The parameter panel sets the properties of the channel maps sequence.
It is devided into two global and individual channel properties. By default the velocity channel map mode is on. If you wish to render lightechoes, then turn on the Lightecho button. Then the panel changes to units appropriate for this mode (see below).
The Initial vel (km/s) parameter is the central velocity of the first channel, which is displayed at the top-left of the display. Δ vel (km/s) is the interval between different channels and Resolution is the total range of velocities that is included in this change, i.e. it includes velocities within the range Δ vel ± Resolution/2. The brightness weighting for this interval is uniform.
The next parameters set how many Rows and Columns the array of channel maps will have. By default the brightness of the maps are normalized to their peak. If you wish to normalize them to the global peak, then disable the Normalize button.
The Auto Grid controls whether the individual channel map parameters are set by the Global Parameters. If this button is disabled, you can select and set individual channel parameters in the Channel Properties section. When you make changes to individual map parameters, then you must use the array button (calender icon) to update the grid. When the Auto Grid is enabled, changing any Global Parameter will automatically update the array. Furthermore, in this case, when you click on the Map button to render, the grid is updated automatically to the Global Properties. Then the intervals between the channels will be uniform. |