[daip] AIPS query - inverse taper

[Eric Greisen]

Cormac Purcell wrote:
> Hi Eric,
> 
> I wonder if you can help me with some AIPS advice? I am nit-picking over 
> some CORNISH data with significant flux in the short baselines. Using 
> uniform weighting and a lower uv-cutoff of around 5 kilo-lambda improves 
> the images in some cases, but in others I think the sharp cutoff 
> produces undesirable undulations in the image.
> 
> I would quite like to try applying an inverse Gaussian taper, but after 
> hunting through the AIPS cookbook and asking around here I have not come 
> up with an easy way to do this. Is this possible to do using an AIPS 
> task, or script?
> 
> Any help would be very much appreciated.
> 
> Take care,
> 
> Cormac
> 

The option UVBOX has the affect of acting like an inverse taper - if you 
make it rather larger than 1 (its default) at least for centrally 
condensed arrays such as the VLA and GMRT.

What it will do with other arrays I am less certain...

Eric Greisen