2.3.0 spase://JAXA/NumericalData/Geotail/EPIC/STICS/PHA/PT0.0625S Geotail EPIC STICS High-Resolution Pulse Height Analysis (PHA) Science Records 2021-03-10T20:13:28Z Geotail Energetic Particles and Ion Composition (EPIC) Data. EPIC is made up of five subassemblies: the Supra-Thermal Ion Composition Spectrometer (STICS) sensor, the STICS analog electronics, the Ion Composition System (ICS) sensor, the ICS analog electronics, and the Data Processing Unit (DPU). The STICS sensor provides ~4π angular coverage, composition and spectral observations, with charge state determination for all ions from 30 keV to 230 keV/e, and mass per charge measurements $gt;7.5 keV/e. The ICS sensor provides flux, composition, spectra, and angular distributions over two polar angles of the elemental species protons through iron from $gt;50 keV to 3 MeV along with angular distributions in one plane of electron fluxes >32 keV and >110 keV. The DPU provides the capability of numerous operating modes from which a small number will be selected to optimize data collection throughout the many phases of the Geotail mission. (1) References and descriptions of technical documents, which are provided as part of the archive delivery: - Kokubun, S., et. al. (1990). Geotail Interim Report (Section 1.6), SES-TD-90-201SY, Institute of Space and Astronautical Science, Tokyo, Japan. This prelaunch report presents the design of the Geotail project; Section 1.6 is devoted to EPIC. Note: only a photocopy of the EPIC Section 1.6 of this report will be provided. - Hestermeyer, A., et al. (1991). Geotail/EPIC DPU (Data Processing Unit) software users guide, Technische Universitat Braunschweig/Institut fur Datentechnik und Kommunikationsnetze, Brunswick, Germany. This document provides detailed information on DPU operation. - Schlemm, C. E., et al. (1993). Geotail/EPIC instrument user's manual, The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland. This document provides a detailed description of the EPIC instrument for telemetry interpretation and instrument control and commanding. It provides detail information on the instrument telemetry. - Nylund, S. (2006). Geotail/EPIC ground-based data conversions and corrections, The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland. This document provides detailed information on the ICS and STICS sensors and describes the ground-based data conversions and corrections of compress rate counts. - Nylund, S. (2014). Geotail/EPIC instrument and data analysis caveats, The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland. This document describes the cautions of the EPIC instrument and the use of its measurement datasets. - EPIC Bibliography: a list of publications and presentations related to EPIC. (2) References and descriptions to journal articles: - Nishida, A. (1994). The Geotail Mission, Geophys. Res. Lett., 21, 2871-2873, 1994. (Mission paper: An introductory article to the Geotail spacecraft mission). - Williams, D. J., R. W. McEntire, C. Schlemm II, A. T. Y. Lui, G. Gloeckler, S. P. Christon, F. Gliem (1994), Geotail energetic particles and ion composition instrument, J. Geomag. Geoelect., 46, 39-57, 1994. (Instrument paper - A description of EPIC the instrument, its operation, and early mission results). - Eastman, T. E., S. P. Christon, et al. (1998). Magnetospheric plasma regimes using Geotail measurements 1: Regime identification and distant tail variability, J. Geophys. Res., 103, 23503-23520, 1998. - Christon, S. P., T. E. Eastman, et al. (1998). Magnetospheric plasma regimes using Geotail measurements 2: Statistics, spatial distribution, and geomagnetic