From reid@cfa.harvard.edu Wed Oct 24 00:13:39 2007
Date: Wed, 24 Oct 2007 02:13:19 -0400 (EDT)
From: Mark Reid <reid@cfa.harvard.edu>
To: "VLBI Observers (Aspen only)" <vlbiobs@nrao.edu>
Subject: Re: BR129

Lisa,

   Thanks for getting BR129 going.  As for the DDS3 vs DDS4,
as long as the data fit on one tape and we can read them at
the CFA, DDS3 would be OK.  (I assume a DDS4 reader can read a
DDS3 tape).

Mark

On Mon, 22 Oct 2007, VLBI Observers (Aspen only) wrote:

>
> Hi Mark,
>
> Greetings from Socorro. You should have already gotten the
> observing log for BR129AA, which ran on Oct. 18. All remaining
> epochs of BR129 are now in the dynamic queue.
>
>
> >> By the way, one of the operators pointed out that your data
> >> sets would often be small enough to put on a DDS3, instead
> >> of a DDS4, as you have specified in the 'cortape' parameter.
> >> Would it be of any benefit if we default to a DDS3 when the
> >> data will fit on one? The online archive is also a convenient
> >> option, just put 'FTP' in the 'cortape' slot.
> >
>    You wrote:
> >
> >   BR129 requires 2-pass correlation, with one of the passes very
> > near the correlator output limit.  The data sets are typically
> > ~10 Gbytes.
>
> Yes sir, that is my point. DDS-3 tapes have a 12GB capacity, so
> many of your data sets could use them instead of DDS-4, which go
> up to 20GB. But of course it is up to you.
>
> cheers,
>
> Lisa Foley
> NRAO Data Analyst
>