Explanatory notes:

The electron pitch-angle distributions included in this data set are derived
from sorting, by pitch (wrt B) and energy, the solar wind electron distributions
measured by the Wind/SWE electron instrument (see Ogilvie et al., "SWE, a
comprehensive plasma instrument for the Wind spacecraft", Space Sci. Rev., 71,
55, 1955).  Pitch-angle distrubutions, organized by energy, are computed from 3s
measurements which are spaced either 6s or 12s in time.  These quantities are
reliable and citable with caution, meaning that the PI advises that the user
should discuss their interpretations with a member of the SWE science team
before publishing.

The following comments are intended to aid in the use and interpretation of the
electron pitch-angle distributions reported in this data set.  For each 'energy
spectrum', observations are made at 16 energy channels ranging from about 10 eV
to as much as 3 keV.  The exact energies at which observations are made is time-
varying, and this data set reports the energy each channel observes (along with
the observations themselves) at any time.  The observations made at each energy
are sorted into pitch-angle bins, six degrees in width, from 0 degrees (flux
nearly parallel to B) to 180 degrees (flux nearly anti-parallel with B).  A
"spin-averaged" set of observations (aggregated from all pitch-angle bins, each
energy) is also reported, one value for each energy channel.  The value reported
for any bin (including the spin-averaged "energy bins") is given as a phase-
space density, f [#/{cc*(cm/s)^3}], averaged over contributing detectors.  The
data set reported here contains: f_pitch_E00, f_pitch_E01, f_pitch_E02,
f_pitch_E03, f_pitch_E04, f_pitch_E05, f_pitch_E06, f_pitch_E07, f_pitch_E08,
f_pitch_E09, f_pitch_E10, f_pitch_E11, f_pitch_E12, f_pitch_E13, f_pitch_E14,
f_pitch_E15 (the pitch-angle distributions for each energy channel, with 30
pitch-angle bins for each), and f_pitch_SPA (with 16 spin-averaged energy bins).
For reference, the electron speeds (|V|, in cm/s) corresponding to the energy
channels used, are reported in this data set.