dependence, J. Geophys. Res., 103, 23521-23542, 1998. (Regime ID papers: Complementary papers that together describe the RID identification process, Eastman, et. al., and the overall characteristics of the RID data set, Christon, et. al.). - Note: Additional journal articles related to EPIC are given in the EPIC bibliography Please acknowledge Anthony T. Y. Lui. The work to collect, process, and archive this data product was supported by NASA grants to The Johns Hopkins University Applied Physics Laboratory. spase://SMWG/Person/Anthony.T.Y.Lui PrincipalInvestigator spase://SMWG/Person/Stephen.P.Christon CoInvestigator DataProducer spase://SMWG/Person/Robert.E.McGuire MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact spase://SMWG/Person/Stuart.R.Nylund DataProducer Description of EPIC STICS PHA data product https://spdf.gsfc.nasa.gov/pub/data/geotail/epic/documents/EPIC_STICS_PHA_data_product_description.pdf EPIC/STICS Pulse Height Analysis (PHA) Data Product Description Description of EPIC instrument and PHA data https://spdf.gsfc.nasa.gov/pub/data/geotail/epic/documents/Geotail_EPIC_conversion_doc.pdf Overview of the Geotail EPIC Instrument and of the Geotail Mission and a Description of the Ground-Based Data Conversions and Corrections for this Instrument Geotail EPIC Instrument Description https://www.jstage.jst.go.jp/article/jgg1949/46/1/46_1_39/_pdf D. J. Williams, et al., GEOTAIL Energetic Particles and Ion Composition Instrument, J. Geomag. Geoelectr., 46, 39-57, 1994 JHU/APL Geotail/EPIC Science Data Center (SDC) http://sd-www.jhuapl.edu/Geotail/ The SDC is the Central Processing and Analysis Facility for the Geotail EPIC Particle Instrument, One of Seven Instruments in the Geotail Mission spase://VSPO/NumericalData/Geotail/EPIC/STICS/PHA/PT0.0625S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/geotail/epic/stics_pha_ascii_gzip/ In ASCII Format via ftp from SPDF HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/geotail/epic/stics_pha_ascii_gzip/ In ASCII Format via http from SPDF Text.ASCII GZIP Please acknowledge Anthony T. Y. Lui and CDAWeb when using these Data spase://SMWG/Repository/JHU_APL Online Open EPIC STICS PHA Survey Plots http://sd-www.jhuapl.edu/Geotail/summary_images.html Geotail EPIC Summary Images GIF Calibrated spase://SMWG/Instrument/Geotail/EPIC EnergeticParticles 1992-10-18T00:00:00 2010-12-31T23:59:59 PT0.0625S Earth.Magnetosheath Earth.Magnetosphere Earth.Magnetosphere.Magnetotail Earth.Magnetosphere.Main Earth.Magnetosphere.RadiationBelt Earth.NearSurface.EquatorialRegion Earth.NearSurface.Plasmasphere Heliosphere.NearEarth The Cadence of this Data Set has been set equal to 0.06125 s. While On-Board Sampling does happen every 3 s, the Results can vary over a Range from a Maximum of 48 events per 3 s to no events within 3 s. The Resultant Ground-Processed PHA Data end up having an Irregular Cadence Year (YYYY) Column_1 Year, YYYY = Gregorian Year AD PT0.0625S year I4 1992 2040 Temporal Day of Year (DOY) Column_2 Day of Year, DOY - Day 1 = Jan 1 PT0.0625S d 86400>s I3 001 366 Temporal Hour (HH) Column_3 Hour, HH = Hour of Day PT0.0625S h 3600>s I2 01 23 Temporal Minute (MM) Column_4 Minute, MM = Minute of Hour PT0.0625S min 60>s I2 01 23 Temporal Second (SS.S) Column_5 Second, SS.S = Second of Minute PT0.0625S s F4.1 00.0 59.9 Temporal Engineer Data Block (EDB) Number Column_6 Raw Engineering Data: Engineer Data Block (EDB) Number This Parameter is a Raw Engineering Measurement included in this Data Product for completeness PT0.0625S I3 0 31 Other Deflection Voltage (DV) Step Number Column_7 STICS Deflection Voltage (DV) Step Number For most of