Data Set Overview
    =================
      This data set contains X-Ray Spectrometer (XRS) observations
      made during the third cruise phase of the NEAR mission. The
      individual observations are combined into a single file per day
      for each sensor.
 
 
    Parameters
    ==========
      The data are presented as FITS binary tables (using the BINTAB
      extension) with detached PDS labels. The parameters listed in
      each table vary with observing sensor. The detailed descriptions
      of the various parameters included in the table are given in a
      separate documentation file, one for each sensor:
 
         XRFDEFINITIONS.TXT
         XRSDEFINITIONS.TXT
 
 
    Data
    ====
      The data are in the form of FITS files with attached FITS headers
      and detached PDS labels.  The data subdirectory has subdirectories
      for each instrument sensor.  Files contain all data for one day.
 
    Ancillary Data
    ==============
      Geometry data (pointing and attitude information) are provided
      for the entire NEAR mission as a separate data set.
 
 
    Media/Format
    ============
      This data set is released as a CDROM set.
 
 
    Processing History
    ==================
      The processing history includes no background, noise, geometry or
      other corrections.

Data Quality Flag
    =================
      Each observation includes a quality flag in the column named 'DQI'.
      This flag was extracted from the FITS keyword NEAR-008 of the
      original data label. The fields of this keyword are defined
      below.  Data quality defects flag is raised when there is missing
      data other fields informational and not quality related. The eight
      characters of this field are described below.
 
      Definition - Data Quality Index
                c0 = Data Quality Flag (0=good,1=flagged for quality
                     defects)
                c1 = Instrument number for FC, CTP and AIU (1 or 2)
                c2 - c6 = Processing Flags not quality related
                c7 = CCDS Source (0=VC0, 1=VC1, 2=VC2, 3=VC3)
 
    Review
    ======
      This data set underwent external peer review within PDS in June,
      2000.