MMS-4 FPI DIS Level-2 Burst ion distribution functions (CDF)

https://doi.org/10.24400/802406/1tdh-208h

2022-07-07 14:05:25Z

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.

Online

CDF

Data Quality Error Flags

MMS4 FPI/DIS Vector of Data Quality Indicator Flag Flags at Burst Start Time

A Value of Zero signifies no Quality Errors. For Non-Zero Values: Bit-0=Manually flagged Interval, Bit-1=Overcounting/Saturation Effects likely present in Sky Map, Bit-2=Compression Pipeline Error

Compression Flag

MMS4 FPI/DIS Compression Lossless/Lossy Indicator Flag at Survey Start Time

Compression Loss Indicator, 0=Lossless, 1=Lossy

Step Table Parity

MMS4 FPI/DIS Step Table Parity, this Burst

The FPI/DIS alternates between two Tables, designated even (0) and odd (1).

Start Del-Phi Count

MMS4 FPI/DIS Del-Phi (Observatory Spin Phase) Count at Burst Start Time

Nominally, the Spin Phase Counts range over [0000,5759] Counts. Each Count represents 1/16 of a Degree (0.0625°) of Observatory Spin Phase. Zero Spin Phase Angle indicates that the Observatory +X-axis is aligned with the Sun Sensor Axis.

Start Del-Phi Angle

MMS4 FPI/DIS Del-Phi (Observatory Spin Phase) Angle at Burst Start Time

Nominally, the Spin Phase Angles range over [0°,360°). Each Count represents 1/16 of a Degree (0.0625°) of Observatory Spin Phase. Zero Spin Phase Angle indicates that the Observatory +X-axis is aligned with the Sun Sensor Axis.

°

0.0174532925>rad

Ion Sky Map Azimuth Angle, Phi

MMS4 FPI/DIS Ion Burst Survey Sky Map Azimuth Angle, Phi

Azimuth Angles in the Instrument Frame, i.e., the Azimuthal Angle of the Instrument Look Direction

°

0.0174532925>rad

Ion Sky Map Azimuth Angle, Phi, Delta Value

MMS4 FPI/DIS Ion Burst Sky Map Azimuth Angle, Phi, Bin Delta Value

Azimuth Angle Deltas

Ion Sky Map Distribution

MMS4 FPI/DIS Ion Burst Sky Map Instrument Distribution. Column 1 Labels from MMS4_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 MMS4_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 MMS4_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].

Azimuth Bin: Sector Index=00 looks after (Spin Phase) the Sun Direction, ..., Sector Index=31 looks before the Sun Direction. Head Field of View: Pixel Index=00 looks to Zenith, ..., Pixel Index=15 looks to Nadir. FPI Operations nominally bin Data from 64 Energy Filters into 32 pairwise Energy Bins, indexed 00-31. Nominally, Bins are indexed in increasing Energy Order. See the FPI Documents for Details.

s^3/cm^6

1.0e12>s^3/m^6

Ion Sky Map Distribution, Error

MMS4 FPI/DIS Ion Burst Sky Map Instrument Distribution, 1-sigma Error. Column 1 Labels from MMS4_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 MMS4_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 MMS4_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].

Azimuth Bin: Sector Index=00 looks after (Spin Phase) the Sun Direction, ..., Sector Index=31 looks before the Sun Direction. Head Field of View: Pixel Index=00 looks to Zenith, ..., Pixel Index=15 looks to Nadir. FPI Operations nominally bin Data from 64 Energy Filters into 32 pairwise Energy Bins, indexed 00-31. Nominally, Bins are indexed in increasing Energy Order. See the FPI Documents for Details.

s^3/cm^6

1.0e12>s^3/m^6

Sector De-Spin P Value

MMS4 FPI/DIS Sector De-Spin P Value, this Burst

This Variable records the P-Value used to De-Spin this Burst Sky Map onboard. See the FPI Documents for Details.

Ion Sky Map Zenith Angle, Theta

MMS4 FPI/DIS Ion Burst Sky Map Zenith Angle, Theta

Pixel Zenith Angles, i.e., the Polar Angle of the Instrument Look Direction

°

0.0174532925>rad

Ion Sky Map Zenith Angle, Theta, Delta Value

MMS4 FPI/DIS Ion Burst Sky Map Zenith Angle, Theta, Bin Delta Value

Pixel Zenith Angle Deltas

°

0.0174532925>rad

Ion Sky Map Energy

MMS4 FPI/DIS Ion Burst Sky Map Parity 1 Energy

Energies (Parity 0/1) in the 64-step FPI Energy Table

eV

1.602176565e-19>J

Ion Sky Map Energy, Delta Value

MMS4 FPI/DIS Ion Burst Sky Map Energy, Delta Value

Note that the Deltas are provided to indicate that the FPI is reporting the Energy Bin Centers. The Deltas do not necessarily reflect the Energy Bandwidth that is sampled by the FPI for a given Energy Step.

eV

1.602176565e-19>J