PDS_VERSION_ID                  = PDS3
RECORD_TYPE                    = STREAM
RELEASE_ID                     = 0001
REVISION_ID                    = 0000
OBJECT                         = TEXT
   PUBLICATION_DATE            = 2012-04-24
   NOTE                       = "Comments on VIRTIS VEx archive first delivery
                                 for the extended mission 4"
END_OBJECT                     = TEXT
END


COMMENTS ON VIRTIS VEx delivery archive for the extended mission 3, V1.0
S. Erard, 6/2011
F. Henry, 4/2012
F. Henry, 9/2012


1. Delivery

   This delivery contains data acquired during MTP 88 -> 110.
It includes raw data for all channels/transfer mode, including
calibrations and science observations, and several types of data
products: raw data, geometry files, auxiliary files.
Calibrated data files are included only for the H and M-IR channels.
The science team is not yet satisfied with the accuracy of the calibration
procedure for the M-visible channel, and feel that a release of calibrated
data at this stage would not satisfy the community either. 

   Raw data are generated through the final VIRTIS pipeline, as
described in the EAICD. Therefore, formatting and data content is
expected to be final, except for issues identified at the last minute
and indicated below. These issues will be addressed in a future revision.


2. Data

   Data and geometry files (data area and labels) are in their final form.
   In all instances, the scheduled operations have been performed and have
produced usable files at all level (ie data and geometry).

Calibrated dark frames for H, mentioned in the EAICD, are not included in
the archive at this stage.

A special code is used in data labels in some occasions, when -999.99
is used to flag an unknown / non-defined value where a digital value
is expected. Although this is not PDS-compliant, this solution has been
accepted by the PSA for obvious practical reasons.

MTPs 106 and 107 are not delivered : no VIRTIS observations were performed
during the arobraking operations.
MTP 111 is also no delivered : no VIRTIS observations were performed
due to the Superior Conjunction

3. Docs

   Docs have been updated relative to the previous test delivery, and reflect
the current state of the archive.


4. Index

     The main index is written by PVV '(pvv index).

     An alternative index is written from the data base in Meudon and is 
expected to be complete and compliant. It includes relevant parameters
for an advanced search into the archive.

   No geometry index is included, since the geolib software provided by
the PSA appears to produce non compliant files.

   Included is an index for the browse images. It has been generated
with PVV : 'pvv qlindex'. This index only lists the detached labels, and not
the .JPG images, for some unknown reason.


5. Other files

   The transfer function for M-visible is not yet available. A dummy one
(uniform frame) is provided for user's convenience.
Although it is perfectly usable in a calibration pipeline, it is considered
 a dummy flat-field because it provides no radiometric correction.