[daip] PCAL

[Jim Ulvestad]

Leonia's comment in CHANGES.DOC says that data should be
phase-calibrated before PCAL.  What does this mean?
PCAL has previously been used to do the delay
calibration for each IF in VLBA observations, and
there is no phase calibration before that (only
the parallactic angle correction).  If I interpret
Leonia's message correctly, he seems to me to be
saying that you have to fringe-fit before
running PCAL, which takes away the whole point of
using the pulse-cals to do the initial delay
calibration in continuum observations.
If you average the pulse-cals in a given IF, then
how do you use them to get delays?

Perhaps I'm being dense or jet-lagged or just plain
misunderstanding the message, but this strikes
me as being a problem.

jim