New Horizons LORRI Calibration Reference Files - Overview
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Content
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This collection contains ancillary files used in the calibration of data 
from the Long Range Reconnaissance Imager (LORRI) instrument for all
phases of the New Horizons primary and extended missions.

These files are not the result of LORRI observations. They consist of
flat fields, bad pixel maps, bias images, responsivity curves, and
similar products derived from the literature, ground testing, and so on.

There are both current and "superseded" versions of some calibration
products as a result of improvements in calibration algorithms and pipeline
processing over the coursr of the missions. The superseded versions are marked
as such and labeled as distinct products rather than the same product with an 
earlier version number. So while some of these files were "superseded" in terms
of what was used in later versions of the pipeline, they are not 
"superseded" in an archival sense because they are applicable to the
data produced using them.

The provenance for each ancillary file, as far as it is could be determined,
is included in the label for each product. The files were presumably 
collected by the LORRI team, but no attribution was provided in the PDS3 
data. The PDS4 migration was performed by SBN personnel, who are credited as 
editor of this collection.

PDS3 to PDS4 Migration Notes
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The PDS3 labels were not retained in the migrated PDS4 archive but are 
accessible in archival copies of the PDS3 datasets retained in the NSSDCA
deep archive.