[daip] more issues with VBCAL

Eric Greisen egreisen at nrao.edu
Tue Nov 3 13:28:34 EST 2009


Lynn D. Matthews wrote:
>     Eric,
> 
> I tried the new VBCAL and no more overflows. However, there still seem 
> to be a couple of issues.
> 
> First, APARM(10) is supposed to control which polarization is scaled. 
> Setting this to zero scales only RCP as advertised, but APARM(10)=1 
> scales both, not just LCP.
> 
> The second thing is that it is scaling the amplitudes by BPARM(1)**2, 
> which is not my understanding of what it is supposed to do. In the input 
> listing it implies that it should scale by "Factor =SQRT(fac1*fac2)", 
> but the help file states "If APARM(9) is less than zero, all antennas of 
> all arrays are multiplied by BPARM(1)".
> 
>     Lynn

Quite right - I did mess up even more than intended.  Fixed this mode 
and added a correction for weights which you can suppress.  Try again 
tomorrow

Sorry

Eric




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