This directory contains the files which were used to produce the MEA
survey plots.  They are ZIPped and have to be unzipped.  Each file of
the form MEAnTXT.ZIP contains up to 100 files of the form SRVYnmm.TXT,
where n goes from 0 to 10 and mm goes from 0 to 99.  The value nmm is the
orbit number.  These .TXT files are 1-minute averages of each MEA
channel.  Zero order background correction and conversion to flux from
count-rates, using a "flat" spectrum GEF, has also been done.  The
parameters, in order, are:

Orbit Number, Year, Day of Year, Month, Day, U. T., Ch0 through Ch17, L,
B, B0, Longitude, Latitiude, and Altitude.  Ch16 is the background
channel and is in CPS. The other channels are in e-/cm2-sec-ster-keV.

Caution must be exercised if these files are used.  The background
correction which was used was appropriate only for 90 degree incidence.
It is a slight over-correction for other pitch-angles.  Therefore, in
general, there is an over-correction in the flux data.

In addition, the lowest three channels were at times saturated (folded-
over) due to the fact that each channel was limited to counting rates of
about 230,000 cps.  The "raw" data on these disks have been corrected for
this saturation effect. "Fold-over" corrected data are identified by an
instrument designation of "1001" in the header file.  The actual
instrument number was "1".  Uncorrected data files will have a "1" in their
header files.  THE DATA USED TO PRODUCE THE SURVEY PLOTS, i. e. these
.TXT files, WERE NOT "FOLDOVER" CORRECTED!

If you have any desire to use these averaged data, please contact me first.
It is very important that you ascertain that the use of these data will not
produce misleading or erronious results.  The simplest way to do that is to
call me and discuss it.

A. L. Vampola
(310) 375-1012