Data Set Summary
================
Data Set ID: ULY-J-HISCALE-4-SUMM-LEMS120-V1.0
Instrument: HISCALE Low Energy Magnetic Spectrometer 120
Instrument P.I.: Louis J. Lanzerotti
Data Supplier: Thomas P. Armstrong
Data sampling rate: CRUISE: 1 hour, LEMS120: 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 consists of two files named:

CRUISE.TAB    1 hour averaged cruise data 1991-12-31 to 1992-02-01
LEMS120.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:
  '(a24,8(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,8(1x,1pe9.2))'

Data column descriptions
------------------------
time   a24      spacecraft event time in the format: yyyy-mm-ddThh:mm:ss.sssZ
P1     1pe9.2   ions (61-77 keV)
P2     1pe9.2   ions (77-127 keV)
P3     1pe9.2   ions (127-207 keV)
P4     1pe9.2   ions (207-336 keV)
P5     1pe9.2   ions (336-601 keV)
P6     1pe9.2   ions (601-1123 keV)
P7     1pe9.2   ions (1.123-1.874 MeV)
P8     1pe9.2   ions (1.874-4.752 MeV)

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 LEMS120

LEMS120 counts ions at 120 degrees from the space-craft 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