DATA_SET_DESCRIPTION |
Data Set Overview
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This data set consists of HISCALE Low-Energy Foil Spectrometer
(LEFS) electron and ion counts at 150 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 LEFS150
LEFS150 counts both electron and ions at 150 degrees from the
spacecraft spin axis.
E1 40-65 keV electrons
E2 60-107 keV electrons
E3 107-170 keV electrons
E4 170-280 keV electrons
FP5 540-765 keV ions
FP6 765-1223 keV ions
FP7 1.223-4.942 MeV ions
HISCALE References (cited in [ARMSTRONG&SAHI1996])
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.
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