Data Set Overview
  =================
  The eight color asteroid survey provides reflectance spectra for minor
  planets using eight filter passbands.  This dataset includes the primary
  data obtained for 589 minor planets, the mean values for each minor
  planet included in the survey, the principal component scores derived
  from the primary data, the response curves, effective wavelengths, and
  bandpasses for the filters, and the coordinates and values determined for
  standard stars defining the system. With version 3.0, five additional
  files were added to provide, overall class color indices and albedos,
  eigenvalues, the color index correlation matrix and the component loading
  matrix.
 
  Data
  ====
  The compiled data are provided in ten ASCII data tables:
 
    ecas.tab     - Primary data
    ecasmean.tab - Mean values derived from primary data
    ecaspc.tab   - Principal component scores for each asteroid,
                   derived from the primary data
    ecasev.tab   - Eigenvectors used in computing the principal
                   component scores (version 3.0 and later)
    ecascm.tab   - The color index correlation matrix (version
                   3.0 and later)
    ecasclm.tab  - The component loadings matrix (version 3.0 and
                   later)
    colorind.tab - Average and extreme color indices for each
                   asteroid class (version 3.0 and later)
    classalb.tab - Average and extreme albedo values for each
                   asteroid class (version 3.0 and later)
    ecasstds.tab - Standard stars defining the ECAS photometric
                   system
    ecasband.tab - Effective wavelengths and bandpasses of the
                   filters
    ecasfltr.tab - Transmission curves for the eight filters
                   used, and transmission and reflectance curves
                   of the dichroic beam-splitter
 
 
  In addition, the mean spectra of the 'ecasmean.tab' file are also
  provided as individual spectrum files, one for each object.
 
 
  Modification History
  ====================
  Five new data files were added for version 3.0:
 
     1. classalb.tab
     2. colorind.tab
     3. ecasclm.tab
     4. ecascm.tab
     5. ecasev.tab

Confidence Level Overview
  =========================
  The RMS errors of the individual observations are included in the
  dataset.  The reliability of the data may be estimated by comparing
  multiple observations of each object.
 
 
  Review
  ======
  This dataset underwent a formal external review on May 10, 2002.