OBJECT                         = INSTRUMENT
INSTRUMENT_HOST_ID             = ICE
INSTRUMENT_ID                  = EPAS

OBJECT                         = INSTRUMENT_INFORMATION
INSTRUMENT_NAME                = "ENERGETIC PARTICLE ANISOTROPY SPECTROMETER"

INSTRUMENT_TYPE                = "SPECTROMETER"
INSTRUMENT_DESC                = "

\v 
  Instrument Host Overview
  ========================
\v

  Energetic protons and heavy nucleons are detected by three identical charged-
particle telescopes aligned at different angles (30deg, 60deg and 135deg) to the 
spin axis which is perpendicular to the ecliptic plane. Each telescope consists 
of a 1 cm**2 solid-state detector of 30 micron thickness immediately followed by 
a 2 cm**2 detector of 150 micron thickness in anticoincidence. Pulse-height 
analysis resolves the particle total kinetic energies into eight channels between
35 keV and 1.6 MeV for protons. (These ranges are slightly mass-dependent for
heavy ions because of detector dead-layer effects.) The count rate from each 
telescope and each channel is resolved into eight sectors in the equatorial plane
to measure the anisotropy of the particles. A mechanical collimator defines a 
16 degree half-width viewing cone and a geometrical factor of 0.05 cm**2 sr for
each telescope. A magnetic broom prevents < 400 keV electrons from entering the
telescope while higher energy electrons trigger the second detector and so are
not counted.  To sample the three telescopes, eight energies and eight sectors, 
requires 32 s at 1024 bit/s.                                                                                                      
"
END_OBJECT                     = INSTRUMENT_INFORMATION                      

OBJECT                         = INSTRUMENT_REFERENCE_INFO
REFERENCE_KEY_ID               = "ESA-SP1066"
END_OBJECT                     = INSTRUMENT_REFERENCE_INFO

END_OBJECT     = INSTRUMENT                   
END