00README.txt
Updated 16 July 2019

The tar directory contains compressed tar files that contain the key
data files used to produce the EDPs in the CDF directory.  It should be
possible to use these files with Jackson's inversion software to recreate
the results; this would also allow alternative options or other inversion
software to be used for comparison.

Two versions of the X trace were scaled for each ionogram.  The lower edge
of the X trace was scaled as the "min" X trace.  Its inversion is considered
the primary result of the analysis.  The upper edge of the X trace was
scaled as the "max" X trace.  For a clean ionogram, the two traces should
be very close; when the trace is spread by a complex structured ionosphere,
the upper "edge" may be difficult to define but this trace could be regarded
as the limiting case for the ionogram.  The difference between the primary "min"
trace and the limiting "max" trace may be used as an indicator of ionospheric
disturbance.

The files included in each tar are:

edp-max.txt
The maximum or limit EDP result (true height and density) from Jackson's
inversion.

edp-min.txt
The minimum (primary) EDP result from Jackson's inversion.

edp.png
A summary plot of the two EDP curves.

is2_YYYYDDD_HHMM-fff-ann.png
The ionogram frame annotated with traces used in the inversions.

is2_YYYYDDD_HHMM-fff.png
The original ionogram frame.

nhinput-max.dat
Inversion input file for the maximum or limit traces.

nhinput-min.dat
Inversion input file for the minimum (primary) traces.

nhoutput-max.dat
Inversion output for the maximum or limit traces.

nhoutput-min.dat
Inversion output for the minimum (primary) traces.

otraces.png
Summary plot of the O traces, including both the scaled traces and the
O traces calculated by the Jackson inversion for comparison.

worldmap.out
Output of the worldmap ephemeris program for three points: start of the
ionogram, end of the ionogram X trace, and the end of the ionogram.

xTraceMax_fr.txt
X trace points used as input for the maximum (limit) case.

xTraceMin_fr.txt
X trace points used as input for the minimum (primary) case.