The pointings in a mosaic observation are specified in a text file (default name $project.ptg.txt). You can create this file yourself (setpointings=False), or simdata can tile a rectangular area on the sky and create the file for you (setpointings=True).
- direction, mapsize, and pointingspacing, specify where you want to observe, and how to space the pointings of the mosaic.
- maptype selects a square (regular raster) or hexagonal (alternate rows offset by 1/2 primary beam) tiling pattern
- integration specifies how long to observe each pointing of the mosaic.
Naturally, you can run once with setpointings=True, predict=False, edit the pointings file, and then run with setpointings=False, predict=True.