Difference between revisions of "Set Pointings"

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(Created page with '{{Simulations Intro}} Category: Simulations == Specifying Pointings == The pointings in a mosaic observation are specified in a text file (default name '''$project.ptg.txt'…')
 
(Specifying Pointings)
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* '''direction''', '''mapsize''', and '''pointingspacing''', specify where you want to observe, and how to space the pointings of the mosaic.
 
* '''direction''', '''mapsize''', and '''pointingspacing''', specify where you want to observe, and how to space the pointings of the mosaic.
* '''maptype''' selects a linear or hexagonal tiling pattern
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* '''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.
 
* '''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.
 
Naturally, you can run once with '''setpointings'''=True, '''predict'''=False, edit the pointings file, and then run with '''setpointings'''=False, '''predict'''=True.

Revision as of 15:49, 9 June 2010

Simulating Observations in CASA

Specifying Pointings

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.