The InSight IFG (InSight Fluxgate Magnetometer) data bundle contains several 
collections, each of which is briefly described below:

document: Documents that should be considered required reading
          for this bundle.
      Insight_IFG_SIS - This document describes the archive 
          contents and structure, from science objectives, to file naming
          conventions, to what's stored in byte 78 of file XXX.tab
      InSight_IFG_Data_Calibration_Description - This document
          describes the IFG ground and in-flight calibration and
          data processing. It also includes sections that describe 
          the types of artifacts that are found in the data and how
          they are documented and/or corrected.
       PolymonialFits - A text file that gives the time varying 
          polynomial coefficients that describe the diurnal corrections 
          applied to the IFG data.
       ReleaseNotes - A text files that describes the various 
          InSight data releases.

browse:   A collection of PNG plots of the 0.2Hz continuous data, one
          file per sol.
          
calib:   A collection of files (one per release) that contain the 
          corrections to the IFG data (delta-B's) that have been applied
          to the data, and the model and actual temperature and current
          values used to compute those corrections.
          
data-sc-engineering: A collection of spacecraft engineering and ancillary
          data parameters, many of which can be correlated with artifacts
          in the IFG data. Data are stored as ASCII tables with column
          headers in line 1.
          
data-ifg-raw: This collection contains the raw IFG magnetic field vectors
          and some of the ancillary data parameters that are required for
          data calibration and processing. Data are stored as ASCII tables 
          with column headers in line 1.
      
data-ifg-partially-processed: A collection of partially processed data. These
          data have been converted to units of nanoTesla and have had diurnal
          variations that are correlated with the spacecraft systems removed.
          Data are provided in IFG instrument and spacecraft coordinates. 
          Data are stored as ASCII tables with column headers in line 1.
          
data-ifg-calibrated: A collection of calibrated data files that are provided
          in spacecraft and geophysical (north, east, down) coordinates. Any
          artifact identification and removal that can be done at the time
          of a given InSight data release has been applied to these data. In
          addition, these files contain a data quality flag that tells the user
          what (if any) corrections have been applied to the data and which 
          artifact types remain present. Data are stored as ASCII tables 
          with column headers in line 1.