Differential Electron Flux Spectra Measured by the Magnetospheric Multiscale Mission (MMS) Show Strong Field-aligned Electron Population of Ionospheric Origin

Conrad Schiff1, George V Khazanov2, Barbara L Giles3, Levon A Avanov1, James L Burch4, Victoria N Coffey5, John Dorelli3, Daniel J Gershman6, Benoit Lavraud7, Thomas Earle Moore8, William R Paterson1, Craig J Pollock9, Christopher T Russell10 and Robert J Strangeway11, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)NASA Goddard Space Flight Center, Greenbelt, United States, (3)NASA Goddard Space Flight Center, Heliophysics Science Division, Greenbelt, MD, United States, (4)Southwest Research Institute, San Antonio, United States, (5)NASA Marshall Space Flight Center, Huntsville, AL, United States, (6)University of Maryland College Park, College Park, United States, (7)Laboratoire d'astrophysique de Bordeaux, Pessac, France, (8)NASA Goddard Space Flight Ctr, Greenbelt, United States, (9)Denali Scientific, NA, Healy, United States, (10)University of California, IGPP/EPSS, Los Angeles, CA, United States, (11)University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, United States