Date: Wed, 18 Jun 2003 09:23:45 -0400 (EDT)
From: John Monnier <monnier@umich.edu>
X-X-Sender: monnier@imager.astro.lsa.umich.edu
To: Sam Ragland <sragland@cfa.harvard.edu>
cc: pschuller@cfa.harvard.edu,
        Jean Philippe Berger <Jean-Philippe.Berger@obs.ujf-grenoble.fr>,
        carleton@cfa.harvard.edu, epedretti@cfa.harvard.edu,
        mlacasse@cfa.harvard.edu, rafael@ipac.caltech.edu,
        schloerb@fcrao1.astro.umass.edu, Wes Traub <wtraub@cfa.harvard.edu>
Subject: Re: Origin of readout dependent closure phase offset

here's my take: (maybe I shouldn't be responding right before bed.. but I
just worked this out..)

> I get the same delay irrespective of # of loops & reads.
> Am I missing something?

I agree the _absolute_ time difference is always the same; however the
_total_ time per "sample" (a "sample" is the average value of the each
cycle of reads and loops in a detector pixel) is longer, so that relative
error is less for multiple loops.

Since the way we do things, each 'sample' is always the same amount of
phase of the fringe, the low loop patterns have a larger phase "delay".


-jdm