PDS_VERSION_ID                    = PDS3
RECORD_TYPE                       = STREAM
LABEL_REVISION_NOTE               = "NULL"

OBJECT                            = INSTRUMENT
  INSTRUMENT_HOST_ID              = "MDM"
  INSTRUMENT_ID                   = "M3SPEC"

  OBJECT                          = INSTRUMENT_INFORMATION
    INSTRUMENT_NAME               = "MARK III SPECTROGRAPH"
    INSTRUMENT_TYPE               = "OPTICAL SPECTROGRAPH"
    INSTRUMENT_DESC               = "

  Instrument Overview
  ===================
  The SMASS survey was carried out using the Mark III spectrograph,
  equipped with a TI 4849 CCD (398 x 598 pixels) with a
  low-resolution grism (150 line.mm, blazed at 7300 A) to cover the
  wavelength range from 4000 to 10000 A in a single exposure, with a
  dispersion of ~10 A/pixel.  A Wratten 12 filter (cutoff < 6000 A)
  was placed of the red spectral half of the CCD dewar window to
  block the second order spectral image.
 
 
  Scientific Objectives
  =====================
  The setup described above has the ability to image the entire
  spectrum in a single exposure and has many advantages over piecing
  together the different spectral regions from separate images.  In
  particular, the effects resulting from the asteroid's rotational
  lightcurve can be neglected when the entire spectral range is
  imaged simultaneously."

  END_OBJECT                      = INSTRUMENT_INFORMATION

  OBJECT                          = INSTRUMENT_REFERENCE_INFO
    REFERENCE_KEY_ID              = "XUETAL1995"
  END_OBJECT                      = INSTRUMENT_REFERENCE_INFO
END_OBJECT                        = INSTRUMENT
END