Overview
The SPEDAS software suite has a variety of methods to display the FPI Quality Flags.
The quality flags are contained in the FPI DES/DIS Moment and Distribution files as a 32-bit unsigned integer with each bit acting as an on/off flag of the data-quality indicators as of the epoch start time. The procedure MMS_LOAD_FPI.pro automatically parses the errorflags variable in the CDF file into a tplot variable that can be displayed fairly easily.
The CDF variable errorflags become TPLOT variables of the form:
'mms'+this_probe+'_dis_errorflags_'+data_rate+suffix+'_moms' ;ion moments
'mms'+this_probe+'_des_errorflags_'+data_rate+suffix+'_moms' ;electron moments
'mms'+this_probe+'_dis_errorflags_'+data_rate+suffix+'_dist' ;ion distributions
'mms'+this_probe+'_des_errorflags_'+data_rate+suffix+'_dist' ;electron distributions
Quality Flag Queries
SPEDAS example of use: see crib sheet /projects/mms/examples/basic/mms_load_fpi_crib.pro
tplot, prefix+'_dis_errorflags_fast_moms_flagbars', /add
tplot, prefix+'_dis_errorflags_fast_moms_flagbars_full', /add
