field observations. J.W.B. leads the US group that developed the solar-wind Faraday cup, and provided guidance on identifying Alfvénic fluctuations. M.B. provided a pre-amplifier ASIC used within the SPAN electron instruments. A.W.C. is the SPC instrument scientist and ensured that the instrument met its performance requirements and was calibrated. B.D.G.C. contributed to the theoretical calculations and the writing of the manuscript. D.W.C. managed the effort at UCB. D.G. was the institutional lead at NASA MSFC, responsible for materials testing and calibration of SPC. S.P.G. provided recommendations on measurement requirements to detect instabilities. L.G. provided related solar observations and results. J.S.H. contributed to the analysis of the electron observations and to the writing of the manuscript. G.C.H. provided a time-of-flight ASIC to reduce the size and power of the SPAN ion instrument. T.S.H. participated in the analysis of the Alfvénic spikes. Q.H. identified magnetic flux ropes. K.G.K. contributed to the writing of the manuscript and provided warm-plasma growth rate calculations. K.E.K. led the SWEAP Science Operations Center and coordinated observing plans between the instruments and the project. M.V. contributed to the writing of the manuscript and the discussion on the relationship between Alfvénic fluctuations and angular momentum. D.E.L. is the institutional lead at Berkeley, responsible for the implementation of the SPAN instruments and the SWEAP Electronics Module suite-wide computer. R.L. is the SPAN ion instrument scientist. B.L. identified flux ropes and other signatures of coronal mass ejections in the data. P.L. coordinated solar furnace testing of the SPC materials before launch. M. Maksimovic peformed the absolute calibration of the density measurements. M. Martinovic evaluated the quality of the velocity distribution functions. N.V.P. carried out numerical simulations. J.D.R. contributed to the design of the Faraday cup. R.M.S. helped to interpret the electron pitch-angle distributions. J.T.S. identified potential field rotation causes. M.L.S. provided the overall data pipeline for SWEAP and SPC high-level data products. A.S. estimated the location of the heliospheric current sheet. P.L.W. set up the SPC calibration at MSFC and then became SPAN electron instrument scientist at Berkeley. K.H.W. arranged the SPC calibration at MSFC. G.P.Z. leads the SWEAP theory team. R.J.M. leads the FIELDS fluxgate magnetometer. D.J.M. is the IS☉IS PI and provided the energetic-particle data. R.L.M. leads the EPI-Lo energetic-particle instrument. M.P. is the FIELDS SOC lead. N.E.R. is the PSP Project Scientist and reviewed jets and similar coronal transients. N.A.S. runs the IS☉IS Science Operations Center. All authors participated in planning the observations and data collection, reviewed and discussed the observations, and read, provided feedback and approved the contents of the manuscript.

Corresponding author

Correspondence to J. C. Kasper.