National Radio
Astronomy Observatory

5.3.4.4 Sub-parameter mosweight

If mosweight=False (default) then the data will be weighted for optimal signal to noise ratio across the mosaic image. This should be used for most cases.

If mosweight=True then individual mosaic field relative weights will be readjusted on a per visibility basis (much like uniform gridding weights). This may give better performance in cases where one or a few fields in the mosaic have drastically different weights and/or integration time, and it is desired that the noise be more “uniform” across the mosaic image. Use this with care, we have not explored its use fully.

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