The mission, SWS instruments, data analysis applied
to the instrument outputs, and the data products are
extensively discussed in the Caltech report "ALSEP
Solar Wind Spectrometer Plasma  Data as Observed
at the Apollo 12 and 15 Landing Sites" by B.E. Goldstein,
D.R. Clay, C.W. Snyder and M. Neugebauer.  This
report is electronically accessible within NSSDC's Data
Set Catalog at
ftp://nssdcftp.gsfc.nasa.gov/documentation/old_data_doc/all_catalogs/dsc_0218_tif/ 

as files dsc_218_0008.tif through dsc_218_0034.dsc.
(There is one file per page of original document.)

A complementary site for ALSEP/SWS documentation 
is the Planetary Data System site at Washington University.  See
http://pds-geosciences.wustl.edu/lunar01/a12a-l-sws-4-solar-wind-1hr-avg-v1/a12sw_0002/
http://pds-geosciences.wustl.edu/lunar01/a15a-l-sws-4-solar-wind-1hr-avg-v1/a15sw_0002/

All physical parameters in each original 1-hr record
was captured from the PDS site at Washington U. to be provided
through the OMNIWeb-Plus and LunaSOX web pages of GSFC/SPDF.

It is especially important to understand that four sets
of hourly averages were created by the SWS team using 
differing criteria on which of the 28-s parameters should be 
included in the hourly averages.  Each of the 4 sets have 
the same parameters, and all four sets are included in the 
hourly records and made visible on the OMNIWeb-Plus and
LunaSOX pages.

The criteria for sets 1-4 were:

1.  If analysis of 28s spectra gave moments, these were included
in the averages

2.  Only spectra having small RMS error on curve-fitting (RMS < 20),
and only spectra yielding thermal speed < 1/2 of flow speed, were used. 

3.  Same criteria as for set 2, plus only data yielding exactly one 
flow direction angle were used.

4.  Same criteria as for set 2, plus only data yielding exactly two 
flow direction angles were used.

[As discussed in the above-cited references (see especially files
dsc_218_0008.tif and dsc_218_0008.tif of the first reference), there
was one Faraday Cup pointing up, and six surrounding the up-pointing 
one that pointed at 60 deg from the zenith.  Relative fluxes had to be 
seen in multiple Faraday Cups in order to derive flow direction angles.  
Without such determinations, the solar wind was assumed to flow from the 
solar direction.]
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