Data Set Overview
    =================
      NEAR EDR volume sets contain a single data set, from one instrument
      and one mission phase (defined in the phase table in /AAREADME.TXT).
 
      The data set directory structure is shown below. The first volume of
      the set is the only volume which contains CATALOG, DOCUMENT
      and other non-data subdirectories. Subsequent volumes contain
      only DATA and INDEX subdirectories in order to minimize duplication.
 
      Volume 1 directory structure:
 
          |-CATALOG--
          |
          |-DATA-----
          |
          |          |-INSTRUMENT-|-CALPAPER---
          |-DOCUMENT-|
          |          |-MISSION----|-OVERVIEW---
          |                       |-TECHDIGEST-
          |-GEOMETRY-
          |
          |-INDEX----
 
      Volume 2-n directory structure
 
          |-DATA-----
          |-INDEX----
 
 
      Directory Name  Description
      --------------  -------------
 
      CATALOG         Templates for the mission, instrument host,
                      instrument, and data set.
 
      DATA            Instrument FITS data files and data labels.
 
      DOCUMENT        Documentation of the instrument and mission  are
                      provide as ASCII text and may also be available in
                      the original PostScript, PDF or MMS Word format.
                      Articles from the Johns Hopkins APL Technical Digest
                      are provided for an overview of the NEAR mission.
                      The instrument subdirectory contains documentation
                      describing the instrument and the in flight
                      calibration of instrument data.
 
      GEOMETRY        This directory contains only a GEOMINFO.TXT file.
                      A separate GEOMETRY volume contains all of the SPICE
                      kernels in text transfer format for the mission phase
                      and the supporting the supporting documentation.
 
      INDEX           INDEX TABLES for this CD and the volume set
                      describing times and key data file parameter values.
 
     -------------------------------------------------------
 
 
    Parameters
    ==========
      The definitions for the image parameters and other keywords are
      given in the file NLRDEFINITIONS.TXT contained in the
      DOCUMENT/INSTRUMENT subdirectory.
 
 
    Data
    ====
      The data are in the form of FITS files with attached FITS headers
      and detached PDS labels. Files contain all data for one day.
 
 
    Ancillary Data
    ==============
      GEOMETRY subdirectory is described above.
 
 
    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 data file label includes a quality flag string in the
      DATA_QUALITY_ID keyword, 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.