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 9s
measurements which are usually separated by one or more 3s spin-periods.  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 13 energy channels: E = 19.34, 38.68, 58.03,
77.37, 96.71, 116.1, 193.4, 290.1, 425.5, 580.3, 773.7, 1006., and 1238. eV.
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 (the pitch-angle distributions for each energy channel, with 30
pitch-angle bins for each), and f_pitch_SPA (with 13 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.