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From: oler@rho.uleth.ca (Cary Oler)
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Subject: BULLETIN: Monthly Reports & Note to Users of Ionospheric Data
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                           ADMINISTRATIVE BULLETIN

                                 18 May, 1993

                    Note to Users of the Ionospheric Data
                   Monthly Reports for April Now Available
                                 
                  /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\


NOTE TO USERS OF THE IONOSPHERIC DATA

     Over the last couple of months, there have been changes to the structure
of the daily reports of ionospheric data.  We are now providing M(3000)F2,
FMIN, Es, foF2, MUF(3000)F2, and TEC data in our daily reports.

     At the end of each month, we compile all of the updated and accumulated
ionospheric data, and archive the information into monthly archive files.
Formerly, we produced an individual TEC report exclusively summarizing
ionospheric total electron content.  This has changed.  The TEC data is now
integrated in with the rest of the ionospheric data when the monthly archives
are compiled.  You can therefore obtain a complete set of values for most of
the critical ionospheric parameters in a single monthly archive file.

     The daily ionospheric reports are made available for anonymous FTP from:
XI.ULETH.CA (IP number 142.66.3.29) in the directory "pub/solar/Iono".  Note
that the reports in this directory are NOT updated with new data as it
becomes available.  This may be implemented sometime in the future.  However,
for now, only the initial daily reports are provided therein.  At the end of
each month, the files in "pub/solar/Iono" are deleted and the archive file
for that month is provided in the directory "pub/solar/1993" under the
filenames "iono-xxx.[zip][zoo][tar.Z]", where xxx is replaced with the first
three characters of the month (ex. iono-apr.zip).

     Those who require full and relatively contiguous ionospheric data are
encouraged to use the monthly archive reports as opposed to the initial daily
reports.  Those who require ionospheric data on a regular timely basis are
encouraged to request access to our e-mail distribution list from:
Oler@Rho.Uleth.CA, or COler@Solar.Stanford.Edu.


MONTHLY REPORTS FOR APRIL ARE NOW AVAILABLE

     The monthly reports for April 1993 are now available through anonymous
FTP at the site: "XI.ULETH.CA" (IP number 142.66.3.29) in the directory
"pub/solar/1993".  The files to grab are:


 sgdb-apr.[zip][zoo][tar.Z] - Archive of April Solar & Geophysical Data

 iono-apr.[zip][zoo][tar.Z] - Archive of Ionospheric Data for April 1993

                 aprflr.doc - Monthly Report of Solar Energetic Events

                 aprrvw.doc - Monthly Review of Solar & Geophysical Activity


**  End of Bulletin  **


