This dataset provides  the full ion distribution functions at the BURST cadence (150 ms). The data is provided in units of phase space density. The reference frame is related to the instrument frame, and is called near-GSE.
For more information on the FPI instruments, data set, and user guide, please see:
 MMS Science Data Center (https://lasp.colorado.edu/mms/sdc/public/datasets/fpi/)
 MMS FPI Data Users and Products Guide (https://lasp.colorado.edu/galaxy/display/MFDPG/MMS+FPI+Data+Users+and+Products+Guide)
 FPI Release Notes (https://lasp.colorado.edu/mms/sdc/public/datasets/fpi/mms-FPIReleaseNotes-220217.pdf)

FPI data, as a data set of the MMS-SMART data products, are open to all scientists and the public (Users).
Users should contact the MMS-SMART Principal Investigator (PI) J. L. Burch and B. Giles the FPI Lead to consult on the appropriate use of instrument data.
Users should acknowledge the sources of data used in all publications, presentations, and reports.
Please send information on the use of these data to:
    PI: J. L. Burch [jburch@swri.edu]
    FPI Lead: B. Giles [barbara.giles@gsfc.nasa.gov]
We suggest to add the following lines into the acknowledgments:
The authors acknowledge NASA, CNES (Centre National d'Etudes Spatiales) and CNRS (Centre National de la Recherche Scientifique) for their support to the MMS/FPI team and the CDPP (Centre de Données de la Physique des Plasmas) for the distribution of the MMS/SCM data.
and if PI/coI are not part of the publication list, then we suggest to add Specifically, we acknowledge J. L. Burch for use of data from the MMS-SMART mission, B. Giles for use of FPI data.
For more informations about data rights and rules, see MMS Science Data center
The following paper should also be used to reference:
Pollock, C., T. Moore, A. Jacques, J. Burch, U. Gliese, Y. Saito, T. Omoto, L. Avanov, A. Barrie, V. Coffey, J. Dorelli, D. Gershman, B. Giles, T. Rosnack, C. Salo, S. Yokota, M. Adrian, C. Aoustin, C. Auletti, S. Aung, V. Bigio, N. Cao, M. Chandler, D. Chornay, K. Christian, G. Clark, G. Collinson, T. Corris, A. De Los Santos, R. Devlin, T. Diaz, T. Dickerson, C. Dickson, A. Diekmann, F. Diggs, C. Duncan, A. Figueroa-Vinas, C. Firman, M. Freeman, N. Galassi, K. Garcia, G. Goodhart, D. Guererro, J. Hageman, J. Hanley, E. Hemminger, M. Holland, M. Hutchins, T. James, W. Jones, S. Kreisler, J. Kujawski, V. Lavu, J. Lobell, E. LeCompte, A. Lukemire, E. MacDonald, A. Mariano, T. Mukai, K. Narayanan, Q. Nguyan, M. Onizuka, W. Paterson, S. Persyn, B. Piepgrass, F. Cheney, A. Rager, T. Raghuram, A. Ramil, L. Reichenthal, H. Rodriguez, J. Rouzaud, A. Rucker, Y. Saito, M. Samara, J.-A. Sauvaud, D. Schuster, M. Shappirio, K. Shelton, D. Sher, D. Smith, K. Smith, S. Smith, D. Steinfeld, R. Szymkiewicz, K. Tanimoto, J. Taylor, C. Tucker, K. Tull, A. Uhl, J. Vloet, P. Walpole, S. Weidner, D. White, G. Winkert, P.-S. Yeh, M. Zeuch (2016), Fast Plasma Investigation for Magnetospheric Multiscale, Space Sci. Rev., DOI: 10.1007/s11214-016-0245-4.	  
	

MMS1 FPI/DIS Vector of Data Quality Indicator Flag Flags at Burst Start Time

MMS1 FPI/DIS Compression Lossless/Lossy Indicator Flag at Survey Start Time

MMS1 FPI/DIS Step Table Parity, this Burst

MMS1 FPI/DIS Del-Phi (Observatory Spin Phase) Count at Burst Start Time

MMS1 FPI/DIS Del-Phi (Observatory Spin Phase) Angle at Burst Start Time

MMS1 FPI/DIS Ion Burst Survey Sky Map Azimuth Angle, Phi

MMS1 FPI/DIS Ion Burst Sky Map Azimuth Angle, Phi, Bin Delta Value

MMS1 FPI/DIS Ion Burst Sky Map Instrument Distribution. Column 1 Labels from MMS1_DIS_PHI_BRST: [sector00,sector01,sector02,sector03,sector04,sector05,sector06,sector07,sector08,sector09,sector10,sector11,sector12,sector13,sector14,sector15,sector16,sector17,sector18,sector19,sector20,sector21,sector22,sector23,sector24,sector25,sector26,sector27,sector28,sector29,sector30,sector31]. Column 2 Labels from MMS1_DIS_THETA_BRST: [5.6250 deg,16.875 deg,28.125 deg,39.375 deg,50.625 deg,61.875 deg,73.125 deg,84.375 deg,95.625 deg,106.88 deg,118.13 deg,129.38 deg,140.63 deg,151.88 deg,163.13 deg,174.38 deg]. Column 3 Labels from MMS1_DIS_ENERGY_BRST: [energy00,energy01,energy02,energy03,energy04,energy05,energy06,energy07,energy08,energy09,energy10,energy11,energy12,energy13,energy14,energy15,energy16,energy17,energy18,energy19,energy20,energy21,energy22,energy23,energy24,energy25,energy26,energy27,energy28,energy29,energy30,energy31].

MMS1 FPI/DIS Ion Burst Sky Map Instrument Distribution, 1-sigma Error. Column 1 Labels from MMS1_DIS_PHI_BRST: [sector00,sector01,sector02,sector03,sector04,sector05,sector06,sector07,sector08,sector09,sector10,sector11,sector12,sector13,sector14,sector15,sector16,sector17,sector18,sector19,sector20,sector21,sector22,sector23,sector24,sector25,sector26,sector27,sector28,sector29,sector30,sector31]. Column 2 Labels from MMS1_DIS_THETA_BRST: [5.6250 deg,16.875 deg,28.125 deg,39.375 deg,50.625 deg,61.875 deg,73.125 deg,84.375 deg,95.625 deg,106.88 deg,118.13 deg,129.38 deg,140.63 deg,151.88 deg,163.13 deg,174.38 deg]. Column 3 Labels from MMS1_DIS_ENERGY_BRST: [energy00,energy01,energy02,energy03,energy04,energy05,energy06,energy07,energy08,energy09,energy10,energy11,energy12,energy13,energy14,energy15,energy16,energy17,energy18,energy19,energy20,energy21,energy22,energy23,energy24,energy25,energy26,energy27,energy28,energy29,energy30,energy31].

MMS1 FPI/DIS Sector De-Spin P Value, this Burst

MMS1 FPI/DIS Ion Burst Sky Map Zenith Angle, Theta

MMS1 FPI/DIS Ion Burst Sky Map Zenith Angle, Theta, Bin Delta Value

MMS1 FPI/DIS Ion Burst Sky Map Parity 1 Energy

MMS1 FPI/DIS Ion Burst Sky Map Energy, Delta Value