PDS_VERSION_ID        = PDS3
LABEL_REVISION_NOTE   = "2014-03-17, Initial"
RECORD_TYPE           = STREAM

OBJECT                = TEXT
   PUBLICATION_DATE     = 2014-03-17
   NOTE                 = "Description EXTRAS directory contents for the 
                           MSL Engineering Camera Mosaic PDS Data Archive"
END_OBJECT            = TEXT
END

EXTRINFO.TXT - the file you are reading.

The EXTRAS directory contains five subdirectories with supplementary products
for the Mosaic archive.

FULL/SOLxxxxx/ subdirectory:
Subdirectory of EXTRAS containing full resolution size (full-size) PNG 
versions of the mosaic image data products.

BROWSE/SOLxxxxx/ subdirectory:
Subdirectory of EXTRAS containing middle resolution size (browse-size) PNG 
versions of the mosaic image data products.

THUMBNAIL/SOLxxxxx/ subdirectory:
Subdirectory of EXTRAS containing low resolution size (thumbnail-size) PNG 
versions of the mosaic image data products.

ANCILLARY/SOLxxxxx/ subdirectory:
Subdirectory of EXTRAS which may contain brightness overlap and tiepoint 
files (.OVR, .TIE and/or .TPT extensions) corresponding to mosaics in the
equivalent DATA/SOLxxxxx directories.  See Section 5.2.1.13.3 of 
MSL_CAMERA_SIS.PDF for more detail on these files.