Data Set Overview
  =================
  The Seven-color Asteroid Survey (SCAS) was conducted at the IRTF on Mauna
  Kea, Hawaii from 1992 to 1994.  It consists of photometry in seven
  filters from 0.9 to 2.3 microns, lettered A through G in order of
  increasing wavelength.  The bandpasses were specifically designed to
  capture the essential mineralogic information present in infrared
  asteroid spectra.  The filter bandpasses were chosen to avoid the
  atmospheric water features at 1.4 and 1.9 microns.  126 asteroids are
  included in this data set.
 
  Parameters
  ===========
  The reflectances have been normalized to band A, at 0.913 microns, and
  are thus referred to as B/A, C/A, D/A, E/A, F/A, and G/A.  The band
  difference B-D (actually the difference in the normalized values) is also
  tabulated as an indicator of band depth/continuum slope.  Also included
  are the RMS errors associated with each value.
 
  The B-D band difference is a strong indicator of the main source of
  variation in the SCAS data set.  In Clark, et al. (1995) [CLARKETAL1995]
  it is shown that B-D can be used to distinguish between typical S-class
  asteroid spectra and typical K-class spectra.  B-D essentially measures
  the depth of the 1-micron absorption feature, in which band B is located,
  as compared to the continuum just outside the 1-micron feature, where
  band D is located.
 
  Ancillary Data
  ==============
  The filter FWHM and center wavelengths are tabulated in the product
  label.
 
  References
  ==========
  Clark, B.E., J.F. Bell, F.P. Fanale, and D.J. O'Connor 1995. Results of
  the Seven-Color Asteroid Survey: Infrared Spectral Observations of ~50-km
  size S-, K-, and M-type asteroids. Icarus 113, 387-402.

Confidence Level Overview
  =========================
    The user is referred to the published paper, Clark, et al. (1995) for
    information on the confidence level of the data.
 
    Note:  The filter transmission curves published in [CLARKETAL95] show
    the factory specifications in filter transmissions for uncooled
    conditions. When cooled and placed inside the RC-2 dewar at the IRTF,
    the SCAS filter transmissions are decreased by at least 200n average,
    with no significant shift in band center position.