Having specified the spectral setup and in particular the representative frequency, you are now ready to finalise the spatial setup based on the sources you defined in Step 3.4. The maximum total number of 12-m pointings is 150, regardless of whether these are treated as mosaics, offset pointings, or separate sources. 7-m ACA pointings are counted separately.
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The spatial editor
The spatial editor (see Fig. 3.7) is found under the Spatial tab of the Field Setup editor. It can be used to view and edit pointings on a per source basis and will work properly only if you load an image. Either Query one of the image servers selected from the drop-down menu to display a catalogue image of the area surrounding your source, or load and display your own FITS image by clicking the folder icon in the spatial editor toolbar (only J2000 equatorial coordinates are supported). The primary beams of the pointings defined are represented by red circles, and can be moved, added and deleted interactively. They can be displayed for either the 12-m or the 7-m antennas if ACA observations have been requested. If Total Power observations are requested, the area scanned is shown by a turquoise box. For individual pointings, this box dynamically adapts to cover the pointings defined. You can use the buttons in the toolbar above and below the spatial viewer to perform simple visualisation operations such as adjusting the cut levels, zooming, and saving the image. Please see OT video tutorial 3: The Spatial Field Setup for a practical demonstration of all functionalities.
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