spase://JAXA/NumericalData/Geotail/EPIC/ICS/PHA/PT0.0625S

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