Clicking on the Plot Options button in the Main User Interface Menu brings up the Plot Definition Interface Menu shown below.
The menu holds definitions for the various plots that can selected to be output providing options to control some of the aspects related to the plots. There are several options which are common to all plots. These are grouped in the block of options in the upper portion of the menu. Additional plot specific Options are grouped together in the lower portion of the menu.
The actions and options defined through the Plot Definition Interface are described below.
Allows control of the size of the plot windows. With a zoom of 1.0 the plot windows attempt to maximize usage of the area on the screen, essentially filling the screen if possible. Smaller values produce smaller plot windows, larger values produce larger plot windows. Values larger than 1 may produce windows which exceed the screen size.
Closes the menu. It can be reopened by clicking on the Plot Options button in the main interface menu.
The following table describes the plots which can be selected to be outout.
| PLOT | DESCRIPTION |
|---|---|
| Measured Image | The measured EUV image after the background removal and despeckling algorithms have been applied. |
| Simulated Image | The synthetic image produced by tracing the lines of sight of the EUV instrument through the final density map obtained in the inversion. |
| L Shell | A plot of the L-Shell values at the closest approach to the Earth for each line of sight. This plot is basically a debug plot. |
| Ratio |
The deviation of the synthetic image from the measured image
computed as:
R = (mI - sI) / mI
where mI is the measured image, and sI is the synthetic image.
R is set to a large negative value for the pixels in which mI
is zero unless mI is also zero in which case it is set to zero.
|
| SM Measured Image | A plot of the EUV measured image which has been remapped into the SM equatorial plane. The plot can be remapped into either a polar or rectangualr coordinates grid. |
| Plasmasphere | The plot of the He+ density map in the SM equatorial plane. |
| Radial Gradient |
A plot of the radial gradient in the He+ density in
the SM equatorial plane. This is computed from the cartesian
density mesh as:
rG = dD/dr
where rG is the radial gradient, D is the He+ density and
r is the radius in RE. The plot is generally not very
informative unless it is decimated or heavily smoothed.
|
| Azimuthal Gradient |
A plot of the azimuthal gradient in the He+ density in
the SM equatorial plane. This is computed from the cartesian
density mesh as:
aG = 1/r · dD/d&phi
where aG is the azimuthal gradient, D is the He+ density and
&phi is the geomagnetic longitude angle in radians.. The plot is generally
not very informative unless it is decimated or heavily smoothed.
|
| Radial Cuts | A plot of radial cuts through the He+ density in the SM equatorial plane. Plots show the He+ density as a function of RE at fixed geomagnetic longitudes (MLT). |
| Raw He+ Matrix | A plot of the He+ density mesh at various steps in the iteration prior to the filling of the unset grids. This plot shows only the assigned intensities at the variable grids in the mesh. |
| Smoothed He+ Matrix | A plot of the He+ density mesh at various steps in the iteration after the filling of the unset grids. This plot shows the He+ density profile as it used in the creation of the synthetic images. |
| Zero Matrix | A plot of zero solution matrix. Matrix values are either 0 or 1. A value of 0 indicates position in the geomagnetic equatorial plane which are known to have zero density. |
With the exception of the SM Measured Image this is a NO/YES toggle button which indicates if the plot is to be output or not. For the SM Measured Image this is a option button with the options NO for no plot, XY for a plot which has been remapped into rectangualr coordinates, and PT for a plot which has been remapped into polar coordinates.
If a plot is being output, what window should it be output to. Plots can be grouped together on a single page. When doing this it is generally best to group plots which have a common axis scaling. In general the Measured Image, Simulated Image, L-Shell and Ratio plots have a common range as do the Plasmasphere, Radial Gradient, and Azimuthal Gradient Plots. The remaining plots are best plotted in their own window.
The minimum value to assign to the colorbar associated with the plot.
The maximum value to assign to the colorbar associated with the plot.
The scaling to assign to the colorbar associated with the plot. This is either LOG or LINEAR as set by the toggle button.
If YES a Png file of the plot is produced. This requires the ImageMagick convert routine be on the system. If not the plot will be output as a postscript file. NOTE: Plot files contain individual plots and not all files in an individual window.
