PDS_VERSION_ID      = PDS3
RECORD_TYPE         = STREAM

OBJECT              = TEXT
  PUBLICATION_DATE  = 2015-07-31
  NOTE              = "Description of contents of EXTRAS directory"
END_OBJECT          = TEXT
END

MSL ChemCam RDR EXTRAS Directory

The EXTRAS directory in this ChemCam archive contains the following 
additional material which may be of interest to the user.

RMI_MOSAICS - Directory containing ChemCam RMI mosaics of ChemCam Targets.
The ChemCam RMI mosaics are an assemblage of single RMI images into mosaics,
one for each target. The RMI images are stitched in chronological order using
image registration. LIBS or passive spectroscopy analysis performed in between
acquisition of images are located by red reticle annotations, and numbered in
chronological order. These annotated locations are determined based on the
rover mast angles measured during acquisition. Other information are provided
on the image, in particular distance and scale estimated using the motor step
in the ChemCam focusing mechanism.

RMI_CONTOUR_IN_MCAM_IMAGES - Directory containing RMI mosaics registered onto
the MastCam Image. The ChemCam RMI mosaic contour images consist of MastCam
M100 images documenting the same target with a red contour annotation to
highlight the location of the ChemCam RMI mosaic. The RMI mosaic is registered
onto the MastCam image using a key-point image registration algorithm to
estimate automatically the geometric transformation between the two images, so
the precise contour of the RMI mosaic is drawn. In case key-point registration
fails, the approximate location of the target is shown with a red circle,
based on a model using the mast angles measured during image acquisition.  In
addition, a scale is provided using the distance estimated by the motor step
in the ChemCam focusing mechanism. This scale applies only to the center of
the RMI mosaic highlighted by the red contour, or to the approximate location
in the red circle.


The EXTRAs directory formerly contained concatenated MOC data. These files
have been revised with Release 9 and moved to the directory DATA/MOC.