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    "Project": "NH>New Horizons",
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    "Discipline": [
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      "Space Physics>Interplanetary Studies"
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    "Data_type": "LCPS>Suprathermal Particles (Low Energy) Doubles Count per Second",
    "Descriptor": "PEPSSI>Pluto Energetic Particle Spectrometer Science Investigation",
    "File_naming_convention": "source_datatype_descriptor_yyyyMMdd",
    "Data_version": "01",
    "PI_name": "Dr. Ralph L.McNutt, Jr",
    "PI_affiliation": "Johns Hopkins University Applied Physics Laboratory",
    "TEXT": [
      "The New Horizons mission's Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) is made up of a time-of-flight (TOF)/mass spectrometer and the associated science investigation. The PEPSSI instrument is designed to measure pick-up ions, electrons, and other energetic ions energized by processes such as charge exchange of Pluto's escaping atmospheric neutrals with solar ions and photonsand by the expected bow shock resulting from the interaction between the solar wind plasma and the atmosphere. In addition to measurements in the Pluto/Charon system (closest approach planned for 14 July 2015), PEPSSI makes observations of energetic particles in the solar wind during the cruise to Pluto, and in 2007 made the most extensive energetic particle measurements in Jupiter's magnetotail as the spacecraft traveled over 1 AU down the tail. ",
      "L = Low energy rates 'doubles' time-of-flight (TOF) covers the lowest energy range particles events also overlaps with the 'triple' coincidence data",
      "S = Detector Sector number",
      "P = Calibrated assuming the particle is a proton",
      "Main publication: McNutt et al. 2008: The Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) on the New Horizons Mission",
      "Published: 25 October 2008",
      "Volume 140, pages 315-385, (2008)",
      "https://doi.org/10.1007/s11214-008-9436-y",
      "This particular dataset is related to 'Doubles', suprathermal (low energy) particle events counts per second, time-of-flight (TOF) only, ~2-250 keV/nuc He+ ",
      "The original datafiles: ",
      "PEPSSI_Reduced_LCPS_NNNN_M.csv",
      "where NNNN = year from 2012 to 2025, and ",
      "M = 'A' or 'B' is a calibration regime"
    ],
    "Instrument_type": [
      "Plasma and Solar Wind",
      "Particles (space)"
    ],
    "Mission_group": "New Horizons",
    "Logical_source": "new-horizons_pepssi_doubles-count-rate-tof-lcps-spectra-a",
    "Logical_file_id": "new-horizons_pepssi_doubles-count-rate-tof-lcps-spectra-a_00000000_v01",
    "Logical_source_description": "New Horizons Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) background corrected cosmic ray flux in calibration regime 'A' or 'B' ",
    "Time_resolution": "1 min",
    "Rules_of_use": "the PEPSSI are archived as fully citable data. Please consultPEPPSI team publications and personnel for further details on production, processing, and usage of these data",
    "Generation_date": "01/15/2025",
    "Acknowledgement": "Please acknowledge the PEPSSI  PI  Dr. Ralph L. McNutt, Jr",
    "LINK_TEXT": "Welcome to the PEPSSI team site",
    "LINK_TITLE": "Pluto Energetic Particle Spectrometer Science Investigation",
    "HTTP_LINK": "http://sd-www.jhuapl.edu/pepssi"
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