New Horizons Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) Jupiter Encounter Calibrated Data, Version 1.0

This data set contains Calibrated data taken by the
New Horizons Pluto Energetic Particle Spectrometer Science Investigation
(PEPSSI) instrument during the JUPITER ENCOUNTER mission phase. These data
were migrated from the PDS3 dataset: NH-X-PEPSSI-3-JUPITER-V1.1.

PEPSSI is a particle telescope and a time-of-flight (TOF) spectrometer that
measures ions and electrons over a broad range of energies and
angles. Particle composition and energy spectra are measured for H to
Fe from ~ 30 keV to ~1 MeV (but not all species are uniquely separated)
and for electrons from ~30 keV to 700 keV. PEPSSI comprises a
time-of-flight (TOF) section and a solid-state detector (SSD) array
that measures particle energy. The combination of measured energy and
TOF provides unique particle identification by mass and particle energy
depending on the range: for protons from ~30 keV to ~1 MeV; for heavy
(CNO) ions from ~80 keV to ~1 MeV. Lower-energy (>3 keV) ion fluxes are
measured by TOF only, but without the SSD signal, providing velocity
spectra at these energies as well. Due to storage and bandwidth
limitations, all event data cannot be stored or telemetered to the
ground. Instead, a round-robin algorithm is used to save Energy, TOF,
and timing data for select events. The common data products contain
these event and summary measurements, accumulated over fixed periods of
86,400 seconds, with each period in a single file comprising multiple
binary tables.

There are PEPSSI data in the Jupiter phase from day 6 to day 178
of 2007. This period can be separated into three sub-intervals:
upstream from day 6 to 50; encounter from day 50 to 68; tail
from day 68, to ~178. The divisions are arbitrary, but provide
a coarse characterization of the data taken during this phase.
Flux measurements clearly indicate the approach and recession of
NH from Jupiter, and PEPSSI's compositional measurements show,
H, He, O, and S, sulfur being a clear signature of Io's volcanic
activity. When the sun passed through the PEPSSI FOV, the
instrument was safed by ramping down the bias voltage and high
voltage. This period does include some tests designed to
investigate the instrument's performance under high-rate
conditions, but is dominated by data intended for scientific
study of Juptier's magnetosphere, deep magnetotail, and upstream
regions.

Labels were redesigned during migration using the .FIT header and PDS3 .LBL
files, but the data files are unchanged from their PDS3 version.