MMS Fast Plasma Instrument: Difference between revisions
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=== Electron Distribution Data === | === Electron Distribution Data === | ||
To load the electron data: | To load the FPI electron data: | ||
<div style="border: 1px solid LightGray; background-color:#F9F9F9; padding: 0px 10px; margin-left: 5px; margin-right: 5px;"> | <div style="border: 1px solid LightGray; background-color:#F9F9F9; padding: 0px 10px; margin-left: 5px; margin-right: 5px;"> | ||
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=== Ion Distribution Data === | === Ion Distribution Data === | ||
To load the FPI ion data: | |||
<div style="border: 1px solid LightGray; background-color:#F9F9F9; padding: 0px 10px; margin-left: 5px; margin-right: 5px;"> | |||
MMS> mms_load_fpi, probe=1, trange=['2015-10-16/13:02:30', '2015-10-16/13:07:30'], data_rate='brst', datatype='dis-dist' | |||
</div> | |||
To generate the pitch angle distributions (PADs), we also need spacecraft position and magnetic field data covering the time range: | |||
<div style="border: 1px solid LightGray; background-color:#F9F9F9; padding: 0px 10px; margin-left: 5px; margin-right: 5px;"> | |||
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'] | |||
</div> | |||
Generate and plot the ion energy spectra and PAD: | |||
<div style="border: 1px solid LightGray; background-color:#F9F9F9; padding: 0px 10px; margin-left: 5px; margin-right: 5px;"> | |||
MMS> mms_part_products, 'mms1_dis_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'] | |||
MMS> tdegap, '*_dis_dist_brst_*', /overwrite ; be sure not to interpolate through data gaps | |||
MMS> tplot, ['mms1_dis_dist_brst_energy', 'mms1_dis_dist_brst_pa'] | |||
</div> | |||
<gallery widths=300px heights=250px align="center"> | |||
Mms_part_products_ion_spec.png|MMS1 FPI ion spectra and PAD on October 16, 2015 | |||
</gallery> | |||
= FPI 2D Slices = | = FPI 2D Slices = | ||
Revision as of 15:05, 27 May 2016
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']
-
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']
-
MMS1 FPI ion density and energy spectra on March 7, 2016
FPI Distributions
SPEDAS can also be used to load and generate spectra from the FPI distribution functions.
Examples
Electron Distribution Data
To load the FPI 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 and plot the electron energy spectra and PAD:
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']
MMS> tdegap, '*_des_dist_brst_*', /overwrite ; be sure not to interpolate through data gaps
MMS> tplot, ['mms1_des_dist_brst_energy', 'mms1_des_dist_brst_pa']
-
MMS1 FPI electron spectra and PAD on October 16, 2015
Ion Distribution Data
To load the FPI ion data:
MMS> mms_load_fpi, probe=1, trange=['2015-10-16/13:02:30', '2015-10-16/13:07:30'], data_rate='brst', datatype='dis-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 and plot the ion energy spectra and PAD:
MMS> mms_part_products, 'mms1_dis_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']
MMS> tdegap, '*_dis_dist_brst_*', /overwrite ; be sure not to interpolate through data gaps
MMS> tplot, ['mms1_dis_dist_brst_energy', 'mms1_dis_dist_brst_pa']
-
MMS1 FPI ion spectra and PAD on October 16, 2015
