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1 Rectangular field (mosaic)

to to by -2 bp
Image didyouknow By default, the spatial editor shows only the rectangular area defined for the mosaic. To see the individual pointings set up by the OT, you need to press the Show pointing positions button in the toolbar above the spatial editor.
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width height depth 0 0 0 rg =0bpto

The Rectangular Field option is a convenient way to easily set up evenly sampled rectangular mosaics on a per-source basis. You simply specify the size of the field as p length times q length, the Position Angle and the Spacing of individual pointings. By default, the spacing is set to Nyquist sampling (Spacing = 0.48113 times fraction of main beam). If you change this, you must carefully justify your choice in the Technical Justification (Step 3.9). For rectangular fields, the 7-m Array pointings are automatically set up to optimally sample the area specified, therefore the number of pointings will be smaller than for the 12-m Array. You may wish to export the coordinates of the individual pointings; this is easily done using the Export button next to the displayed number of pointings.


next up previous contents
Next: Select the calibration strategy Up: Finalise the spatial setup Previous: Individual Pointing(s)   Contents
The ALMA OT Team, 2016 Aug 23