[daip] Very large dataset

[Eric Greisen]

Flor Allaert wrote:
> Hi,
> 
> My name is Flor Allaert and I have a practical question concerning the  
> reduction of some EVLA data in AIPS. The data were taken last summer,  
> at eight different days. Fifteen sub bands were used, each 1 MHz wide  
> and overlapping half of the previous one (so over a range of 0.5 MHz).  
> As far as I know, one should in principle flag and calibrate the data  
> from each sub band and each day separately. However, this would mean  
> flagging and calibrating 120 different data sets and I do not have  
> time for that.
> What strategy would you advise to reduce these data within a  
> reasonable time frame?

I suspect that it would be a lot easier to handle the files if they are 
not too big.  But, as you say, 120 separate ones is too many.  Try doing 
each day together.  All AIPS tasks can loop over "IF" (spectral window) 
so this should work out fine.

Eric Greisen