MMS Fast Plasma Instrument
SPEDAS provides command line and GUI access to the MMS FPI data.
Prior to using these data, please read the FPI Release Notes:
https://lasp.colorado.edu/galaxy/display/mms/FPI+Release+Notes
FPI Moments
For more complete examples, see the FPI crib sheets located in the /mms/examples/ folder.
Examples
Electron Moments Data
To load and plot the MMS1 FPI electron moments data on March 7, 2016:
MMS> mms_load_fpi, datatype='des-moms', trange=['2016-03-07', '2016-03-08'], probe=1
MMS> tplot, 'mms1_des_numberdensity_dbcs_fast'
MMS> tplot, ['mms1_des_energyspectr_omni_avg', 'mms1_des_pitchangdist_avg']
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MMS1 FPI electron density on March 7, 2016
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MMS1 FPI electron energy spectra and pitch angle distribution on March 7, 2016
Ion Moments Data
To load and plot the ion density, along with the omni-directional spectra on March 7, 2016:
MMS> mms_load_fpi, datatype='dis-moms', trange=['2016-03-07', '2016-03-08'], probe=1
MMS> tplot, ['mms1_dis_numberdensity_dbcs_fast', 'mms1_dis_energyspectr_omni_avg']
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MMS1 FPI ion density and energy spectra on March 7, 2016
To load the electron data:
MMS> mms_load_fpi, probe=1, trange=['2015-10-16/13:02:30', '2015-10-16/13:07:30'], data_rate='brst', datatype='des-dist'
To generate the pitch angle distributions (PADs), we also need spacecraft position and magnetic field data covering the time range:
MMS> mms_load_state, probes=1, trange=['2015-10-16/13:01:30', '2015-10-16/13:08:30']
MMS> mms_load_fgm, probe=1, trange=['2015-10-16/13:01:30', '2015-10-16/13:08:30']
Generate the energy spectra and pitch angle distributions:
MMS> mms_part_products, 'mms1_des_dist_brst', trange=['2015-10-16/13:02:30', '2015-10-16/13:07:30'], mag_name='mms1_fgm_b_dmpa_srvy_l2_bvec', pos_name='mms1_defeph_pos', outputs=['energy','pa']
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MMS1 FPI electron spectra and PAD on October 16, 2015
