New Horizons PEPSSI Calibration Reference Files - Overview
=========================================================

Content
-------
This collection contains ancillary files used in the calibration of data 
Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) instrument for 
all phases of the New Horizons primary and extended missions. 

These files are not the result of PEPSSI observations. They contain a set of 
calibration files, including calibration coefficients, rate box definitions, 
and other calibration parameters used to process the raw data files delivered
by the PEPSSI instrument over the course of the New Horizons primary and extended 
missions. 

There are both current and prior versions of the rate box definitions that are 
valid over different time windows over the course of the missions. These rate 
boxes, and descriptions of relevant time periods over which they apply are 
provided within the relevant data label. 

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 PEPSSI 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
----------------------------
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.

2025-01-28 B. Sharkey