New Horizons Solar Wind Around Pluto Trajectory Files - Overview
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Content
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This collection contain New Horizons (NH) spacecraft trajectory in various 
reference frames for the primary and extended missions.

The sampling period is 86400 NH spacecraft seconds, about one day, over
the time period from launch through the end of 2028. The data will contain
placeholder flags for some (future) dates where we do not have enough
information to predict the spacecraft location accurately. Locations before
2022-JUN-01 01:36:23.288 come from 'reconstructed' SPICE kernels, whereas
later locations are estimated from 'predicted' SPICE kernel information.

The reference frames included are
  Heliocentric Aries Ecliptic Date (HAE_DATE) a.k.a. Solar Ecliptic (SE) Date, 
  Heliocentric Aries Ecliptic J2000 (HAE_J2000) a.k.a Solar Ecliptic (SE) J2000,
  Heliocentric Earth Ecliptic (HEE), 
  Heliocentric Earth Equatorial (HEEQ) a.k.a. Stonyhurst heliographic,
  Heliographic Inertial (HGI) a.k.a. Heliocentric Inertial (HCI),
  Heliographic (HG) a.k.a. Heliocentric Inertial (HCI) or Carrington system, 
  J2000, 
  Jupiter International Astronomical Union (IAU_JUPITER), 
  Jupiter J2000, 
  Pluto International Astronomical Union (IAU_PLUTO), and
  Pluto J2000.

The data were presumably prepared by the SWAP team.  In the PDS3 data, the 
Producer Institution Name was listed as Southwest Research Institute.  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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In PDS3, these files were supplied as one concatenated file.  There were 
multiple versions that were updated with each release.  For the migrated 
PDS4 archive, only a single instance of each version of each file was retained. 

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.


2024-10-04, P. Lawton