PDS_VERSION_ID    = PDS3
RECORD_TYPE       = STREAM
OBJECT            = TEXT
 PUBLICATION_DATE = 2010-02-01
 NOTE             = "Contents of the EXTRAS directory"
END_OBJECT        = TEXT
END 

This directory contains three Quicktime movies created from the FITS images
in this archive.

DUAL.MOV - This movie shows the PHOTDOC and PHOTGJON camera images side by 
side. The movie has been annotated with a scale bar showing the sky-plane
distance in kilometers, along with the UTC time of each frame. Also indicated
is the time from impact. The impact zone around the crater Cabeus is
highlighted. This sequence shows every fourth frame from the full FITS
image sequence. No processing was done on the images.

DUALSHIF.MOV - The previous movie, DUAL.MOV, shows noticeable image motion 
from distortions in the Earth's atmosphere. This version, DUALSHIF.MOV,
shows the image sequence after applying sub-pixel registration to the 
images relative to the first image. Effectively all of the image wander
has been removed. However, the correction does not remove the scale 
distortion, only the positional shifts. This image sequence is much steadier
but there is still some obvious variable distortion. The same enhancement
is used to highlight the Cabeus region.

DUALDIFF.MOV - This movie is constructed by subtracting the reference image
from each successive image that is seen in DUALSHIF.MOV. Outside of the
circle the image contrast is identical to the stretch used in
DUAL.MOV and DUALSHIF.MOV. Inside the circle, the stretch is enhanced by a 
factor of 3 to help search for a fainter signal.