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.