MMS Electron Drift Instrument

EDI Data in SPEDAS

The MMS EDI measures the electric and magnetic fields by tracking electron beams emitted by the instrument. SPEDAS provides command line and GUI access to the MMS EDI data.

Release notes can be found here:

https://lasp.colorado.edu/mms/sdc/public/datasets/fields/ (EDI Data Products Guide Rev 1.2)

For basic command line access see:

/projects/mms/examples/basic/mms_load_edi_crib.pro

EDI Data

L2

EDI l2 electric field and ExB drift velocity

To load EDI l2 data for MMS1 on December 23, 2015:

<syntaxhighlight lang="idl"> MMS> mms_load_edi, probes='1', data_rate='srvy', datatype='efield', level='l2', trange=['2015-12-23','2015-12-24']

MMS> tplot, 'mms1_edi_'+ ['e_gsm_srvy_l2', 'vdrift_gsm_srvy_l2'] </syntaxhighlight>

Quicklook

EDI quicklook electric field and ExB drift velocity - "bestarg" and "beam convergence" methods

To load EDI quicklook data for MMS1 on December 23, 2015:

<syntaxhighlight lang="idl"> MMS> mms_load_edi, probes='1', data_rate='srvy', datatype='efield', level='ql', trange=['2015-12-23','2015-12-24']

MMS> tplot, 'mms1_edi_'+ ['E_dmpa', 'E_bc_dmpa', 'v_ExB_dmpa', 'v_ExB_bc_dmpa'] </syntaxhighlight>