[daip] Visibilities in AIPS

[Eric Greisen]

Hans-Rainer Kloeckner wrote:
> Hi Amy,
> 
> 	Thank you for the rapid answer it helped a lot to know that if the  
> weights are negative the data is flagged.  Sorry for being not  
> entirely clear in my question.

If the weight is zero, the data are also flagged.  We try to retain the 
abs value of the weights but we lose that with compressed data and in a 
few other circumstances.

Eric Greisen