Data Set Summary
================
Data Set ID: ULY-J-HISCALE-4-SUMM-LEFS150-V1.0
Instrument: HISCALE Low Energy Foil Spectrometer 150 (LEFS150)
Instrument P.I.: L.J. Lanzerotti
Data Supplier: T. Armstrong
Data sampling rate: CRUISE: 1 hour, LEFS150: 15 minutes
Data Set Start time: 1991-12-31T00:00:00.000Z
Data Set Stop time: 1992-02-16T23:45:00.000Z

Naming convention
-----------------
This data set contains two data files named:

CRUISE.TAB    1 hour averaged cruise data 1991-12-31 to 1992-02-01
LEFS150.TAB   15 minute averaged encounter data 1992-02-02 to 1992-02-16

Record format
-------------
These files can be read according to the FORTRAN format statement:
  '(a24,7(1x,1pe9.2))'
where 'a24' is the time stamp in PDS format: yyyy-mm-ddThh:mm:ss.sssZ.
The individual elements of the time field can be read according to the 
statement:
  '(i4,4(1x,i2),1x,f6.3,1x)' year, month, day, hour, minute, seconds.
thus a record may be alternatively be read according to the format:
  '(i4,4(1x,i2),1x,f6.3,1x,7(1x,1pe9.2))'

Data column descriptions
------------------------
time   a24      spacecraft event time in the format: yyyy-mm-ddThh:mm:ss.sssZ
E1     1pe9.2   electron flux in 40-65 keV range
E2     1pe9.2   electron flux in 60-107 keV range
E3     1pe9.2   electron flux in 107-170 keV range
E4     1pe9.2   electron flux in 170-280 keV range
FP5    1pe9.2   ion flux in 540-765 keV range
FP6    1pe9.2   ion flux in 765-1223 keV range
FP7    1pe9.2   ion flux in 1.223-4.942 MeV range

Missing data flag value
-----------------------
Any data column whose value is -9.99e+10 is a missing data value.

Data Description
================

HI-SCALE 

   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.

   The instrument weighs 5.775 kg and uses 4.0 W of power.

About LEFS150

LEFS150 counts both electron and ions at 150 degrees from the 
space-craft 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