the Mission, STICS Cycles among the DV Steps in eight Decrements of four from Steps 30 to 2 (i.e., 30, 26, 22, 18, 14, 10, 6 and 2) in 24 s. The Exception is that from 2005-11-21 02:12:00 to 2007-02-26 17:13:18 STICS cycled in 32 Decrements of one from Steps 31 to 0 (i.e., all 32 Steps) in 96 s. PT0.0625S I2 0 31 InstrumentMode Sector (SE) Number Column_8 This Parameter indicates the Sector (SE) Number of the Sensor$apos;s Equatorial Look-Direction Each Sector is 22.5° Wide. From Launch to 1993-01-29 10:04 UT, Sector 0 is Sunward-looking and 12 is Dawnward-looking. Thereafter, Sector 14 is Sunward-looking and 10 is Dawnward-looking. In either Case, the Center of the Sunward-looking Sector is rotated 9.5° off Center towards Dawn for STICS (3.75° for ICS). PT0.0625S I2 0 15 Other Identification Parameter (ID) Number Column_9 Raw Engineering Data: Identification Parameter (ID) Number The Identification Parameter (ID) Number is a Raw Engineering Measurement included in this Data Product for Completeness PT0.0625S I2 0 30 Other Solid State Detector (SD) Number Column_10 Raw Engineering Data: Solid State Detector (SD) Number indicating Sensor's Polar Look-Direction (where 1 is the South Detector Head, 2 is the Equatorial Detector Head, 3 is the North Detector Head, and 0 is Indeterminate) This Parameter is a Raw Engineering Measurement included in this Data Product for Completeness PT0.0625S I2 0 3 Other Energy Channel (ECH) Number Column_11 Raw Engineering Data: Energy Channel (ECH) Number This Parameter is a Raw Engineering Measurement included in this Data Product for Completeness PT0.0625S I4 0 1023 Other Time-of-Flight Channel (TCH) Number Column_12 Raw Engineering Data: Time-of-Flight Channel (TCH) Number This Parameter is a Raw Engineering Measurement included in this Data Product for Completeness PT0.0625S I4 0 1023 Other Front or Start (ST) Micro Channel Plate ID Number Column_13 Raw Engineering Data: The Front or Start (ST) Micro Channel Plate ID Number indicates the Sensor$apos;s Polar Look-Direction Each Head is 26.6° Wide. ST ID Number: 1 is the North Polar Head, 2 is the North Equator Head, and 7 is from the Double Coincidence of both North Heads; 3 is the Equator North Head, 4 is the Equator South Head, and 8 is from the Double Coincidence of both Equator Heads; 5 is the South Equator Head, 6 is the South Polar Head, and 9 is from the Double Coincidence of both South Heads; 0 and 10 are for Indeterminate Look-Directions. PT0.0625S I2 0 10 Other Rear or Stop (SP) Micro Channel Plate ID Number Column_14 Raw Engineering Data: The Rear or Stop (SP) Micro Channel Plate ID Number This Parameter is a Raw Engineering Measurement included in this Data Product for Completeness PT0.0625S I2 0 3 Other PHA Range (R) ID Number Column_15 Raw Engineering Data: The PHA Range (R) ID Number indicates the Basic Rate Sampling Range, where 0 is BR0, 1 is BR1, 2 is BR2, and 3 is Indeterminate This Parameter is a Raw Engineering Measurement included in this Data Product for Completeness PT0.0625S I2 0 3 Other Mass Per Charge (MPQ) Ratio Column_16 Atomic Mass per Charge (MPQ) Ratio of the Ion PT0.0625S u/e F6.3 0 98.99 Other Ion Ratio Unified Atomic Mass Unit (MASS) Column_17 The Unified Atomic Mass Unit of the Ion For Ions without sufficient Energy Deposition, Em, measured above the STICS SSD$apos;s Electronic Threshold, an Energy Deposit Measurement is not recorded; and the EPIC Data Processing Unit (DPU) classifies this Event with a Zero Mass and a Non-Zero Mass Per Charge (MPQ) as a "Double" (i.e., $quot;Two Measurement" or, synonymously termed, "Zero Mass" PHA Event PT0.0625S u F5.2 0 98.99 Ion Mass