Data Set Overview
  =================
    This data set contains tables of time ordered, hourly averaged plasma
    parameters, mainly of the solar wind, as observed on the Moon at the
    Apollo 15 ALSEP site by the Apollo 15 Solar Wind Spectrometer (SWS)
    from 31 July 1971 through 30 June 1972, when the instrument failed.
 
 
  Data
  ====
    The hourly averaged SWS data tables are in fixed-width ASCII format.
    There is one table for each year the SWS recorded data.  During the
    local lunar night there was no solar wind signal so there are data
    gaps of about 15 days each lunation.
 
    Each table provides four sets of computed hourly parameters
    using as input data:  (1) all fine-time scale parameters (FTSP),
    (2) all FTSP computed from spectra with small root-mean-square (RMS)
    error on curve fitting and thermal speeds less than one-half the
    bulk velocity, (3) all FTSP computed from spectra that satisfy the
    requirements of criterion 2 as well as having only one flow angle
    that can be directly measured, and (4) all FTSP computed from spectra
    that satisfy the requirements of criterion 2 as well as having both
    flow angles directly measurable.  Contained in each of the four sets
    of averages are the proton density, alpha-to-proton ratio, bulk speed,
    angle of flow, number of spectra, and RMS deviations of each average.
 
    These data tables were converted from the CDF format which was created
    from the original binary data set PSFP-00084 by the NSSDC as part of
    the Lunar Data Restoration project.  The original tapes were written
    in BCD format on a UNIVAC 1108 computer.  See Clay, et al. (1972)
    [CLAYETAL1972], Goldstein, et al. (1973) [GOLDSTEINETAL1973] and Clay,
    et al. (1975) [CLAYETAL1975] for more information about the SWS plasma
    data from Apollo 15.
 
    This data set description was provided by the NSSDC.