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Ionospheric Values (Daily Work Sheets), F-Plots, Tabulations, Booklets,
Catalogs, and Log Books
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These ionospheric data consist of scaling notes, equipment usage logs, and
ionospheric values in the form of daily work sheets, F-Plots, tabulations, and booklets.
The station notes list the equipment used, power settings, frequencies used, equipment
problems, and other information about the equipment. The daily work sheets, commonly
referred to an 7E's, are the paper forms used for recording the scaled values values
of the ionospheric parameters. Tabulations and booklets contain
the published values by ionospheric parameter. If publication errors arise or are
suspected, the daily work sheets are usually consulted, if they are available.These
data are available from the National Geophysical Data Center (NGDC) as electrostatic
copies and some as imaged files. Most of the data are in the form of daily work sheets,
tabulations, and booklets. The booklets and tabulations have each ionospheric parameter
listed on one or two pages, depending upon the format. The daily
work sheets have one day (24 hours) of scaled ionospheric parameters on each sheet.
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