Plot file names have the format IDYYYYDDDHHMMSS_N.ext where ID is the plot identifier, YYYY, DDD, HH, MM, SS are the starting year, day of year, hour, minute, and second, of the plot respectively, N is an instance counter, and. ext is either .png or .ps depending on the file type. The plot identifiers are given in the following table.
| PLOT | ID | FILE |
|---|---|---|
| Measured Image | mi | miYYYYDDDHHMMSS_N.png (or .ps) |
| Simulated Imag | si | siYYYYDDDHHMMSS_N.png (or .ps) |
| L Shell | ls | lsYYYYDDDHHMMSS_N.png (or .ps) |
| Ratio | ra | raYYYYDDDHHMMSS_N.png (or .ps) |
| Plasmasphere | ps | psYYYYDDDHHMMSS_N.png (or .ps) |
| Radial Gradient | rg | rgYYYYDDDHHMMSS_N.png (or .ps) |
| Azimuthal Gradient | ag | agYYYYDDDHHMMSS_N.png (or .ps) |
| Radial Cuts | rc | rcYYYYDDDHHMMSS_N.png (or .ps) |
| Raw He+ Matrix | rm | rmYYYYDDDHHMMSS_N.png (or .ps) |
| Smoothed He+ Matrix | sm | smYYYYDDDHHMMSS_N.png (or .ps) |
| Zero Matrix | zm | zmYYYYDDDHHMMSS_N.png (or .ps) |
For plots which are output in the geomagnetic equatorial plane this is the (X,Y) coordinates of the lower left-hand corner of the plot in RE. The plots are always output in a square format with the upper right-hand coordinates given by MinR - 2 · MinR. A positive MinR puts the sun to the left in the plots and evening downward. A negative MinR puts the sun to the right and evening at the top of the plot.
Allows the plot to be smoothed or sharpened before displaying it. The filter algorithm is always run after the decimation algorithm should the plot be decimated. Clicking on the filter button brings up a number of options which are described in the table below.
| OPTION | DESCRIPTION |
|---|---|
| NO | No smoothing filter is defined and the smoothing algorithm is turned off. |
| 3x3L | Image is smoothed using a 3x3 low pass filter. |
| 5x5L | Image is smoothed using a 5x5 low pass filter. |
| 3x3H | Image is smoothed using a 3x3 high pass filter. This is a boundary sharpening filter. |
| 5x5H | Image is smoothed using a 5x5 high pass filter. This is a boundary sharpening filter. |
Note:Smoothing the Plasmasphere plot does not effect the plots which are derived from the inversion such as the gradient and radial cut plots. These proceed off the unsmoothed version of the data.
This option allows for the decimation of an image. Decimation is the reduction in the pixel size of the image by regridding it into a smaller number of grids. It is an excellent smoothing mechanism for an image. NOTE: The decimation is performed by regriding the image and NOT by removing lines of pixels. Data is averaged and not omitted. Decimation is run before smoothing.
The decimation value defines by how much to reduce the number of pixels in the two plot dimensions. A decimation of 1 returns the plot grid intact. A decimation of 2 halves the number of grids in both plot directions. The specified decimation does not need to be an integral value.Note:Decimating the Plasmasphere plot does not effect the plots which are derived from the inversion such as the gradient and radial cut plots. These proceed off the undecimated version of the data.
The Radial Cuts plot can contain multiple profiles of the He+ geomagnetic equatorial density at fixed magnetic local times (MLT). These three options specify the MLT of the first cut, the termination MLT and the step size in hours to use in advancing the from one MLT cut to the next. Since the ending longitude is not included in the output a range of 0 to 24 hr will not duplicate the 0 hr plot. The Nth cut in the plot occurs at MLT
Both the Raw and Smoothed He+ solution matrices are generated once per iteration step in the inversion and each can be output at any or all of the the iteration steps. The Start option gives the first iteration step at which to output the matrix. The first iteration step is 0 The End option is the iteration at which to terminate the plots and may or may not be output depending on Delta. The Delta option sepcifies the number of iterations to skip between output plots. A plot is output V given by
An option value of -1 for either the Start or Stop iteration step is equivalent to the last iteration step in the inversion. To plot then just the last iteration step set the Start and Stop to -1 and Delta to 1.
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