PDS_VERSION_ID         = PDS3
RECORD_TYPE            = STREAM
OBJECT                 = TEXT
  PUBLICATION_DATE     = 2004-12-07
  INTERCHANGE_FORMAT   = ASCII
  NOTE                 = "Description of dustring directory contents."
END_OBJECT             = TEXT
END

Dustring directory:
-------------------

This directory contains VICAR-image files used to correct for dustrings
that are not found in the slope files created during ground calibration.

The file nac_dustring_venus.img was derived from Venus flyby data, and 
applies to all NAC images.

The file nac_mottle_1444733393.tif is a map of the "mottling" flatfield 
effect found in all NAC images after SCLK=1444733393.