The GMEPlot application outputs two types of plots, the density and differential energy flux plots produced in the inversions of the EUV, MENA and HENA images, and ion spectra plots.
Clicking on the Run button in the User Interface menu begins the the program which runs using the options defined in the menu. The first action of the program is to produce the plot which make up the matrix SM equatorial inversions. The figure below shows the plot matrix produced from the esample menu of the previous section.
Once the plots are output, the ion spectra at any location within the displayed geomagnetic equitorial plane can be viewed by left clicking on the position in any of the plots. This produced a + at the location in all of the displayed plots.
Spectral plots are output in a window separate from the inversion plots. The window is divided into two sections with the spectra output in the lower section and information associated with the spectra output in the upper section. The plot below show the spectra produced from the selection in the figure above.
Solid glyphs in the spectral plot are used for data which come from the the MENA inversions and open glyphs for the data which come from the HENA inversions. Clicking on the Fit It button in the upper right will both fit the spectra and compute the moments, both as defined in the User Interface menu.
The computed moments along with other information on the spectrum are output in the upper section down one of the free columns. The entries are color coded to match the color used to output the spectra and each entry is identified by a trailing mnemonic. These mnemonics and there definitions are given in the table below.
| MNEMONIC | DESCRIPTION |
|---|---|
| X | The SM X coordinate corresponding to the spectrum |
| Y | The SM Y coordinate corresponding to the spectrum. |
| D1 | The density derived from the fit to the lower energy portion of the spectrum. |
| T1 | The temperature derived from the fit to the lower energy portion of the spectrum. |
| D2 | The density derived from the fit to the upper energy portion of the spectrum. |
| T2 | The temperature derived from the fit to the upper energy portion of the spectrum. |
| D | The total density derived from the fit to the the spectrum. |
| T | The total temperature derived from the fit to the the spectrum. |
| K | The derived kappa from a kappa function fit. |
| DM | The density derived from the integration of the MENA portion of the spectrum. |
| TM | The temperature derived from the integration of the MENA portion of the spectrum. |
| DH | The density derived from the integration of the HENA portion of the spectrum. |
| TH | The temperature derived from the integration of the HENA portion of the spectrum. |
| DI | The density derived from the integration over the total spectrum. |
| TI | The temperature derived from the integration over the total spectrum. |
There are spectra which are essentially unfittable or will not be fit well by any fit routine. This is the reason for separating the fitting and moment computations from the spectra output. Once the spectra has been plotted and viewed and before clicking on Fit It the user has the ability to change both the fitting algorithm and the method of the moment computation in the User Interface. These changes take effect immediately. For example, if a plotted spectra does look like it can be adequately fit by two Maxwelians, the fit can be turned off and the moments selected to be computed by direct integration of the spectra. Also you can reselect a spectra to be plotted (click on the same location in the inversion plots as the spectra to be redrawn) and the alter either the fit and/ro moment computation method to see the differences.
Multiple spectra can be plotted by selecting multiple points in the matrix of density mapping plots. Each spectra will be plotted in a different color and its characteristics output in a separate column in the informaton section. If enough spectra are drawn so that the colors available are exhasuted, the colors are recycled and a new plot glyph is is used. Remember that if a spectrum is to be fit, it needs to fit prior bringing up the next spectra.
You can remove spectra from the plot by right clicking on any of the +'s in the map plots. This deletes the + and the corresponding spectra plot and set of information. The plot below shows the previous plot with the red spectra removed.
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