[daip] AIPS and BPASS

[Yuri Y. Kovalev]

Dear Eric,

Thank you very much for your comments.

> How stable are the phases within each scan?  If they are stable,
> bpassp(5) should be 1.  If amplitude is stable, but phase is not,

I am sorry, but I do not understand, what kind of stability do you mean? 
I did not understand this in the AIPS help to bpass, I still do not 
understand it getting now in an e-mail from you.
Stability in time?
Stability (being constant) versus sp channels?
The same question goes for amplitudes stability.

What does the 'stability' mean?

All the sources are different. And FRING solutions are different.

> bpassp(5) = -1.  With 0, the data of each record are normalized in amp
> and phase which can introduce a Ricean bias since the expeted amplitude
> in the case of no signal is not zero.  VLBI often uses all channels so
> bpassp(10) = 1 or 4 rather than 2.

What is the differnece between bpassp(5) = -1 and bpassp(5) = +1 ?
In a sence of getting bpass solutions and calibrating phases and 
amplitudes by bpass calibration application?
Is there anywhere a memo discussing it in details? Would appretiate it 
very much. After your first comments I see that I trully need to 
understand how does it work in AIPS. Thanks!

Yuri