[daip] aips calib

[Eric Greisen]

Cao Hongmin wrote:
> Hi Eric
> 
> when we do amplitude+phase self-calibration using calib with an input 
> image,
> 
> will it make much difference if we set aparm(1) =3 and aparm(1)=4 ?
> 
> thanks for the helps
> 
> best regards
> 
>      hongmin

When there are only 3 antennas, the phase will exactly match
your model.  For antenna-based calibration such as CALIB it
is probably best to insist on 4 antennas at least.  In normal
cases, there should not be much difference.

Eric Greisen