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.] ----------------------------------------------------------------