[daip] quick question

[Laura Chomiuk]

Hi Eric,
	Ok, thanks! I'll definitely try those RFLAG suggestions, and I am
glad to learn of REFLG. App E is looking good!
	I was mostly curious about the differences in time averaging, and
that answers my question, thanks. UVAVG does have a SMOOTH parameter---am
i missing something? does this not actually apply the smoothing to the new
data set?
		Thanks!
			Laura




On Tue, 2 Aug 2011, Eric Greisen wrote:

> Laura Chomiuk wrote:
> > Hi Eric,
> > 	I'm sorry to miss your science tea today, but i don't think the
> > tea room is equipped with videocon! I've been messing with RFLAG some and
> > plan to experiment with it more today. Do you typically run RFLAG three
> > separate times: once on your (faint) science target, once on your gain
> > cal, and once on the bright flux cal?
> >
> > I have another question for you too: Every time i get a new data set,
> > i want to time average it and hanning smooth it (with the same task,
> > preferably). Which is the better task to use: UVAVG or SPLAT? These two
> > tasks seem to time average quite differently. Or maybe there is some other
> > task that is even better?
> > 		Thanks!
> > 			Laura
> >
> >
> RFLAG is a new task so the right thing to do is not so obvious.  I would
> run it on the strong cal to plot only and then on the target and see if
> the clipping level suggestions are significantly different (adverbs
> noise and SCUTOFF - which change each time you run with doplot > 0).
> Another way they might differ is STOKES='RRLL' vs STOKES='RLLR' - again
> worth testing to see if they differ.  If the suggestions are
> significantly different then one would need multiple executions.
> Otherwise not.
>
> The time averaging in SPLAT is the same as one of the methods in UVAVG
> with the interval set by the first time it sees and the mean time for
> each baseline different.  UVAVG gives you other options which make later
> time gridding things happier.  But UVAVG does not do SMOOTH and you want
> to do that once and for all and then leave SMOOTH=0 thereafter.
>
> Is there some other difference in SPLAT vs UVAVG that I am unaware of?
> Do we need more options somewhere?
>
> I would send my powerpoint but there is little there for you that you
> have not already seen (no real talk just plots and inputs).  Do not
> forget REFLG afterwards.  Perhaps you should check the latest Appendix E
> for a revised sequence of things...
>
> Cheers,
>
> Eric
>