Mex IMA protons density and velocity in SW is a subset of IMA ion moments dataset on applying an orbital restrictions. IMA ion moments are calculated in IRAP using Andrei Fedorov procedure.
IMA/MEX operates in two modes -16 / 2 elevation angles (averaged). In 2 elevations mode the quailty flag value is undefined (== 0). Normally the quality of IMA measurements in SW is good enough.
Density quality flag values:
Due to instrument limitations IMA/MEX measures protons with the energies higher than 1 keV. If possible the proton parameters are reconsructed from the ghost' distribution function.
To compare : MAVEN/SWIA - MEX/IMA for 90 episodes in SW when the distance between s/c is less than 1 Rm: density and velocity.