Ulysses Jupiter Encounter HISCALE LEMS Ion Counts at 30 and 120 Degrees Data Description Ulysses HISCALE - Heliospheric Insta-Spectra, Composition, Anisotrophy at Low Energy Bundle PDS3 DATA_SET_ID = ULY-J-HISCALE-4-SUMM-LEMS30-V1.0 PDS3 DATA_SET_ID = ULY-J-HISCALE-4-SUMM-LEMS120-V1.0 ORIGINAL DATA_SET_NAME = ULYSSES JUPITER HISCALE LEMS 30 ION COUNTS ORIGINAL DATA_SET_NAME = ULYSSES JUPITER HISCALE LEMS 120 ION COUNTS START_TIME = 1991-12-31T00:00:00.000 STOP_TIME = 1992-02-16T23:45:00.000 PDS3 DATA_SET_RELEASE_DATE = 1998-05-01 PRODUCER_FULL_NAME = THOMAS P. ARMSTRONG Collection Overview ================= This collection consists of HISCALE Low-Energy Magnetic Spectrometer (LEMS) ion counts at 30 and 120 degrees from the spacecraft spin axis. These measurements were taken during the Ulysses Jupiter encounter 1991-12-31 to 1992-02-16, and include 1 hour averaged inbound cruise data (1991-12-31 to 1992-02-01), and 15 minute averaged encounter data (1992-02-02 to 1992-02-16). The Heliosphere Instrument for Spectra, Composition, and Anisotropy at Low Energies is designed to make measurements of interplanetary ions and electrons throughout the entire Ulysses mission. The ions (Ei > 50 keV) and electrons (Ee > 30 keV) are identified uniquely and detected by five separate solid-state detector telescopes that are oriented to give nearly complete pitch-angle coverage from the spinning spacecraft. Ion elemental abundances are determined by a del E vs E telescope using a thin 5 micrometer front solid state detector element in a three element telescope. Experiment operation is controlled by a microprocessor-based data system. Inflight calibration is provided by radioactive sources mounted on telescope covers which can be closed for calibration purposes and for radiation protection during the course of the mission. Ion and electron spectral information is determined using both broad-energy-range rate channels and a 32 channel pulse-height analyses (channels spaced logarithmically) for more detailed spectra. About LEMS30 LEMS30 counts ions at 30 degrees from the spacecraft spin axis. P1 56-78 keV ions P2 78-130 keV ions P3 130-214 keV ions P4 214-337 keV ions P5 337-594 keV ions P6 594-1073 keV ions P7 1.073-1.802 MeV ions P8 1.802-5.0 MeV ions About LEMS120 LEMS120 counts ions at 120 degrees from the spacecraft spin axis. P1 61-77 keV ions P2 77-127 keV ions P3 127-207 keV ions P4 207-336 keV ions P5 336-601 keV ions P6 601-1123 keV ions P7 1.123-1.874 MeV ions P8 1.874-4.752 MeV ions References: ======== Armstrong, T.P., S.E. Hawkins, G. Shelley, HISCALE Data Analysis Handbook, JHU Applied Physics Laboratory, 1991. Armstrong, T.P., and R. Sahi, Ulysses HISCALE Data Analysis Handbook, Dept. of Physics and Astronomy, Univ. of Kansas, Lawrence, KS, 66045, April 1996. Cheng, A.F., A Model of Convection and Corotation in Jupiter's Magnetosphere: Ulysses Predictions, Geophys. Res. Lett., 19, 221, 1992. (https://doi.org/10.1029/92GL00122) Curtis, D.W., ISPM/Ulysses LAN Data Processing Software Status, Dec. 1986. Gold R.E., LAN Accelerator Calibration Test Plan, August 1991. Guynn D.R. Jr., LAN Experiment Data System Performance and Interface Specification, June 1992. Kohl, J.W., J.H. Crawford, Calibration of Solar Polar Energy Model LAN-2B Detector Head at GSFC Low Energy Accelerator, July 1986. Simnett, G.M., R.E. Gold, The RTG Background in the LAN Experiment and the Shielding Required to Control It, April 1980. Tappin, S.J., HSIO-HiScale I/O Library, June 1991. Ximenez de Ferran S., Ulysses Spin Reference Pulse, May 1985.